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811A Single End Class A2 Audio Amplifier – GeeSeang's ...
https://geeseang.wordpress.com/811a-single-end-class-a2-audio-amplifier/
811A is a high mu triode transmitter tube design for Class B push pull amplifier in audio and RF . In order to run into class A single end it must bias in …
811 811A Amplifier | diyAudio
https://www.diyaudio.com/community/threads/811-811a-amplifier.354865/
The 811 is a pretty looking tube. But you are not going to be able to use RC coupling. Either DC coupled to the 811, or use an interstage. 811 Mu is extremely high, but the plate resistance is extremely high too. 811 is suited for Class C RF amplifiers. 811 is suited for audio class B amplifiers with negative feedback.
homebrew 811A amplifier project | WorldwideDX Radio …
https://www.worldwidedx.com/threads/homebrew-811a-amplifier-project.34449/
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). The 572b tube is the beefed-up RF version of the 811a and, it fits in the same tube socket and has the same voltage and current requirements.
An 811-A 200 Watt Grounded Grid Linear Amplifier
http://www.qro.it/amp/schemi/pdf/68hb187.pdf
This compact amplifier uses an 811-A and a simple 1300-volt power supply. To simplify construction, two bandswitches are used (input at lower left, plate at upper right). The single meter can be switched to read either grid or plate current. 200-Watt Linear aluminum cover.
How To Build The DX-811A All-Band Linear Amplifier CQ ...
http://www.813am.qsl.br/artigos/linear/DX-811A_GG_Linear_Amplifier.pdf
The driving power into each of these amplifiers ranges between 60 and 80 watts, depending upon the band used. Typical values required to produce 600 watts output from the DX-811A are grid current of 120 ma, plate current of 750 ma, and a loaded plate voltage of about 1450 VDC. The plate voltage drops about 100 VDC from zero to full load.
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