Don't know if every radio ever made has the same 'feature' but...
Tried to contact the ISS during field day Uplink 145.990 FM
Downlink came out to around 437.962.3 FM clear receive signal.
As soon as I hit TX the receive signal display goes full scale and all incoming audio is blocked out...and in some cases an audible feedback was heard.
This was replicated with the radio transmitting into a dummy load with no antenna on the receive side and RF power turned all the way down.
it is somewhere around a 20khz range where it feeds back, then drops off to quiet beyond that.
We have two radios of similar age and they both do the same thing on that frequency pair.
Has anyone else ever noticed this?
Is there some setting wrong on our radios?
Is there some filter that needs to be replaced?
Like I said this was during FD, and other locations were able to contact the ISS with apparently no problem...we didn't have this issue on any other satellite- FM or Transponder.
Mike
KF5DEY
