Bob,
I have not tried the Pertronix, but I have to ask if you had that problem
before the Pertronix ignition was installed, or have you just installed the
radio?
Poor grounding of the body to the engine can contribute to engine noise.
Make sure the engine to frame and frame/engine to body grounds are in good
condition. I use 1 1/2" braid straps around both motor mounts to insure a
good engine to frame ground.
What about the condition and type of plugs and wires? Are they resistance
plugs and wires, or solid wire, which contributes to a better spark at the
plug and increased ignition noise. Is your distributor cap clean inside?
If some of the dizzy cap contacts are rough and black it could indicate wire
or plug problems. Make sure your coil body is making good ground contact
through the bracket to the firewall. Make sure your points and condenser
are in good condition.
Is your radio well grounded to the car? There is usually a ground lug on
the mount, or the radio, which should have a good (1/2" flat braid if
possible) connection to the car body.
You keep seeing braided wire in my notes above. That is because you are
dealing with radio frequencies and those frequencies only travel on the
outside surface of the wire. Small wires provide very poor RF conductivity,
and can add to your problems. Braided wires have a lot of surface on all of
the individual wires, providing a good RF ground.
Tom
69 2000 "Mr. Hyde"
Portland, OR
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of
bob_wilson@agilent.com
Sent: Wednesday, June 25, 2003 8:46 AM
To: datsun-roadsters@autox.team.net
Subject: Pertronix & Radio Noise
Does anyone, who is using the Pertronix Electronic Ignition system, hear
considerable noise in their radio? I have a Sony AM/FM/Cassette radio and
when a radio (AM is worse) station is weak, there is considerable noise from
the ignition. This noise becomes less if I take the car out of gear and let
the engine rpm drop to idle.
Just wondered if anyone had this situation and found a solution.
Bob Wilson
1970 1600 SPL311-28383
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