12-14-2010, 02:57 PM
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Join Date: Dec 2008
Location: Silicon Valley CA, Storm Lake IA
Are you using a linear amp?
Seems that it might be stray RF that is getting into some of your cables. I'm not sure that your wiriing is correct; but I think it is. I'm pretty sure you cannot get talkback in your radio by manipulating the mic wires. I would make my own 1/4 inch jack cables out of high quality cables that are RF approved...
If you have any ferrite clip-on beads, I would put them on the poorer cables and see if it doesn't change things. This may be an indicator of an RF leakage problem. A linear amp will only compound this condition - IMO.
Maybe someone else may know about this talkback dilemma.
BASE: Kenwood TS-2000, GAP Titan DX, Diamond X50A, Sirio SY27-4, and IMAX 2000.
MOBILE: Galaxy DX99V w/RF Limited CR-577 mic, Sirio Z-180. Yaesu FT-8800R & Diamond NR-770.