[Antennas] Engine Noise on HF Radio

[Ken]

You can check the voltage at the battery using the AC setting on your trusty 
volt/ohm meter. If you get a significant AC voltage then something in the 
alternator is going/gone bad (ripple). The battery will smooth out a little 
ac but more is bad and will distroy your battery.

Significant you ask? ....You'll have to be the judge of that. I ususlly 
start taking things apart at anything over 2vac.

Ken
N4zed


----- Original Message ----- 
From: "Joe" <nss at mwt.net>
To: <antennas at mailman.qth.net>
Sent: Thursday, November 17, 2011 9:04 AM
Subject: Re: [Antennas] Engine Noise on HF Radio


> In addition, does the noise be actually a "Noise" where it's sparky in
> sound, and the level of "Sparkyness" changes with the speed of the
> engine, or does it actually have a tone to it. That changes in pitch as
> the rpm of the engine changes.
>
> The Sparkyness is from the plugs and wires,  the tone is from the
> alternator.
>
> Joe WB9SBD
>
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
>
> On 11/15/2011 10:48 PM, Jay AD5PE wrote:
>> Does the pitch follow the speed or the engine rpm?
>>
>> Art Barbetta Jr N8RKA<n8rka at n8rka.us>  wrote:
>>
>>> I have a Tarhill II screwdriver antenna on my 2008 Focus.
>>> When I put my FT-857 in my car I get a whining noise that increases when
>>> you accelerate the noise get faster.
>>>   What can be done to get rid of the noise..
>>>
>>> Art N8RKA
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