In my estimation, it's not worth the effort, as those OLD tubes are
probably quite 'gassy' from sitting around for so long.
Good luck!
Don
N8DE
Quoting Edward Swynar <gswynar@durham.net>:
> Good Day All,
>
> A good Ham radio friend of mine recently blessed me with a donation
> of three Heintz & Kaufmann 304H triodes (a near-carbon copy of the
> Eimac 304TH, according to Lud Sibley)...
>
> Has anyone ever had any significant experience working with these
> old-timers...? I've seen a circuit in Orr's handbooks, where a pair
> of them were pressed into service as the p-p class-B final audio
> amplifier stage of a legal limit AM modulator---but only one single
> example in its use as a single-ended RF linear amplifier, in a 1954
> CQ book on SSB techniques...
>
> I think it has distinct possibilities for a low-band kilowatt-plus
> design---can anyone share their experiences in this regard with me...?
>
> Thanks in advance, & my vy
>
> ~73!~ Eddy VE3CUI - VE3XZ
>
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>
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