[Antennas] Engine Noise on HF Radio

Wed Nov 16 21:42:16 EST 2011

 Ray Brown wrote:
/*snip*/
> Another possible cause could be that the battery is getting weak and
> it's not smoothing out the output from the alternator. That would be easy
> enough to check out, if your battery is between 2 to 3 years old, it may
> be in your best interest to replace it and see if that clears your whine up.
> Otherwise, you may have to test the alternator and see if it can produce
> the full output it's rated for. If it only puts out 2/3 of rated output, that would
> confirm the blown/shorted diode and a new alternator is in order.

 There are little testers that plug into your cigar lighter receptacle that test the ripple with 3 
LEDs that test the alternator diodes. Radio Shack use to sell them.
-- 
 Ron KA4INM - Did you know ...
 ... that no-one ever reads these things?