In article ,
Howard wrote:


Sounds a lot like 'alternator whine'. Is your radio hooked directly
to the battery, if not then proceed to make it so (and fuse both
positive and negative leads). If that does nothing, or not enough, to
fix the problem you may wish to consider a DC noise filter. RatShack
carries a couple of them, the 10 amp model is about $16 (pn 270-051).

Even if the radio only draws 10 amps on transmit, I'de get the 20 amp
filter. You'll have less voltage loss that way.

--
Larry Weil
Lake Wobegone, NH