[Elecraft] OT: The Colpitts mystery

[Victor Rosenthal 4X6GP]

Mine was the push-pull triode RF amplifier (not "linear"!), making sure 
to show the neutralization circuit. They didn't want any high-powered 
self-excited oscillators on the bands!

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 27/04/2020 21:03, Fred Jensen wrote:
> What was it with the FCC and the Colpitts oscillator schematic on the 
> exams in the 50's/early 60's?  It was on my General ['54] and Extra 
> ['56] exams, and practically everyone else I've asked says it was on 
> theirs too.  There are other oscillator circuits of the day.  Colpitts 
> uses capacitive feedback which is somewhat more stable than a Hartley 
> with its "Tickler Coil," but the FCC seemed fixated on the Colpitts for 
> some reason.  The schematic and operation of a dual-triode 1-shot was 
> also popular.
> 
> 73,
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
> On 4/26/2020 7:28 PM, N4ZR wrote:
>> As for the licensing tests, did you have to draw a Colpitts 
>> oscillator? IIRC, that was on my General exam in 1955.