That's exactly what I was doing today: looking at the QF-1 schematic to
see if it could be done with FET's. That Q-multiplier from the 1958
Handbook sounds like the same one that I built from the 1964 Handbook. I
don't have the schematic anymore, but I still have the parts in the junk
box. Anybody have a 1958 or 1964 Handbook?
73,
Bob WB2VUF
Ralph Matheny wrote:
There is a one-transistor Q mult circuit back in the 1958!!!!! ARRL
handbook I think. I'm not sure how well it worked, and as I remember
it was intended to be a "notch" but wold also make a peak one way or
another. A drawing of the ole Heath QF-1 should give a good idea of
a tube-type circuit, which could be "transposed" to a FET with ease.
If nobody has a a QF-1 book, I have a unit and could perhaps make a
sketch of the circuit from it.
I agree---the little Rx works dern good.
Ralph Matheny
K8RYU
207 Gibbons Place
Marietta Ohio 45750
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