[Boatanchors] Need help identifying oscillator circuit

[Ian Wilson]

Sounds like a Vackar. I guess the output is being taken from the screen to
provide some decoupling from the plate circuit.

E.g.: http://www.w7ekb.com/glowbugs/VFOs/vackar_vfo.html

73, ian K3IMW


On Mon, Aug 8, 2016 at 11:42 AM, Charlie Cheney <ccheney3686 at charter.net>
wrote:

> Some time back I picked up a homebrew VFO front end (1.75-2.0 MHz).
> Mechanical construction is excellent, clearly shows pride of workmanship,
> but it would only work for a few minutes before it stopped oscillating.
> I've fixed that but in the process drew out the schematic and I can't
> identify the circuit. It's similar to a series tuned Colpitts but the
> output is taken from the screen (of a 6AU6), not the plate, and the cathode
> and center of the capacitive divider are grounded. I'd appreciate any help
> in putting a name to this circuit (and a reference to a design description
> would be even better).
>
> Thanks in advance,
>
> 73,
>
> Charlie K1LDZ
>
>
>
>
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