Messages

1

General discussion forum / RRC-1258 MKII

« on: 2018-10-18, 02:15:23 »

What is the microphone impedance on input and output connections, For the radio and the control adapters.
I see coupling capacitors.


Jerry

2

General discussion forum / Re: Strange Noise on Transmit

« on: 2017-06-13, 15:22:43 »

Dave, I had to ohm out the jumper wire connections from the control and radio to the RJ45 connector to verify they where correct then made sure the mic ground and chassis ground where correct. I hope this helps. I have been in commercial radio communications since 1982 still working but close to retirement.
I have RF going into my RRC and plan to purchase a intelligent tuner at the base of my antenna to reduce RF on the LMR 600.  . Also have shielded Ethernet cable to use on the mic to radio. It seems the RRC is very perceptible to RF interference.
Amateur radio is fun to experiment with don't give up.

3

General discussion forum / Re: Strange Noise on Transmit

« on: 2017-06-13, 04:46:16 »

Dave, I connected a dummy load to the radio this eliminated the buzzing sound. Inspecting my antenna with a analyzer found the antenna has major problems. To be sure my feed line was good I connected the dummy load to the feed line disconnecting the antenna, no more buzzing.  High SWR back into the shack is my problem hope his helps.