>
>When the G2DAF circuit was first published (in the old RSGB 'Bulletin'),
>there was a degree of vituperative correspondance, with some people claiming
>that Dick's signal was poor, and others saying it was good! G6JP did some
>analysis (he was a professional in tube manufacturing at the M-O Valve
>company, where the original KT66 came from) and was very dubious.
>
>I would expect the performance on 2 tone test to be very critically
>dependent upon the time constant in the rectifier filter for the screen
>grid.
However, in a typical 2-tone test, the frequencies are c. 1000Hz apart,
which essentially eliminates the time constant of the screen supply
filter as a factor.
>......
- later, Peter
Rich. Measures. Web site: www.vcnet.com/measures
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