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813 verses four 807 valves for mitters

4:59

813 linear amplifier

3:54

Roller inductor making

19:17

DC Heater Supply for Valve Power Amplifiers

5:02

ZETAGI BV-603, 27 Mhz - TUBE RF AMPLIFIER REPAIR - POWER TEST.

43:52

Le préampli à 25 000 £ qui a mal tourné Tom Evans Mastergroove SR mkIII RE-UPLOAD. Réparez-le Mark

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(3 of 3) RCA 833A Triode 20 Meter SSB Amplifier Update

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Making A Linear Amp Plate Choke On A Chinese Coil Winding Machine