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811a amplifier

811a amplifier


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Actually it is a project The envelope, anode, and filament are identical to the 811 tube. How To Build The DX-811A All-Band Linear Amplifier. Amplifier Project. The 45 sounds great to me for about 90% of my listening, just lacks a little power sometimes. however he was passed way on early 1998. i have 2 brand new ameritron battery displays still in the box. iec 120 vac input connection bnc rf input phono 12 vdc keying input @ 200ma 장사익 진정 난 몰랐네 song By 811A se vacuum tube amplifier. 5 out of 5 stars 5. CQ Magazine September 1982. I have a 300 watt antenna tuner which I use to tune up my ladder line fed antennas. The 572B is an indirect descendent of the 811 tube. Chinese 811A Available in Singles or Matched Pairs - please select from list. The commercial and homebrew 811A amps out there have some variations that can provide some differences in detailed quoted performance parameters (drive power, plate current, grid current, power out (or power input from older times), tuning methods). 572B AND 811A TUBES IN STOCK 06/08/15!! Electron tubes and vacuum tubes for broadcast, industrial and special purpose 3CX3000A7 tube is a hi mu triode used as The 811A has a plate dissipation of 60 watts whereas the 572B has a dissipation rating of 160 watts. 85: AL-82. hf amp, 800w, (4) 811a tubes, us 120vac $1,049. comhttps://www. This amplifier is only a few years old and thus has all current updates installed from factory. Gonset GSB-201 Model 3340 Linear Ham Radio Amplifier + 4x 811A Tubes PLEASE READ Available for sale is a Gonset GSB-201, serial number G19819, amplifier. HIFI EXQUIS will use double box package to send the tubes, We guarantee the tube will devliered to you with good condition, But thank you always to check the …811A - Triode, Power Amplifier, China - Chinese 811A Available in Singles or Matched Pairs - please select from list. 2A3 tube was introduced in 1932, designed specifically for audio amplifier output stage. Ameritron AL-811 Amplifier manufactured in late 2013 and extremely clean inside and out – tubes show full output on all bands – comes with original factory double box set. 500 watts input all 9 hf bands self contained desktop unit . Each linear amplifier hf vhf home made with 4cx800 gu74b gu78b 3cx1200 3cx1200a7 8877 3cx1500 4cx250 4cx15000a gu36b Built to the same “Special Tube Request” specs of leading amplifier manufacturers of the 1960s, the 6L6GC STR is a rugged and reliable power tube for use in the most demanding guitar amplifier circuits. Some amplifiers still use 811A’s and are inexpensive to replace. This is the LAST of the US made 811A. The biggest difference between the 100 watt transceiver signal and the Ameritron amp is the reports. By what tendras a stability and performance perfect in bands high that not is possible get with other tubes not neutral. SV811-3. They are so The AMERITRON AL 811H Amplifier linear of HF . One of the best sources of information on the matter is Tom (W8JI)’s site; he has a great page here: 811A tube 572B tube history. Amplifier Project. . Other topics covered include Fuse Resistors, C10 modification, Connections and Lubrication, Power Supply Diodes, MOV across C2, Tuned Input Alignment, Tune / Load Adjustment and ALC Waters & Stanton are suppliers of amateur and professional radio equipment, GPS, marine, aeronautical and short range handhelds as well as Europe's largest ham radio demonstration center. I am looking for schematics for this project and am in high hopes someone 811A - Triode, Power Amplifier, China--Chinese 811A Available in Singles or Matched Pairs - please select from list. Yaesu FL-2100B Amplifier at ki6jjw I have a Yaesu FL-2100B amplifier (twin 572b's) that I got which was in pretty rough condition when I examined it. NEW VERSION 2016 The ACOM 1000 HF linear amplifier is one of the best amps in the world for radio amateurs as price/performance ratio. Single-ended triode Amplifiers using zero-bias transmitting tubes by Michimori Hirokuni. Even the average ear can recognize the holographic soundstage, smoothness, and the crystal clear resolution that a tube amplifier can deliver. How To Build The DX-811A All-Band Linear Amplifier CQ Magazine September 1982 BY F. I purchased a Quad set of 811A Sino tubes for an RF Amplifier. Low cost, high quality, 811A and 866A tubes Fan forced-air cooling—clean, functional styling The Heathkit "Warrior" puts high quality, power-packed performance within easy reach of every amateur who wants a big boost in transmitting power! Ameritron mounts the 811A tubes vertically -- not horizontally -- to prevent hot tube elements from sagging and shorting out. Shop with confidence. You get absolute stability and superb performance on higher bands that can't be matched by un-neutralized tubes. One of the best sources of information on the matter is Tom (W8JI)'s site; he has a great page here: 811A tube 572B tube history. Inspired by McCoy's "Junker Amplifier". 811a amplifier Click on the Volume Number or cover image to display the full issue in PDF format. Alibaba. both person use just same kind of positive grid tubes 811A , 830 ,838 , …Find great deals on eBay for 811a and 811a tube. 811A - Triode, Power Amplifier, China SINGLE TUBE. The 572B is just a more rugged version of the 811a's. A valve RF amplifier (UK and Aus. 811A SE amp • 811A is a compact size zero-bias transmitting tube and easy to designing & assembling for Audio amplifier • Plate dissipation 65W(ICAS), filament 6. MC - music culture technology Germany. The output of the 811A is connected to the load through a high-quality air-gapped transformer that provides 4, 8, and 16-ohm taps. com. 50. com The 3CX3000F7 amplifier photographed and described above has been operating flawlessly for three years on 80 and 40 meters. Added pi-net tuned inputs for 160-10 Meters Construction based on two Junker military tuning unit cases mounted "front to front". 811a audio amplifier datasheet, cross reference, circuit and application notes in pdf format. $79. MARCELLINO, W3BYM. This circuit is under:, audio, vacuum tubes, 811A produced by 10W tube final amplifier l59823 Characteristics of the transistor 811A to the right, when this type of pipe work there is gate current generating means, in order to effectively discharge grid current, conventMatched Pair PSVANE 811A Vacuum Tube For Medical Amplifier. The 4-1000 tube is still readily available and can easily product 1500 watts of continuous output AdGood Price on professional power Trusted, Audited China Suppliers. First they're constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot If you own an 811A based amplifier like an Ameritron AL-811 or AL-811H, do yourself a favour and get a set of Ryazan G-811 NOS tubes – aka the Svetlana 811A – before they run out and you are once again stuck with inferior Chinese tubes! 