Many thanks to everyone who made suggestions as to solve the noise in our
intercom.
I tried Radio Shack, called The Source up here in Canada, and they sold me a
little mystery box with 3 wires which was meant to eliminate all noises. It
didn't make any difference.
I took off the alternator belt but the noise persisted sort of confirming
that it was from the ignition system which uses solid core wires, probably
the cause.
Then a tech at the shop, who is a CB and model plane nut suggested that I
take a choke (electronic) out of an old fan motor brush plate that he had
just thrown out and install it in the power line. MAGIC no more noise.all
I'll hear now is the deep baritone of Michael Oritt.
Michael Salter
100 (1953) #174
AHX12 (1953)
Bugeye (1961)
http://www.netbug.net/blogmichael/
_____
From: Awgertoo@aol.com [mailto:Awgertoo@aol.com]
Sent: September 8, 2008 11:37 AM
To: msalter@precisionsportscar.com; healeys@autox.team.net
Subject: Re: Intercom noise HELP
Michael--
My smart electronics friend suspects a diode in the alternator and suggests
disconnecting the alternator and then starting car to see if that eliminates
the problem.
The quick fix would be an RF choke available at Radio Shack or similar
store. See this site:
http://www.radioshack.com/product/index.jsp?productId=2103978
<http://www.radioshack.com/product/index.jsp?productId=2103978&cp> &cp=
There is a Radio Shack near me and they have one in stock--I can bring it
with me and we would have to solder it into the 12V+ power supply line.
Let me know by tomorrow if you cannot find one.
Best--Michael
----------------------------------------------------------------------------
----------------
In a message dated 9/8/2008 9:48:26 A.M. Eastern Daylight Time,
msalter@precisionsportscar.com writes:
I'm trying to get AHX12 ready and need to resolve a problem with the
intercom.
I'm getting a clicking noise through the intercom when the engine is
running. This is caused by some "noise" on the 12 VDC power supply line
which comes from the car's electrical system. I know this because when I run
the intercom from a separate battery there is no noise with the car running.
I have been unable to find the source of the "noise" so I want to put a
filter of some sort on the power supply line to the intercom.
I've tried those cylindrical magnet things but they didn't work.
Is there a simple in line filter that I can readily source (I leave on
Wednesday) that I can run the power through to get the "noise" out.
_____
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