I own 4 GE Rangr 150s. 2 of the 40 watt and 2 of the 110 watt. They transmit and receive beautifully without the Call Guard tones turned on. The deviation is a little low and won't allow me to get full 4.75 kHz deviation, but the audio quality is perfect. When I turn on the Call Guard tone to use a repeater, there is a bunch of noise added to the voice audio. I am thinking that if I have 4 radios doing this, then someone else must have seen this problem before and hopefully has some answers. This radio doesn't have a separate tone board as some evidently do. The tones are created in the CPU and sent to the audio circuitry on the WALSH BIT lines from the CPU. Has anyone seen this before?
I have adjusted the deviation pots (one for the PLL, one for the exciter) and still can't get the deviation up to spec. I am getting about 2.75kHz. I have the manual and have studied it thoroughly. My guess here is that I have a failing component such as a capacitor that is reducing my audio. Just wanted to see if anyone else has had this problem with these old radios.
