I am trying to troubleshoot an alternator
whine on my VHF
. Here are my symptoms:
are charged, and the alternator
is not working hard, the whine is minimal, but present. When the engine
is off, no whine is present at all.
are discharged (say 40% down) and the alternator is really working to push the amps in, the whine is horrible - it is hard to hear transmissions sent or received over the whine.
is an ICOM
IC-M502, with remote
command mic. The radio
shares an antenna
with my Vesper XB-8000 AIS
, through the Vesper antenna
splitter. note the Vesper unit shows my VSWR as 1:1.
Alternator is a 150 amp AmplePower unit, complete with the Smart Alternator Regulator
. House bank is a 520 amp-hour bank of AGM's.
Alternator passes the diode test, so it doesn't look like i have a bad diode. I have tried adding ferrite chokes to the power cables
, running a new, separate cable directly to my 12V bus, all to no avail.
Anyone have suggestions on troubleshooting this one? It has been extremely frustrating.