NF raises when TX

Greg

When transmitting on 10M this evening trying to work FT5ZM the entire NF jumps from about -128 dB up to -70 while transmitting with multiple vertical lines throughout the display.

Steve-N5AC

With the preamp on you are overloading the receiver.  You can either:

1. Turn off the preamp
2. Listen using a different antenna (RX/TX on different antennas for isolation)
3. Just understand that the signal will overload the receiver when in transmit with the preamp on

Steve

Greg

Thanks Steve.  Preamp is pretty necessary on 10M otherwise its pretty deaf  here.  And I need the gain for DX from my 10M yagi so the one antenna is needed on both TX/RX.  Is the overload and danger to the receiver?

Since what we see on the panadapter is not really an accurate picture of that is being transmitted I wish there was a way to switch that off alltogether or to add x amount of attenuation to the receiver during transmit.  I had an ANAN for a couple weeks waiting for the flex to get here and that is one of the things they had in their software that seemed to work reasonably well.

Tnx
Greg