In , Professor Bob wrote:

"Randy" wrote in
:


"Chris" wrote in message
nk.net...
You should be able to remove the plastic inserts where the antennas
are mounted. You may also have a problem with the splitter that
allows the stereo and TV to use the same antennas. Maybe you can use
one antenna for the CB and the other for everything else. As for the
whine, I agree with everyone else. Once the antennas are working
properly, it may go away.

Chris

If I remove the plastic inserts from the antenna mount, will that
create a
direct short when I am transmitting?

I believe the splitter could be the problem also, like I said
earlier if
this my truck I would rip it all out and start from scratch. I did a
little work ... swr @ 2.1. I just transmitted 9 miles. Whine still
there ... might be louder.



I am still wondering what is actually causing the whine i.e.
alternator, fuel pump ....... maybe I need to look at the source of
the whine rather than the ability to filter it out?


That would be your best bet, if your fuel pump comes on like most when
you turn the key to on position without starting the truck, then you can
tell if it is fuel pump or if vehicle started and the noise increases
with engine rpm then it may be alternator or even the electronic
ignition. Once you find out what it is then you can try and correct the
problem otherwise you are shooting in the dark. Alternator whine and fuel
pump noise can usually be correct by a capacitor and or choke, the
igniton may need to be shielded to stop that.


I believe he said that the whine follows the engine RPMs, so it's probably the
alternator. Regardless, if you reduce or eliminate the source of the noise you
are not fixing the problem, because the radio will still be suseptible to other
sources of RFI such as the whine from other vehicles, power lines, industrial
equipment, etc. It's as annoying as those pop-ups in your internet browser.
Properly grounding your radio works like a good pop-up blocker.





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