I'm working on using the ProgRock2 for multiple oscillators in my IC-751A.? The ProgRock2 output turns off momentarily when changing to a different frequency bank.? In my initial attempt, I changed ProgRock2 banks when changing from receive to transmit mode.? One of the ProgRock2 outputs feeds a PLL circuit which goes wonky long enough for the initial transmitted signal to suffer.? I plan to insert solid state switches on the outputs so I won't have to change banks.
But when controlling a carrier or band-specific local oscillator where a PLL is not involved, it shouldn't matter.? Select your coupling capacitor to feed a signal strength similar to that given by the original crystal oscillator to the next stage.
As mentioned earlier in this thread, don't be concerned about the ProgRock2's squarish waveform; LP filters in the radio's original circuit will probably clean that up.
Halden VE7UTS
