813 Tube Amplifier Schematic. The supplied 813 s are obviously chinese made but this radio broadcasting tube was popular worldwide in the 50 s and is available as nos from many many brands. 813 data sheet 1 includes the base diagram general specifications and data for use as an af power amplifier and modulator 813 data sheet 2 includes data for use as a plate modulated push pull rf power amplifier and as an rf power amplifier and oscillator.
Dynaco St 70 7199 El34pp Valve Amplifier Electronic Schematics Amplifier from br.pinterest.com
The overall layout and architecture are very similar to the hb 600 linear. As you can see this is a typical 813 amplifier schematic with the exception of the input circuit. 6 69 through 6 72 show the circuit and photographs of an 813 amplifier designed for c w a m or s s b.
After much thought the decision was made to use a single 813 beam power tube wired in the not so famous g2daf configuration.
It uses a single pentode as the driver a 12hg7 video amp tube and a solid state power supply with a microprocessor controller. L1 is actually two coils in series. Provision has been made for convenient changing from one mode to an other as well as to any of the bands from 80 through 10 meters. 6 69 through 6 72 show the circuit and photographs of an 813 amplifier designed for c w a m or s s b.