811A plate current Voltages and currents are approximate. $21. Abstract: 811A NL-811A 811A tube power amplifier 1000 watts rms 811A SOT23-3 811a audio amplifier Text: A. I acquires an Ameritron 811 amp (not working) for a ridiculously small amount. The power supply uses solid-state bridge rectifiers. There is the 811A but that's a zero bias triode so even a class A amplifier using this tube would have to draw grid current. Although I plan to use it for other things, I mostly wanted it just to be able to produce a decent AM signal. For sale is very cool amplifier that is a perfect blend of style and substance. 812 Tube The 812 was a moderately low mu tube, primarily intended for grid driven modulator The 811a tube was originally designed for audio use and it really wasn't for use at RF frequencies but, what do I know, the manufacturers use them all the time (but you don't see them operating above 30 MHz). Ameritron Al-811 linear amplifier gives you plenty power to bust thru QRM. From HF, VHF, UHF, 50Mhz, 70Mhz and 144Mhz through to 432Mhz and 1296MHz the DX Shop supplies Linear Amplifiers, Antennas, Aerials, Masthead Preamplifiers, LNA, Coaxial cables and connectors, sequencers and amplifiers for your ham radio station. Bottom, sockets, grid coil, fil xfmr. Find High Power Rf Amplifier Today!Find great deals on eBay for 811a tubes and 572b tube. 00 each All information, images, and documents on this website are the sole property of Ameritron Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Ameritron Introduction and Historical Background: After I completed the 6CL6 One Tube Transmitter, I decided that I wanted to build a matching amplifier. 95 * Buy It *After Coupons & Promotions. No sooner did I almost finish the exciter than I discovered that 10W on CW is not my cup of tea. Socket is very rare. It operates in The 811A isn't really the best valve for this sort of circuit because it is designed to run an appreciable grid current and also takes relatively little anode current at lowish HT voltages (as compared with a conventionally biased valve). Quality construction includes barrier block and cover. You will usually find schematics of linear 811A amps inAmeritron AL-811h Linear Amplifier. Ameritron AL-811H 160 - 15M Ham Amplifier 800 this is a used ameritron antenna tuner works very well. AL811H Amplifier Myths, Changes, and Information The 811A tube is the transmitting tube equivalent of the "sweep tube" commonly used in the 60's. Model 811A Die Head works with pipe threading machines 1215, 1233, 535 Amazon's Choice for "811a" 811A - Triode, Power Amplifier, China. After obtaining a pair of surplus Motorola Starpoint channel modems to use as SSB exciters at WC2XSR/13 on 168 KC, I wanted to build an amplifier to boost the power to about 400 watts, which is the maximum licensed transmitter output power for WC2XSR/13. Matchede Pair Psvane 811a Audio Valve Vacuum Tube Instead of 811a 811 Fu-811. Throughout history, to speed development and reduce tooling costs, newer tubes use tooling from older tubes. We have mostly RCA 811A from the era when they had to last. Tube 811A or Röhre 811A ID19220, Transmitting Triode, air cooled, UX-Base (4 Pins (2 thick, USA 1924, UX) and shown. This article examines the performance of the Ameritron AL-811H amplifier with the supplied 811A tubes and with 572B tubes, and details a procedure for replacement of existing tubes. These valve found much use in amateur transmitters. This amplifier uses two 572B (T-160L) high-mu graphite plate triodes (see Figure 2), a design improving on the 811A; each tube The DX Shop - Antennas, Amplifiers and Accessories for the dedicated Radio Amateur. Call Us Now!See the Electronic Repair page for more details. 11. Subject to terms and conditions of each individual seller. PA150 HF LINEAR 200W Amplifier The PA150 is a 200 Watts SSB/CW rugged HF Linear amplifier units that will give many years of hard working service latest and smallest amplifier. Ameritron Al-811X linear amplifier gives you plenty power to bust thru QRM. T. We have been doing business with famous companies in USA,Japan,Germany,Australia,Italy and Netherland. The 811A has a plate dissipation of 60 watts whereas the 572B has a dissipation rating of 160 watts. The plate current meter cover had been smashed, and an incorrect replacement was glued over the meter itself. com Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting tubes. A fellow ham got an Ameritron HL - 811H RF amplifier from estate of a deceased colleague . AU $8. 1965 Era AB763 Reverb Guitar Tube Amplifier Kit; This is the 811A. A transistor has three connections (collector, base and emitter), whilst the input and output of an amplifier circuit each require two connections, making four in total, therefore one of the transistor´s three connections must be common to both input and output. The AL- 811H uses four 811A tubes in a class AB2 grounded grid circuit. 6-56, 6-58 and To meter grid or plate current, Buy 811A - Triode, Power Amplifier, China: Power Amplifiers - Amazon. etc. While there may be very rare exceptions to this, nearly 100% of the time neutralization of an HF PA or power amplifier vacuum tube has virtually nothing to do with VHF or UHF oscillations. All information, images, and documents on this website are the sole property of Ameritron Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Ameritron Only the AMERITRON AL-811H gives you four fully neutralized 811A transmitting tubes. Direct heated triode power output tubes are really interesting. With that 47K resistor to ground , grid rectification would make the grid so far negative that the tube would be cut off. Home > Shuguang Tube > Emitter Tube > Shuguang FU-811(811A In general, everyone agrees that an SE voltage amplifier and/or power amplifier operates class-A. Ameritron AL-811 amplifiers are manufactured with three tough 811A transmitting tubes. After a simple repair, it worked well but the tubes were a bit soft. Absolute stability - superb performance on higher bands that can't be matched by un-neutralized tubes - vertically -- not horizontally mounted tubes to prevent hot tube elements from sagging and shorting out. If you need to find 811A's that will be guaranteed for use in this amplifier, and will be matched, the only place that I know of that offers them up is RF parts (www. 11-15 Harley Crescent, Condell Park · Directionsamplifier. Currently, just a box of parts! This is the collection of parts I hope to turn into a linear amplifier, based on the 65 year old RCA 811A tube design. A large number of users experience short tube life and wonder why? Lets examine that Modifications and service of AL811 amplifier Ameritron. AmateurRadio. Hi Chris, I have many ARRL Radioamateur's Handbook in stock from the period 1950 - 1965. It's all about a double project. This amplifier uses a pair of 811A's in the final. MARCELLINO, W3BYM 13806 Parkland Drive, Rockville, MD 20853 This project began in the summer of 1981 at a hamfest held at Find great deals on eBay for 811a tube. In fact the original version of the linear amplifier unit was made that size, but it was a very tight squeeze and, reluctantly, it was decided to make the final version slightly larger. 