At 11/26/2009 07:14, you wrote:
>The recent discussion on Spectra audio popping prompts this post. > >Has anyone cured the audio popping on a GE Custom MVP. The speaker pops >every time that the squelch opens. I have several radios that this happens >on, some worse than others. The speaker audio comes from pin 12 of AR901 on the SAS board. The schematic calls out 6.6 V unsquelched & 0.1 V squelched. C921, a 220 uF coupling cap couples the audio to the speaker. Off hand I don't see any way to get rid of the DC step short of replacing/redesigning the audio amp. You could try replacing C921 with a smaller value cap to reduce the low frequency content of the step. Bob NO6B
