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G6Tanuki · 10th Jun 2018, 2:01 pm

I remember seeing some PL36s used with a hunky transformer as a DC-to-AC inverter (for those people who still had DC mains but needed to run AC-only radios/tape-recorders/tellies) They're beefy and work well as output-valves. Not seen them used single-ended, push-pull AB2 is definitely an option though! I've also seen them used as RF linear-amplifiers.

50L6 is a power-output bottle but nowhere near as beefy as a 6L6; it's probably closer to a 6V6. Commonly used in US 'midget' radios with series heater-strings.

CBL31 was intended for cheap superhets: the diodes are for detector/AVC and the pentode-bit is a relatively-high-slope one so it can be driven directly from the detector.

10th Jun 2018, 2:01 pm	#2
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,996	Re: Mystery suitcase & unknown chassis I remember seeing some PL36s used with a hunky transformer as a DC-to-AC inverter (for those people who still had DC mains but needed to run AC-only radios/tape-recorders/tellies) They're beefy and work well as output-valves. Not seen them used single-ended, push-pull AB2 is definitely an option though! I've also seen them used as RF linear-amplifiers. 50L6 is a power-output bottle but nowhere near as beefy as a 6L6; it's probably closer to a 6V6. Commonly used in US 'midget' radios with series heater-strings. CBL31 was intended for cheap superhets: the diodes are for detector/AVC and the pentode-bit is a relatively-high-slope one so it can be driven directly from the detector.