811A - Triode, Power Amplifier, China - Chinese 811A Available in Singles or Matched Pairs - please select from list. chris, AA9HD ***Remove the 'IHATESPAM' in my email address to reply*** While selecting a tube around which to build a linear amplifier may seem the logical way to go about it, more often than not amplifiers are designed around a tube or tube pair that we already have, or have a hot lead on. 5 lbs. org/ameritron-al-811-tubeAuthor: Thomas KisnerViews: 7. 2A3 Tubes. The most usable tubes were also made for the government during World War II. by SHUGUANG. 11-15 Harley Crescent, Condell Park · DirectionsAdWelcome to Kensaq. About 10% of these are amplifier, 3% are other electrical equipment, and 1% are acoustic components. Ask for SV572 Series data. Ameritron mounts the 811A tubes vertically -- not horizontally -- to prevent hot tube elements from sagging and shorting out. Blond fascia, rare 1 volt sensitivity input model (most are 2v sensitivity). The same chassis construction used on the transmitter was also used on the amplifier. The 811A's are instantly heated; thus, there is no delay in warm-up. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of transmitters, transmitter output stages switching hf amp, 800w, (4) 811a tubes, us 120vac $1,049. Ameritron AL-811X HF Amplifier, 600W, (3) 811A Tubes, 240V AC. More about this upgrade on my website: http://kn6q. Multi-tapped power transformer matches any …11-15 Harley Crescent, Condell Park · Directions. The MD Abstract: 811A NL-811A CI 7400 power amplifier 1000 watts rms 811A tube NL811 class B push pull power amplifier 811a audio amplifier 6 watts resistor Text: NATIONAL NL- 811A September 1992 Page 1 The NL- 811A is a three-electrode tube designed for , , …AMERITRON AL-811 Linear Amplifier 3 x 811A Tubes HF 600 Watts PEP. Steel Dragon Tools 97065 Model 811A Quick Opening Die Head for RIDGID 300 535 Pipe Threading Machine. AL811, AL811H, AL572, other amps trouble shooting guide 811A Tube History and Construction The envelope, anode, and filament are identical to the 811 tube. So, the turns ratio of the mod iron (in conjunction with the voltages applied to modulator and RF amp) needs to be within a workable range. MFJ has an add-on modification circuit board that will automatically shut down the amplifier if the grid current exceeds 200 ma during key down tune-up. Uses 4 811A tubes but this one has the heavier duty 572B's instead. 00 each All information, images, and documents on this website are the sole property of Ameritron Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Ameritron Hi group , I want to build a 10 - 40 meter linear amp. The usual design approach is to idle the output stage at the limits of the tubes, and hope that this is slightly higher than maximum output required. HRO Discount Price: $819. co. With about 20 watts drive from the Ranger, it will put out about 120 watts carrier and modulate up to about 200 watts peak on AM. BY F. 11/09/2016 · I have made several PP amps using 811a's with 600 volts 2k Plate to plate easily gives 100watts; I used two 6bl7's as the cathode drivers; hope to try mosfets; may give better performance, but the 6BL7's do the job very well. I came across your flickr site when I was doing a search on 'parafeed 811A amplifier'. Plus, the tubes are so inexpensive that you can replace one for mere pocket change. Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting tubes. I would not run RTTY on an amplifier using 811A’s. 800W Output Linear Amplifier w/ 4 811A Tubes on 100/110/120V for US Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting $918. I might come up with some sort of amp using them as I can get some at a reasonable cost. AMERITRON AL-811 Linear Amplifier 811A AMERICAN Tubes for 110/220VAC - $795. Find High Power Rf Amplifier Today!About Us: 1. uk 01922 414796, for all your radio amplifier valves needs. MC development engineering team continue the success to further develop a double qualtiy standard new model for MC amplifier line. 99 (1 new offer) Product …Used 811A Tube for sale on 300+ second hand hifi sites & shops. 00 $ 21 00 + $5. Find great deals on eBay for 811a tube. You get a quiet desktop linear thats so compact itll slide right into your station -- youll hardly know its there until QRM sets in. Featuring 811a Penta Laboratories available for purchasing today online! 811A is originally used in B class P. I would recommend the amp and power supply be fed with their own proper circuit breaker to match the wiring of your home or the wire you choose to install for the project. This is the unexpurgated, pre-edited version of the article "Improved Anode-Circuit Parasitic-Suppression For Modern Amplifier-Tubes" that appeared on page 36 in the October 1988 issue of QST. Model : MD-811 A Class Single Ended 15W+15W Power Amplifier: The MD-811 Music Dandy features the classic RCA-designed 811A triode transmitting tube, a standard in radio communications applications since the early 1940s. "New" refers to a brand-new, unused, unopened, undamaged item, and "Used" refers to an item that has been used previously. Find great deals on eBay for 811a tubes and 572b tube. Choice of either (4) 811A Triodes or (4) 572-B Triodes Scientific Radio Systems SR-110 Kilowatt Amplifier's shown in stand-by and main mode, side by side. Many hams like the challenging of hunting for parts to build a high quality amplifier out of inexpensive surplus parts. The AL811 tube is a descendent of the 812 tube. Does anyone know where i could find plans for an 811-based HF linear amplifier? thanks. How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned First theyre constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot enough to melt. Find Stereo amplifiers for home today811a audio amplifier datasheet, cross reference, circuit and application notes in pdf format. using 811A tubes . Find great deals on eBay for 811a valve. The 3-500Z is a relatively inexpensive tube and has been around for a long time. speakerhospital-srp. The 572B is just a more rugged version of the 811a's. Buy 811A amplifier valves from Radioworld. I came across your flickr site when I was doing a search on 'parafeed 811A amplifier'. 811A Class C Amplifier There seems to be no end in sight for this building frenzy. This is about 600 watts carrier or PEP CW output power. Throughout history, to speed development and reduce tooling costs, newer tubes use tooling from older tubes. this auction is for an ameritron pnp-8d accessory cable. is a curation of 125 resources about , 40m linear amlifier made by 9A6A, Granta Contest Group - HF amplifier, 811 Linear Amplifier project, Adding 160M to HF amplifiers, 3 x 4-400A project. 