[EICO] Homebrewing a VFO for an Eico 720

[shoppa_eico at trailing-edge.com]

Richard Brunner <rbrunner at gis.net> wrote:
> shoppa_eico at trailing-edge.com wrote:
> .... Is it better to start with a 3.5Mc VFO and double it up inside
> > the 720 to 7.0 Mc? ....
>
> Yes, it is always better to have the vfo NOT on the output frequency to 
> obviate rf feedback.

Good idea. I ended up taking a plate-tuned Hartley from an old handbook,
building it with a 6AH6 and a 1.75Mc grid tank and a 3.5Mc plate tank,
then a 6C4 buffer, all powered via a new Allied transformer (250VCT
and 6.3V windings).

Works great on the bench! And even used it for a 40M QSO with the
Azores this afternoon via the Eico 720. Gotta put it together with
my old Millen dial and in a nice metal box, then I'm set to go!

Tim.