[Boatanchors] VFO Circuit using Space Charge Tube?

[Ian Wilson]

Some interesting findings (for submini tubes) here:
http://g4oep.atspace.com/xfy/xfy.htm

73, ian K3IMW

On 9/30/08, kd4e <doc at kd4e.com> wrote:
> Anyone have a good VFO circuit for a HF transmitter
> that uses a "Space Charge" or other 12vdc tube?
>
> I did a bunch of online research on Space Charge tubes,
> pencil tubes, and low voltage subminiature tubes.
>
> The closest thing was this 12vdc tube QRP transmitter
> using a 12AC6 crystal oscillator and a 12J8 buffer
> http://ja9ttt.homedns.org/hamf/myexp/12V_Tube_QRPp_Transmitter.html
>
> The Japanese-to-English translation is rough but from
> the schematic and text does anyone see any reason that
> this could not be converted to a multi-band HF VFO?
>
> Here are the other low-voltage tube links that I found:
> http://kd4e.com/pp.html
>
> --
>
> Thanks! & 73, doc, KD4E
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