13806 Parkland Drive, Rockville, MD Ameritron AL-811 Linear Amplifiers are quiet desktop models that are so compact, they'll slide right into your station, and you'll hardly know one's there until AMERITRON AL-811 Linear Amplifier 3 x 811A Tubes HF 600 Watts PEP. In stock fast delivery call now GONSET GSB-201 MODEL 3340 Linear Ham Radio Amplifier + 4x 811A Tubes PLEASE READ - $337. The grid voltage supply for the 811A is also regulated. A pair as a modulator could provide a peak maximum power of 340 Watts but would usually be run below maximum. under RCA 811A Tubes use. They can be replaced without removing the unit from the cabinet. ) or tube amplifier (), is a device for electrically amplifying the power of an electrical radio frequency signal. HF 813 Linear Amplifier I’ve always wanted to build a massive linear amplifier since I was at school. very famouse amplifiers in Japan. Built like a tank, if you're reading this ad you know the 30L1 is a great starter amp / half-gallon all day long amplifier. Built to the same “Special Tube Request” specs of leading amplifier manufacturers of the 1960s, the 6L6GC STR is a rugged and reliable power tube for use in the most demanding guitar amplifier circuits. the 811A, T160L or 572B. The 3 and 4 tube Ameritron amps that use 811A tubes are very popular. 811 / 811A=VT-217 Power Triode (Also see 572B as substitute) (811A have extra long ribs welded on plate for added heat dissipation) (the older 811 have a smoother type plate) - WAVAC MD 811A - ALTEC LANSING 1570B - Ideal Innovations, Canada - Nat. 99 (1 new offer) Product …Find great deals on eBay for 811a tubes. Unbranded. Be sure any un-neutralized 811 amplifier has the damping resistor discussed below. 811A Tubes Each TAYLOR Select 811A tube is fully tested by RF Parts prior to shipment, and includes 1 Year Limited Transmitter Tube Warranty (against manufacturing defects and …Third version of the 811A amp (4P1L choke- loaded cathode follower drive) A new idea raised It may be feasible that 4P1L can be used as a cathode follower driver to the 811A SE amp unlike an idea of 5998A possessing inherent cons such as a) minus voltage PSU needed, b) too much head room for driving to the sensitive tube of 811A. com offers 205 811a tubes products. amplifiedparts. rfparts. 11-15 Harley Crescent, Condell Park · DirectionsOnly the Ameritron AL-811H gives you four fully neutralized 811A transmitting tubes. Conveniently plug it into your nearest 120 VAC outlet -- no special The 30L-1 is a grounded grid linear amplifier with four 811 A Triodes. Global feedback (from the secondary of the output transformer) is used to reduce the amplifier’s output impedance and improve its damping factor. It does have a low amplification factor about like I would expect. ) To make a pentode act like a triode you connect the screen grid to the plate as in Figure C. 1. com is not responsible for typos or other listing mistakes. Find more The 811A Glass Tubes,Great For Your Amplifier Used worldwide, SOLD PER VALVE! Read more WAVAC MD-811 TUBE INTEGRATED, OWN A LEGEND! for sale. AL-811H four fully neutralized 811A transmitting tubes. Ameritron AL-811 amplifiers are excellent for the newcomer because they're tough enough to withstand momentary mis-tuning. How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned First theyre constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot enough to melt. Input/Grid Circuit: In a grid driven amplifier it is necessary to match the low impedance of the driving transmitter (typically 50 ohms) to the high impedance input of the tube (typically several thousand to several million ohms). 811A Tubes Each TAYLOR Select 811A tube is fully tested by RF Parts prior to shipment, and includes 1 Year Limited Transmitter Tube Warranty (against manufacturing defects and workmanship) through RF Parts. Distributing that weight as such gave Supplies 1 amp continuous. The best way, if space and money permit, is to use a separate meter for each element, as was done in the Wingfoot 813 Amplifier . net is a Web site dedicated to ham radio (amateur radio). Audio TO BUY 811 and 811A Built to the same “Special Tube Request” specs of leading amplifier manufacturers of the 1960s, the 6L6GC STR is a rugged and reliable power tube for use in the most demanding guitar amplifier circuits. HF amplifiers for ham radio use. First up is the power supply. 00 each All information, images, and documents on this website are the sole property of Ameritron Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Ameritron For some reason, I seem to have become a little obsessed with 811A tubes whilst playing around with an Ameritron AL-811 Amplifier. Find great deals on eBay for 811a tubes. Description AL811XCE Ameritron's AL-811 linear amplifier gives you plenty of power to bust through QRM! You get a quiet desktop linear that's so compact it'll slide right into your operating position -- you'll hardly know it's there until QRM sets in. ear mode is the 811A triode from RCA. Chinese 811A Available in Singles or Matched Pairs - please select from list. Resistance Coupled Amplifier Charts:Note ifyou already have an RCA tube manual, and if the tubeslisted on the RCA charts in the back are same as here, the pageswill be the same as what you already have. All of these amps, like the AL811H, push the 811 tubes pretty hard. is a curation of 125 resources about , A GS-35B Amp For HF, HF Tetrode Linear Amplifiers, 4 KW RF Amplifier, Granta Contest Group - HF amplifier, Adding 160M to HF amplifiers. by Sino/China. Three tough 811A transmitting tubes, extra heavy duty power supply, all HF band 811A - Triode, Power Amplifier, China - Chinese 811A Available in Singles or Matched Pairs - please select from list. The Ameritron AL-811H amplifier is designed for four 811A triode tubes. com offers 207 811a tubes products. This is a fairly rare HF amplifier. Buy 811A - Triode, Power Amplifier, China: Power Amplifiers - Amazon. BAND COVERAGE. 10K 10W 18K 10W 10H Ganti's 811A Amplifier by Sridhar Gantimahapatruni based on a Nobu Shisheido design Using the amplifier with 600 watts out produces all the DX and contacts I ever can deal with. It goes anywhere, works like a horse and is driven by very low level exciter. The amplifier features internal control circuits to protect it from high antenna. Despite being relative low powered, 2A3 still is the triode of choice for many high end audio amplifiers and DIY projects. com This is my first post in homebrew, so be gentle with me. The amplifier operates the tubes beyond tubeHF POWER LINEAR AMPLIFIER INSTRUCTION MANUAL The Ameritron AL-811H is an economical 800 watt PEP output linear amplifier that operates reliably from 160 through15 meters. An Amplifier´s Common Connection. 811A schematics Here are some interesting schematics for the 811A tube. Initial reaction is that they are working well to full design specification requirements. Shishido Amplifiers Skematic There are only shishido's amplifiers some of circuit diagram . 45 shipping. BTW, your posts on low powered 845 inspired me to build my 845 monoblocks, using D3a as the driver. (Note: Beginning in 1998, each issue of QEX covers two months. It is just a bit 811A - Triode, Power Amplifier, China. Toward the end of life, additional service may be obtained by operating the filament above its rated voltage. 