Date:         Sun, 3 Apr 2011 12:23:43 -0700
Reply-To:     Alistair Bell <albell@SHAW.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@SHAW.CA>
Subject:      Re: radio whine, need help
Comments: To: neil n <musomuso@GMAIL.COM>
In-Reply-To:  <BANLkTi=60D83VvpH3YRm58LEjhcjwVqVGA@mail.gmail.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

It could be the head unit, but the whine only comes through the front
speakers (external amp supplied). I could try switching outputs to amp.

New sparkplugs (NGK B6ET) didn't change things.

I have noticed the whine changing in intensity at times, not related
to engine speed. I have it in my mind that it is alternator, maybe a
hinky diode, but that's just an unsupportable guess. I'll get David B.
to fix it when he comes by tomorrow :)

alistair





On 3-Apr-11, at 9:36 AM, neil n wrote:

> Sure sounds like the vehicle electrics are the cause or at least
> part of it and that head unit likely ok. But to be sure....
>
> Do you have a car radio you can hook up?
>
> My thought: if something went slightly hinky on head unit (cap where
> power goes in? Final stage amp?), and alt. etc. is supplying less
> than best quality power, this might produce a sudden change.
>
> Neil.