[Elecraft] K3: 630m amplifiers

[Don Wilhelm]

Phil,

That is correct, and the keying of that output stage was shaped in many 
cases.
Grid-block keying was all the rage for help in shaping the keying envelope.
Cathode keying was used too, but usually not with keying.  You had to be 
careful the key did not "bite" from the voltage on it.

73,
Don W3FPR

On 7/27/2015 4:27 PM, Phil Wheeler wrote:
> I'd have to dig out my old circuit diagrams, but it seems like when we 
> used Class C amps "back in the day" (1950's and 60s) we keyed the 
> output stage, not only the driver as with linear amps -- and we 
> modulated the output stage in the AM days, too.
>
> 73, Phil W7OX
>