600 watts solid state hf amplifier $1,899. Personally I would run 572B's in any amp before 811A's simply because of that alone. You get absolute stability and superb performance on higher bands that can't be matched by un-neutralized tubes. This unit has been modified as follows: One input indicated with red sticky has been DIRECT WIRED with silver wire. It operates in class AB2 for SSB and CW. 3V(4A), amplification factor 811A Amplifier - 6 results from brands , products like MATCHED QUAD ( 4) MACHLETT 811A TUBES, Computar Ganz High Quality PS-811A 8 Output power supply, 100vA, 4-8 Amps, 24VAC, Matched Quad ( 4) Machlett 811A Tubes The 811A is a power triode for RF or class B modulator service. 5A power transformer and would like some feedback on the sound of the 811A vs the 45 SET. 7 inches tall yet 18" wide and 16" deep. Related Products KeywordsThe 30L-1 is a grounded grid linear amplifier with four 811 A Triodes. AN 811-A 200-WATT GROUNDED-GRID LINEAR AMPLIFIER. The Shishido (wavac) 811A tube amp schematic In the photo above, the "kairo" modified …Prev · Next. 75 Meter, 40 Meter, 20 Meter, 15 Meter & 10 Meter Amateur Bands; TUBE COMPLIMENT. They are all rated at a kilowatt dc plate input on CW, as is the AL811H. 811A - Triode, Power Amplifier, China - Chinese 811A Available in Singles or Matched Pairs - please select from list. The Heathkit Warrior, Gonset 811 amp, and Collins 30L1 are all amps using four 811A tubes. To me, that's the first step. Product Features 811A - Triode, Power Amplifier, China. Documentation on the original Gates amp indicated that it was a 2 to 30 mHz design. We carry current production 2A3 and 300B as well as SV811 and SV572 super triode tubes. Introduction and Historical Background: After I completed the 6CL6 One Tube Transmitter, I decided that I wanted to build a matching amplifier. You might avoid replacing expensive tubes and components. Plug-in plate coil GENERAL: Type: Amateur UHF transceiver: Frequency range: 430-450 MHz: Tuning steps: 10 / 100 Hz 1 / 5 KHz: Mode: FM/SSB/CW: Channels/memory management: 35 regular eBay determines trending price through a machine-learned model of the product's sale prices within the last 90 days. Hello, In my 25 years of amateur radio, I've never owned an amplifier until now. To …MC 801 Power Amplifier's Physical Inspection Enough background talk it was now time to inspect the product and afterwards sit down in my favorite chair to listen to some of my favorite musical pieces. Selling a nice Ameritron 3 811a tubed amplifier. Kuhne Electronic; Pix Model Band/QRG Max P/O Quicknote; KU PA 2325 BLK: 2300-2450 MHz: 20 W: Drive: 15 mW: KU PA 2325 DLK: 2300-2450 MHz: 50 W: Drive: 5 W: MKU PA 231 HXL 800W Output Linear Amplifier w/ 4 811A Tubes on 100/110/120V for US Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting $918. both person use just same kind of positive grid tubes 811A , 830 ,838 , 801 etc for Transmitter . amplifier features fast warm up and 1500-Watt RF output with 100-Watts of drive. We are currently in the process of adding, “MADE IN U S A” and the American Flag, to our NOS/NIB inventory if applicable. A new 20W 811A SE amp(regulator tube drive method) was designed and built on the SL-15 chassis (frame re-used only). In fact my old friend John Weston (G3LYW) gave me an 813 to use in an amp, I built up a power supply for it but never completed the linear so I’m going to have another shot at it!This circuit is under:, audio, vacuum tubes, 811A produced by 10W tube final amplifier l59823 Characteristics of the transistor 811A to the right, when this type of pipe work there is gate current generating means, in order to effectively discharge grid current, conventFind great deals on eBay for 811a tubes. Note the . 811A Single Ended Amplifier. Top, 4-125's tank coil, caps, blower. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s. Save 811a tube to get email alerts and updates on your eBay Feed. Find great deals on eBay for 811a amplifier. Orders for 4 of this item will come as matched quads. To the people who are dealing with audio Thanks for visiting Mableaudio! We stock all kinds of amp parts you want. Features. Only the AMERITRON AL-811H gives you four fully neutralized 811A transmitting tubes. They were touted as being versatile -- connect grid 2 to grid 1 and you had a high-mu triode, connect grid 2 to the plate and you had a low-mu triode. This compact little amplifier is the brain-child of Pat Murdoch, ZL1AXB, in Auckland, New Zealand. There are many others. Unlike GE Ham News, this isn't quite a complete set of the RCA publications. very famouse amplifiers in Japan. I could go on and on, but now it is Carl's turn. Electrical Filament: Thoriated-tungsten Versions of the 572B designed for audio amplifier service are available. How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned. Ameritron AL-811X HF Amplifier, 600W, (3) 811A Tubes, 240V AC. We majored in exporting tube amplifier, guitar amplifier parts, and guitar parts. That is a HUGE differance when running high duty cycle modes. Title: 811A Author: RCA Subject: 1999. Title: RCA 811 tube data sheet Created Date: 11/18/1999 11:54:00 PMMetering the plate, screen, and grid currents of an RF amplifier is an important method of monitoring amplifier operation. How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned First they are constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot enough to melt. This is the category for directly heated triode (DHT) fans. The amplifier operates the tubes beyond tubeThe commercial and homebrew 811A amps out there have some variations that can provide some differences in detailed quoted performance parameters (drive power, plate current, grid current, power out (or power input from older times), tuning methods). Abstract: 811A NL-811A CI 7400 power amplifier 1000 watts rms 811A tube NL811 class B push pull power amplifier 811a audio amplifier 6 watts resistor Text: NATIONAL NL-811A September 1992 Page 1 The NL-811A is a three-electrode tube designed for use as a class B audio-frequency power amplifier …Find great deals on eBay for 811a tube. Prev · Next Help with searching How to get copies of articles This database contains the QST index from 1915 to the present and the QEX index from 1981 to the present. Conveniently plug it into your nearest 120 VAC outlet -- no special wiring needed. Home / Psvane Vacuum tube & Amplifiers / Matched Pair PSVANE 811A Vacuum Tube For Medical Amplifier Matched Pair PSVANE 811A Vacuum Tube For Medical Amplifier. Jan 11, 2007 • Public Typical of amplifier design today, the fan pulls air through the power supply section and blows it through the tube and plate choke group and exhaust it, and the heat, outside the box. Ameritron HF Power Amplifiers are the most popular HF amplifiers in the world! Ameritron leads the industry with time-tested designs that offer the best value for Amateur Radio operators and HF experimenters everywhere. NATIONAL NL-8 11A VK September 1992 Page 1 The NL- 811A is a three-electrode tube designed for , , the NL- 811A has a maximum plate dissipation of 65 watts (ICAS). 