Question about unwanted VFO pulling during transmit
hI:
Try shielding your VFO
Good Luck
Heriberto
LU6DBU
escribió en el mensaje
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Hello all,
Can someone explain to me the mechanism of how a VFO "pulls" during
transmit? I have a transmitter circuit I've breadboarded, ugly
construction style, and the VFO will pull up ~2kHz with the key down.
The transmitter circuit is borrowed almost verbatim from the K1SWL
SW40+ transceiver.
I've checked the following:
1. dropped off the driver and final amp circuit with no change in
behavior
2. the tuning voltage to the varactor in the tank circuit does not
change during keydown.
I know there could be several answers here. What should I be looking
for?
Thanks to all,
Kenn
KA5KXW
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