On Wed, 26 Oct 2005, Mike Schatzberg wrote:
> My old SB 220, which I have to admit I have heavily modified, and uses
> Chinese Graphite Donut Triodes, does about 1100 PEP, sending a string of
> dits at about 35 wpm, with only one tube installed. The Amp really
> loafs along at 1.5 KW with about 80 watts of drive. I don't have enough
> power supply to get more than about 1,700 to 1,800 PEP into a dummy load
> with both triodes. I doubt that the components would like it very much
> anyway.
Dang - must be long grain graphite in those tubes. I get about 1100W PEP
steady carrier with my L4, albeit with 3-400Z tubes that are nearly 40
years old, envelope glass browned with use.
73 Jason N1SU
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