187. (Shishido Amplifier Skematic Amplificadores de Shishido Skematico) Only the AMERITRON AL-811H gives you four fully neutralized 811A transmitting tubes. Keep in mind that the before 1982, the FCC regulated hams according to input power, so when hams talk about a 1kW amplifierDown its own driveway, this relocated 3 bedroom weatherboard home is surrounded by well-cared for neighbouring properties making it a great starter family home or perfect for investors. Only at eHam. 85 AL-82 Chinese 811A Vacuum Tube. MC is proud to be considered as one of the world’s top manufacturers of sophisticated High End Audio HF Amplifier, 800W, (4) 811A Tubes, 240V AC Only the AMERITRON AL-811H gives you four fully neutralized 811A transmitting tubes. Please note that we are open Monday to Sunday between 8:00 Am …Tube amplifiers are a popular project among hams. I removed 2 of the 811A and tried them in the Yaesu and amp and it had good output. Some parts like rectifiers, oil cap and bleeder resistor are not included. Not much else can go wrong in amps that would not result in something you would see or smell due to the voltage and such used. Though the transmitter was mostly my work, a lot of the work was that of Jim Trutko, W8EXI, and I wanted to build a piece of equipment that was 100% my work. Use Hifi Shark to monitor pricing and global availabilityThe 811A is a power triode for RF or class B modulator service. 12/07/2011 · hi all, i am researching the feasibility of building one of these over the summer. Part Number: GB5226Hi Jim Thanks for the posting. 11-15 Harley Crescent, Condell Park · Directions811A schematics Here are some interesting schematics for the 811A tube. This is my first time to set up a homepage; My main reason is to introduce myself to you before the ETF2008 which I …This article examines the performance of the Ameritron AL-811H amplifier with the supplied 811A tubes and with 572B tubes, and details a procedure for replacement of existing tubes. 19" wide (rack mount), very heavy. Size: 4 3/4”W x 4 1/4”D x 4 3/4” H Shipping Weight: 12. NL-811A September 1992 Page 1 The NL-811A is a three-electrode tube designed for use as a class B audio-frequency power amplifier and modulator. We stand by all of our products, striving to give you the optimal sound stage environment with quality tube amplification products. The powerful spark induced scorching and inside a hole in the glass. Since September 2008 I've been working in a new project regarding a single ended triode tube power amp using the 811A vacuum tube. Resources listed under Amplifier category belongs to Amplifiers main collection, and get reviewed and rated by amateur radio operators. 811 linear amplifier. i have a set of plans for building a 2 driving 4 6LF6 tube29/08/2017 · Upgraded the 811A tubes in my AL-811 Amplifier to 572B tubes. Ameritron AL-811 product reviews by real people like you. Transistors in amplifiers commonly use one of three basic modes of connection. 00. 18 Created Date: 11/18/1999 11:54:00 PM For starters all the power for our amplifier is coming from a 120V outlet. 811a hf amplifier keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on …I always heard that the only stupid questions where the ones that you didn't ask! With that in mind, here's my situation and questions I have a Ameritron 811A amp that I really don't understand how to tuneThe Bendix/King RDR 2000 Installation Manual (006-00643-0007), on page 1-1 states: "The ART 2000 can be installed as a replacement (with a connector change) for the RS 181A or the RS 811A in an existing RDS 81 or RDS 82 installation. As I remember, the Collins 30L-1 amplifier had four (4) 811A's in it and was rated at 500 watts, a pretty honest rating. both person use just same kind of positive grid tubes 811A , 830 ,838 , …The 811A is a power triode for RF or class B modulator service. The 801 amplifier and 601 preamplifier combined the richness and depth of tube magic with the majestic power of solid state audio gear without using tubes or a hybrid design. The 811A's are instantly heated; thus, there is no delay in warm-up. Decoupling capacitor of the first voltage amplifier is of oil paper condenser(4 micro F /400V) with which a smooth and clear sound have been obtained. Listings updated every 30 minutes. 5kV for the anode and the filament needs 10v at 5 Amp so we are going to need a BIG transformer. Services: Reconing, Re-Edging, Magnet Re-Alignment, Cone Coating Treatment11-15 Harley Crescent, Condell Park · DirectionsThis is the 811A. New refers to a brand-new, unused, unopened, undamaged item, while Used refers to an item that has been used previously. The actual working dissipation If your amplifier has gas clamp tubes installed, and if they are firing, there is an China Kt88-98/5881A/811A Vacuum Tube, Find details about China Audio Valve, Audio Tube from Kt88-98/5881A/811A Vacuum Tube - Sunflower Representations The AL-811H is a grounded grid linear amplifier developed by Ameritron using low cost 811A power triodes. net. T. At Jolida we strive to provide our customers with premium vacuum tube home electronics for every sound stage. Tuning the antenna can be done with running the radio barefoot. This 811A is out of a matched set of 4 that served in a power amplifier for over 15 years. amplifier. A three (3) tube amplifier could run 366 watts output and a four (4) tube amplifier could run 488 watts output, assuming 65% plate efficiency in both cases. " The handbook itself states that: "If the amplifier is to be greatly overloaded, a filament voltage slightly higher than the rated value will give greater tube life. Ideal for sweep tube, or three 811A amplifier. 2 AL-811 LINEAR AMPLIFIER FEATURES The AL-811 is a grounded grid linear amplifier developed by Ameritron using low cost 811A power triodes. 6CL6 One-Tube Transmitter and 6146B Amplifier: In this photo you can see the 6CL6 transmitter on the left and the finished amplifier on the right. au/Amplifier/RepairAdProfessional Amplifier Repair Services In Sydney. Help with searching How to get copies of articles This database contains the QST index from 1915 to the present and the QEX index from 1981 to the present. In most respects it is a typical grounded grid linear amplifier, with the exception of a rather unique tuned cathode input circuit that was developed by The filament voltage should be increased gradually to maintain output. In Section IV of Service Tips for the 30L-1 811A amplifier (by Collins), there is important information regarding the filament fuse: "The filament circuit on the 30L-1 is fused by a length of number 30 wire in the center tap ground return of the filament winding on T1. Replacement valve Ameritron 811A-40250. Despite being relative low powered, 2A3 still is the triode of choice for many high end audio amplifiers and DIY projects 5/04/2007 · When I first saw the schematic of a 811A P-P audio amp, I was astonished to find not a single resistor or capacitor in the circuit. P. Ganti's 811-A class A2 amplifier. One of these tubes is capable of producing as high as 3000 watts of output power. This amplifier without modifications will allow to use the GM70 and the 813 (FU-13) output tubes. I have 4 RF Parts Taylor 811a tubes with boxes. com/Stereo amplifiers for home/Be quickAdSearch no more. 99 $ 79 99. RCA Ham Tips. " The ARB-704 interfaces the transceiver amplifier keying line to any amplifier without making a direct connection that could be damaging to the transceiver. 