Vic K2VCO wrote:
> kenw2dtc wrote:
>> "I've never understood the raison d'etre for the introduction of the 572B.
>> I gather it was meant as a cheap SSB tube"
>>
>> Perhaps this tech bulletin from 1964 will explain:
>>
>> http://w2dtc.com/1964-waters-tech-bulletin.jpg
>
> This is very interesting, because it contradicts what I've believed:
> that the 572B offers no additional power output over the 811A unless you
> raise the plate voltage. But this bulletin says that simply plugging
> them into a 30L1 and increasing drive will increase power output by 33%.
> What's the truth here?
I take it back. That's 33% *without* increasing drive. It's 75% if you
increase drive!
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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