12-11-2017, 12:49 AM
Russ;
I guess you were speaking about the 3S4 verses the 3V4 rather then a 6C4 verses a 6S4 when you were speaking about plate and screen voltage limits. Now that you mention it the 3S4 seems to have been the output tube of choice in various "personal" type radios of the 1940s, the very kind that would employ a 67-1/2 "B" battery, such as a G.E model 140, it would probably be fine as a detector or RF amp, depending on the set. It seems that the 6S4 was used a vertical deflection amp in some TV sets, filament current 600 ma, so nobody bother with that one as a 01A substitute.
Regards
Arran
I guess you were speaking about the 3S4 verses the 3V4 rather then a 6C4 verses a 6S4 when you were speaking about plate and screen voltage limits. Now that you mention it the 3S4 seems to have been the output tube of choice in various "personal" type radios of the 1940s, the very kind that would employ a 67-1/2 "B" battery, such as a G.E model 140, it would probably be fine as a detector or RF amp, depending on the set. It seems that the 6S4 was used a vertical deflection amp in some TV sets, filament current 600 ma, so nobody bother with that one as a 01A substitute.
Regards
Arran
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