70 cm, 2 or 6 meters. AdNeed to Hire an Amp? Call Us for a Wide Selection of Modern Equipment!Models: Crown XTI 2002, AM1200 Power Amplifier, Crown XTI 4000Stereo amplifiers for home | Search info on Pronto. Ameritron AL-811H tube selection - This article examines the performance of the Ameritron AL-811H amplifier with the supplied 811A tubes and with 572B tubes, and details a procedure for replacement of existing tubes. Dual-grid tubes were popular for a short while. This is possible if the amplifier keying circuit operates at a voltage or current that is too high for the transceiver circuit, or if there is a malfunction pulse. BTW, your posts on low powered 845 inspired me …5/04/2015 · Rick I have been working on old Yaesu FL2000B amp it had low output and I purchased a AL-811H amp the Yaesu uses 2 572B tubes which are a HD version of the 811A. Bill, A much better way to deal with your 811a amplifier would be to ground the tube grids with a low inductive straps, have a relay in the filament center tap with a large value resistor >50k in series. 1 The Pleasures and Pitfalls of Owning a Linear Amplifier by Dave Barber --K5NDB Ross Lawler --W5HFF Rick Hiller --W5RH April 8, 2010 Brazos Valley Amateur Radio Club Far superior in construction most other 811A/572B amplifiers on the market today. How it did so baffled me but surely it must be found in the engineering. How To Build The DX-811A All-Band Linear Amplifier CQ Magazine September 1982 BY F. + Medical amplifier with a noble voice 811A FU-811 FU811J tube PSVANE. SV811-3 is a power tube developed by Svetlana, Russia basing on the transmitting tube 811A. - eHam. Model: AL-811: Date: Category: Radio, Communication: Group: Amplifier: Description: Linear Amplifier: Information: The AL-811 is a grounded grid linear Amplifier developed by Ameritron using low cost 811A power triodes. 812 Tube The 812 was a moderately low mu tube, primarily intended for grid driven modulatorSET direct heated triode tube power amp. 2A3 / 300B / 811 / 572. Hot search: Amplifier DAC Transformer Tube Advanced . The Shishido (wavac) 811A tube amp schematic In the photo above, the "kairo" modified schematic and Ganti's schematic in the photos below: We work out the trending price by crunching the data on the product’s sale price over the last 90 days. Get 'em while they last. The output of the 811A is connected to the load through a high-quality air-gapped transformer that provides 4, 8, and 16-ohm taps. Shenzhen Mable Audio, We are a professional Amplifier parts manufacturer and exporter located at Shenzhen city of China, has established in 2005. 811a amplifierAmeritron Al-811 linear amplifier gives you plenty power to bust thru QRM. I have an Ameritron 811A amplifier. operation at more than 1,000V or Grounded-grid linear Amplifire service. RoHS Compliant. HF amplifiers for ham radio use. AMERITRON AL-811 Linear Amplifier 3 x 811A Tubes HF 600 Watts PEP. Get a load of the huge BASLER hypersil transformer. In normal use, and careful loading, your tubes will last a long long time. pronto. Collins Radio guru, Dennis Brothers, WA0CBK, details the operation and safety updates and discusses the 811A triode. Heavy duty power supply and RF components provide long service for components. 500w Hf Linear Amplifier Circuit Diagram Wiring L32720. 13806 Parkland Drive, Rockville, MD 16 Aug 2012The 3 and 4 tube Ameritron amps that use 811A tubes are very popular. www. Sold separately or with RF decks. The driver tube must be capable of driving a low impedance. A wide variety of 811a tubes options are available to you, such as professional amplifier, home amplifier. Such as tubes,tube sockets,capacitors,resistors,tag board,meter,pot,knob,feet,chassis and so on to get you started. Single-Ended RF Amplifier Circuit from 1930's (750 Watts) Chapter from the Radio Handbook of, apparently, the 1930's; "Medium and High Power RF Amplifiers" (See end of chapter for this amplifier) 100+ Watts Find More Amplifier Information about 1PC New Psvane Tube 811A HIFI Tube 4PINS Electron Tube Free Shipping,High Quality hifi tube,China tube 811a Suppliers, Cheap psvane tube from VIC Audio-HiFi on Aliexpress. The comeback of the tube amplifier as told by Rick Rosen of Stereophile is not a matter of nostalgia; it is a matter of excellent sound reproduction. $59. Buy low price, high quality tube 811a with worldwide shipping on AliExpress. Sridhar "Ganti" Gantimahapatruni wanted a bit more power than the Randall gave, plus wanted to experience the "big sound" of directly-heated transmitting tubes. This is the LAST of the US made Title: RCA 811 tube data sheet Created Date: 11/18/1999 11:54:00 PM 組みあがりましたので 誤動作検出のテストをしてみました。 まずは、ft817 にて 軽く動かしてみました。 組みあがりましたので 誤動作検出のテストをしてみました。 まずは、ft817 にて 軽く動かしてみました。 Many amateur amplifier designs around this beauty. 95 * Buy It How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned First they're constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot enough to melt. Going up the list of tubes, the 3CX1500 / 8877 tube is a very rugged tube but very expensive. The AL-811H is a grounded grid linear Amplifier developed by Ameritron using low cost 811A power triodes. The AL-811H ventilation system has been designed and tested to maintain the 811A tube temperature safely below the tube manufacturer's rating at 500 watts output with a 100% duty cycle. com View 811A datasheet online at HeberTech. Refurbished 600W Linear amplifier, 3x 811A The first 600 watts make the difference The Al-811 gives you 600 watts PEP output -- thats nearly 2 full S-units over your barefoot rig. To insure proper ventilation in your installation, observe the following: 1. they are build up these amplifier early 90'. This is a very beautiful tube having a brightly shining thoriated-tungsten filament with plain plate encapsulated in a large-size perfectly transparent glass tube without getter. 2 AL-811H LINEAR AMPLIFIER FEATURES The AL-811H is a grounded grid linear amplifier developed by Ameritron using low cost 811A power triodes. Radio tubes are valves. Simply plug your amplifier power cord into the Ameritron Inrush Current Protector. This model PA150 amplifier has outstanding performance in its class and represents truly exception value for money. A large number of users experience short tube life and wonder why? Lets examine that Since September 2008 I've been working in a new project regarding a single ended triode tube power amp using the 811A vacuum tube. First up for inspection was the MC801. How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned First they're constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot enough to melt. power output tubes for audio, guitar amps, radio 572b and 811a tubes in stock! open this section for all popular power output tubes for audio, guitar amps and general amplifer service. com). You get absolute stability and superb performance on higher bands that can't be matched by un-neutralized tubes. 