Alternator noise through radio transmission

Just what it says -- this is the place for any discussions not related to Buying, Selling and Trading ham gear. The discussion must be related to Ham Radio.
Post Reply
n4rrh
Posts: 28
Joined: Wed Jan 10, 2007 12:50 am

Alternator noise through radio transmission

Post by n4rrh » Wed May 20, 2015 2:49 pm

I am running a 2 meter radio in car. When I transmit the other person receiving the signal is hearing in my alternator noise and gets louder as I rev the engine over his speaker (he is also in a car close or next to me) The only time that he hears it is when I transmit and no other time. I have never experienced that before and dont know what to do. I have my radio hooked directly to the battery and tried other grounding. Could it be that my alternator is going bad? Any help would be appreciated, thanks Reggie N4RRH

k9yli
Posts: 228
Joined: Fri Aug 12, 2005 11:35 pm
Location: northwest wisconsin

Re: Alternator noise through radio transmission

Post by k9yli » Wed May 20, 2015 3:22 pm

beware..... It may not be the alternaotor (been there done that )
A bad blower in the heater can seem like the same problem.. noise changes with rpm..
Most cars the blower runs even at "off"on the controls to keep positive air pressure in the body to prevent exhaust gas from entering.
but a 'whine filter' is available,, even at CB shops...

Post Reply