Post by r***@frontier.comHi guys, I have a hallifcrafters s76 and asking if any one has installed a
dd103 digital readout in one. I have it all restored. RED N9GHE
Red-
Does your dd103 have the counter circuit needed to convert the reading
of your local oscillator to operating frequency? If not, you will need
to design that circuitry.
I found a service manual at:
<http://gmcotton.com/ham_radio/misc%20manuals/Hallicrafters/Hallicrafters
_S76%20HF%20Reciever_Service%20Manual.pdf>
I think you would need to take a sample of the 6C4 oscillator (V3)
voltage, either at the plate or the grid. Using a small capacitor like
10 pf should not upset oscillation, but may require retuning. Also, it
is possible the sample may be too small!
73,
Fred
K4DII