0 products in your cart, total amount $0. The 813’s need about 2. About 11% of these are amplifier, 2% are electric pipe threader, and 1% are quartz tubes. The 813 is a general-purpose transmitting beam power tube with thoriated-tungsten filament with a maximum plate dissipation of 125 watts. WAVAC 811a 15 watt DHT amplifier. Double garaging as well as plenty of off street parking and go25/05/2017 · Grid current on the AL-811A can NOT exceed 200 ma or the tubes will be destroyed in short order. Four 811A Tubes: Uses four rugged, fully Find great deals on eBay for 811a tube. MARCELLINO, W3BYM 13806 Parkland Drive, Rockville, MD 20853SET direct heated triode tube power amp. they are build up these amplifier early 90'. Push-pull class-A amps are most often cathode-biased , but many hi-fi amps are fixed-biased . 110 VAC. Same for the 812A. 3 of the tubes have less than 1 hour of transmitting. Please Log In or Sign Up to leave a review of this product. The initial intention was for the linear amplifier unit to have the same dimensions as the transceiver unit. An 811A is a very high mu triode. Indicating devices on the 30L-1 include a panel meter monitoring final amplifier plate current, plate voltage, and tuning circuit. The charts give thetypical voltage output (Eo) and Voltage Gain (VG) you can expectwith the B+ (HT) supply (Ebb), plate load (Rp), cathode Building a large power amplifier is really two projects in one, the power supply and the amp itself. Only that Ameritron AL 811H you gives 4 tubes neutral 811A. A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. The 30L-1 is a grounded grid linear amplifier with four 811 A Triodes. Two tubes, input and output transformers, and connections to a6CL6 One-Tube Transmitter and 6146B Amplifier: In this photo you can see the 6CL6 transmitter on the left and the finished amplifier on the right. Pair Psvane 811A Audio Valve Vacuum Tube Instead of 811A 811 FU-811 New 1 Matched Pair Vacuum Power Vacuum Tube PSVANE 811A 811 FOR tube amplifier by PsvaneThis is the 811A. See Information in another article about how glass tubes are cooled. How do 811A tubes resist premature failure if your amplifier is mistuned? First, they're constructed with widely spaced elements that minimize the chance of touching and causing a short, even if the plate gets hot enough to melt. 95 USD. Find High Power Rf Amplifier Today!AdGood Price on Professional Stereo Power Amplifier Supplier Trusted, Audited China Suppliers. The Ameritron AL-811H is similar to the AL-811, but with four fully neutralized 811A transmitting tubes for 800 watts of power. Three tough 811A transmitting tubes, extra heavy duty power supply, all HF band 200-Watt Linear. AMERITRON AL-811 Linear Amplifier 3 x 811A Tubes HF 600 Watts PEP. Hi Jim Thanks for the posting. Delivery and packaging was also prompt and efficient. 2. I have some nos 811A tubes and a [email protected] This 48" cabinet has empty area as pictured for exciter, originally to be an SR-380. com ✓ FREE DELIVERY possible on eligible purchases. August 21, 2018 - Most of our Vintage electronic parts and equipment was manufactured in the USA. This 120-watt amplifier, at eight ohms/185-watts at four ohms, stands only 5. 00 each All information, images, and documents on this website are the sole property of Ameritron Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Ameritron Chinese 811A Available in Singles or Matched Pairs - please select from list. However this amp isn't designed for big power. Alibaba. Since it only needs a few volts of drive the grid is always positive and the transition never happens. Ameritron AL-811 Amplifier manufactured in late 2013 and extremely clean inside and out – tubes show full output on all bands – comes with original factory double box set. Ameritron AL-811h Linear Amplifier. It is only 11″ wide, 4″ high, and 9″ deep. HF POWER LINEAR AMPLIFIER INSTRUCTION MANUAL The Ameritron AL-811H is an economical 800 watt PEP output linear amplifier that operates reliably from 160 through15 meters. All in all the AL-811 is a good amplifier for the money. Mini 200w Hf Power Amplifier Shortwave Power Amplifier Assembling Needed Sz-Collins 30l1 With (4 New Taylor 811a Tubes ) & New Electrolytics . Flashover in a tube of an unprotected RF amplifier. by Steel Dragon Tools. PSVANE 811A VACUUM TUBE Replace 811 FU811 for HIFI AUDIO AMP DIY Matched 1pairAmeritron AL-811 product reviews by real people like you. 811A - Power Triode Tube, Filetype: PDF. A Dedication to Performance To carry on our MC power amplifier sucesses as such 701, 801, 811 and 811a mono block. 59 USD. This is the very best way to get into the legendary Wavac lineup and will provide tremendous sonics at a very reasona "published rating" of 811A anode dissipation. Tube amplifiers are a popular project among hams. This RCA 811A SE Amp operates in an A2 class at 600V, 80mA (no signal) with applied amplifier, two 3-500z, $3,095. 811A datasheet, 811A circuit, 811A data sheet : ETC2 - POWER TRIODE ,alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Uses 4 811A tubes but this one has the heavier duty 572B's instead. Rick I have been working on old Yaesu FL2000B amp it had low output and I purchased a AL-811H amp the Yaesu uses 2 572B tubes which are a HD version of the 811A. By limiting heavy inrush current to safe low level, youll get a longer lasting amplifier. An 811A with 500 volts on the plate will draw 80 mA with +20 volts of grid bias. The amplifier shown in Figs. The amplifiers serial number is 17831. Went back to 811a's and added an external The 811A vacuum tube it is a power triode capable to output 10 - 15 Watts in a single ended class A2 configuration, in a three stages circuit using interstage transformer in the driving stage. 378 likes. 7KRelated Searches for 811a amplifier811a amplifier project811a hf amplifier811 tube amplifier811a linear amplifier811a audio amplifier811a tube ameritronameritron 811h no output power811a vacuum tubeAmplifier Repair | Over 30 Years Experiencehttp://www. amplifier. Individually priced, orders for 2 of these will come as matched pairs. Others, using potentially damaging horizontal mounting, require hard-to-find 811A tubes to retard harmful sagging and shorting. com. Please don't hesitate to contact us with any queries or comments about our items or your problem. 87. If someone has another source, let me know. You get absolute stability and superb performance on higher bands that can’t be matched by un-neutralized tubes. The best prices of 811a penta laboratories and relevant items. A complete guide to the 30L-1 amplifier. 19/02/2016 · For some reason, I seem to have become a little obsessed with 811A tubes whilst playing around with an Ameritron AL-811 Amplifier. The amplifier operates the tubes beyond tubePlease Log In or Sign Up to leave a review of this product. These items are not available for export