572b vs 811a

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  • filament in all 811 amps and 572B amps. This is because of production inconsistencies (variations) in 811A tubes. We can reasonably assume 572B tubes, since they use the same grid assembly and filament, also have this problem. Resistor Value and Power. Worse case peak RF cathode voltage is 100 volts. Typically, at full drive,
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  • Ameritron AL-811h Linear Amplifier. Uses 4 811A tubes but this one has the heavier duty 572B's instead. The 572B is just a more rugged version of the 572B is a powerful direct heated triode for class A2 / AB2 enthusiasts. Easy to get 80 watts with true power triodes. 572B is compatible with 811A.
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  • Three tough 811A transmitting tubes, extra heavy duty power supply, all HF band coverage, pressurized ventilation, tuned input, dual illuminated meters, adjustable ALC & more. The first 600 watts make the difference The Al-811 gives you 600 watts PEP output -- that's nearly 2 full S-units over your barefoot rig.
  • f4aa932b-2fd5-4540-811a-5cad01e91723.jpg|d6a24bc4-13b0-4dbf-a123-064061deeeed.jpg|065cd790-892e-4504-994e-391755bd04f2.jpg|68fcd472-9741-43de-9425-d48620d07b20.jpg|a0f9ccce-b3f8-4f1c-97f2-557a421d0f0e.jpg EN LA PARED DE LA MISCELÁNEA MARTITA FRENTE A LA IGLESIA DE HUIMILPAN, QUERÉTARO. AVENIDA REFORMA
  • (This problem is common with grounded grid amplifiers using 572B's like the Dentron Clipperton L, or quads of 811A's, like the Collins 30L1. Yaesu has this problem is some FL2100's.) While a need to neutralize does occur in some HF grounded grid amplifiers, it is more common in very high gain grid-driven amplifiers.
  • Mar 11, 2008 · I just fried a triplet of 811a's, trying to tune it up at about 28 MHz. The plates on those 811's glowed, too. I can tell, because they had melted spots where the gettering material was burned off. I replace them with 572b tubes that are quite similar but have graphite plates that won't melt at gettering temperatures.
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  • 572B 805(FU-5) GL-805 807(FU-7J) UY-807 811(FU-811) 811A 845B UY-845 Rectifier 274B 5Z3P and 5Z3PA 5Z3PAT(5Z3P) 5U4G and CV841 Compactron 12AX7B(12AX7) 12AX7A, 7025 and ECC83 12AT7 GT-12AT7, 6021 and ECC81 12AU7 5814, 6189 and ECC82 6N1 6922 and 6DJ8 6N2
  • Title: RCA 811 tube data sheet Created Date: 11/18/1999 11:54:00 PM
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New hampshire moose lotteryWe burn-in, test, and match all of our Penta tubes. Read our reviews or we'll help you with a recommendation. Free shipping on orders $105 and over. Call now! 516-314-0357. Main Electronic Supplies Ltd 4554 Main Street Vancouver Bc V5V 3R5 604-872-0267 Fax 604-872-0268 [email protected][email protected]
Ameritron AL-811h Linear Amplifier. Uses 4 811A tubes but this one has the heavier duty 572B's instead. The 572B is just a more rugged version of the 572B is a powerful direct heated triode for class A2 / AB2 enthusiasts. Easy to get 80 watts with true power triodes. 572B is compatible with 811A.
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  • So it's the same transformer. Which brings me back to my original question about running three 572B's in an AL-811 vs. an AL-811H. If the power supply is the same, and if the AL-811H can drive three 572B tubes to 800 watts output (fourth hole empty, as recommended by W8JI), then why can't the AL-811 do the same?
  • 572B Cetron: New old stock, some in original box. This is a very heavy duty transmitter tube that is impossible to find anymore. These have been tested at full operating voltage and produce full rated power output. PAIRS ARE $250.00. $125.00: in stock: 801A, ST Shape, RCA 1941/1942 dated,MATCHED PAIR. rare. NOS, in original box.
  • Forum: Discussioni: Messaggi: Ultimo Messaggio Discussioni : A.R.I. - LA NOSTRA ASSOCIAZIONE Iniziative ed attivita' delle Sezioni ARI. Ultima Discussione: RADIOAMATORI IN DIRETTA..

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Get the best deals on 572b tubes when you shop the largest online selection at eBay.com. Free ... 811A / 572B . $5.00. Free shipping. Only 1 left! Results Pagination ...
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Visita eBay per trovare una vasta selezione di {572b tubes}. Scopri le migliori offerte, subito a casa, in tutta sicurezza. 572B Penta Labs abbinato COPPIA (2) tubi CB HAM RADIO 3B28 811A.
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Ameritron AL-811h Linear Amplifier. Uses 4 811A tubes but this one has the heavier duty 572B's instead. The 572B is just a more rugged version of the 811a's. However this amp isn't designed for big power. It has an adequate power supply and won't do more with the 572B's but will run cooler and last longer with them. This has had the 10-12 meter mod which is just opening the back access cover ... Psvane 811A / 812A / 572B vacuum tube (single). These three models of tubes, 811A, 812A, 572B are mostly used in medical field, in specialized equipment. They come with top cap but connecting ceramic cap & cable is not included. If you have equipment using this type of tubes, More Info ».
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ANY HAM RADIO HF AMP PROJECT (USING 811A or 572B TUBES) $0 (sfo > SF BAY AREA OR ANYWHERE CLOSE) pic hide this posting restore restore this posting. $0. favorite this ...
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  • The TAYLOR Select 811A is the best quality tube in current production. Usage tests show it to be equal to the respected RCA 811A and Svetlana 811A. Base indexed and internal structure aligned and supported for both horizontal and vertical operation. Ideal for the Collins 30L1 and similar equipment where tubes mount horizontal.
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  • One of my sweetest sounds was an 811a or 572b can't remember exactly any longer, as a spud power amplifier. Had to be very close to speakers but the hair stood up on my neck. I am really interested that the transformers had a degrading effect, and nobody would dare criticise those transformers.
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  • The following list shows the tube types I have entered in my database, with exception of the service types (e.g. VT100, CV124). You can use the search to find service types or go to the service type lists that you can access from the page More Tube Related Stuff.
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  • D-101 AC 29.811A Emergency Exit ... B-22 AC 29.45-3 Shaft Horsepower vs. Turbine ... Spine Load Cell in C-70 Part 572B Anthropomorphic Dummy AC 29.562-5 ...
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  • 811A Tube History and Construction . Power Gain of AL811H Amplifier. The older AL811H (prior to drive resistor modification) with good tubes and stable power line, when properly tuned and operating in the linear region, has about 11 dB gain. This is an amplification of about twelve times. With 60 watts of drive power, output is 720 watts.
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