[Amps] 572B grid

[Vic K2VCO]

kenw2dtc wrote:
> "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"
> 
> Good question.  I've included the Waters spec on the tube:
> 
> http://w2dtc.com/1964-waters-572b-spec.jpg
> 
> Perhaps the original Waters tube is different than the current versions 
> on the market?

The mu of the Waters tube is 190 compared to 160 for the 811A.  This is 
what they must mean by 'higher power sensitivity'.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco