Great idea!
73/jeff/ac0c
alpha-charlie-zero-charlie
On 5/2/2024 6:40 PM, W7WRX wrote:
toggle quoted message
Show quoted text
These radios drop approximately 40 cycles on TX.? This is annoying
in modern times.
This drop happens in ALL modes.? I isolated the VFO from the radio
and found the issue is the VFO itself. It's not a voltage
regulation problem.? The 12ba6 is an odd ball vfo tube and why
they used a sharp cutoff tube like this I do not know.?
Rather than rebuild and modify the radio, my friend, Jim k7jeb and
I decided to offset the TX voltage to the varactor.? This is done
with a 1meg resistor and a 10K.??
Place the 1meg from terminal 12 on relay to the ground terminal
next to it.?
Next, unhook the wire from pin 8 on relay.? Insert a 10K resistor
in series with relays terminal and the wire.?
That's it.? The offset is gone..it will be within a cycle.?
The rit and cal pot all work normally.??
Hope this helps someone.?
