Mark wrote: >........... I then disconnected the transceiver antenna at the radio > and the symptom went away. ................
Something else could be the trouble and I have not seen that possibility mentioned by others with their excellent replies. The coaxial cable that goes from your transceiver to the radio antenne has a characteristic impedance of 50 Ohm. The antenna must, at the point where it connects to the coaxial cable, also present a 50 Ohm impedance. If not, a portion of the RF energy going to the antenna gets reflected back and couses standing wawes on the shield of the cable which then in turn radiates RF energy. If you could find an Amateur Radio operator who has an impedance bridge, he could check that out very easily. Also, if he happens to have a Grid Dip meter he can check if the transponder is actually transmitting when the light comes on. Good luck finding a Ham so equipped! Louis
