[EICO] Homebrewing a VFO for an Eico 720

[shoppa_eico at trailing-edge.com]

I had hung a 40 meter dipole between two trees when the leaves came down,
and today I finally got to using it with my Eico 720 and the few 40M
crystals I had. Several good QSO's to the Midwest resulted! Zero complaints
about rasp or chirp, I'm guessing that what I hear from a few feet away
isn't what I sound like from a thousand miles away :-). 

Well, I've got some chassis and dials and capacitors lying about, so
I decided to homebrew a VFO. I grabbed the 722 schematics and it looks
to me like a simplified, non-bandswitching version should do fine. I'm
guessing that 5 or 10V out of the VFO should be OK.

Is it better to start with a 3.5Mc VFO and double it up inside
the 720 to 7.0 Mc? I've doubled up my 7Mc crystals to 14Mc with some
success. It seems to me there is plenty of gain before the 6146's
grid to generate about any harmonic I want, but someone here can tell
me what's wrong with this idea and I'll listen.

Tim.