Taking a stab in the dark as to which Forum to post this in, but "Electrical" makes the most sense I guess..

My daily driver ('55 Super 88) is a bone-stock setup, including the ignition system (i.e. 'points').

There is an aftermarket radio in the glove box that was there when I bought the car, and there is a lot of 'noise' from it (AM or FM) - I say "noise" because it's more noise than static, but it's annoying nonetheless.

The capacitor on the coil is typically for radio interference I believe - outside of changing this out, any suggestions to reduce noise in the radio? - I'm fairly certain that the source it the ignition system since it goes away when the car is off / radio on.

Thanks

 

Change the cap on the coil, make sure your antenna and radio chasis ground is clean and secure. Also leaking spark plug wires or non resistance wires will cause it.

 

Is the radio hooked directly to the alternator for power? (The 12v terminal on the back) If so move it to the fuse panel. Radio Shack also makes noise filters that will eliminate this.

 

For a quick test run a hot wire from the radio directly to the + side of the battery and see if it still crackles and pops, if not start looking for bad ignition wires,distributor cap leaks, bad ground ect.....Tedd

 

i'm not certain about your vintage of Oldsmobile, but the cutlass distributors had radio frequency interferance shields surounding the points. if your distibutor came with these, but have gone missing ,that might be something to consider. they do help because i tried running the car without them installed and the radio was impossible to listen to, a constant buzz as the points opened and closed. just another suggestion, hope this helps.
cheers,
John Paul

 

X2...usually you mount the filter by the regulator on the firewall. It helps quite a bit.

 

Without me taking a hike out to the garage to look, isn't there a capacitor on the generator also?


I remember those. Often they got trashed as a pain in the backside because they are a pain without some kind of screw starter tool. They did not exist in the 50's and so there isn't any tapped holes in the plate to mount them if you could find a set. But it's an interesting idea for a modification. Thanks!

 

Do they? I couldn't find anything on their website. The Radio Shack of a generation ago would have had it, but the Radio Shack out there now is not your father's Radio Shack. They've become an abridged, miniature version of Best Buy.


Crutchfield, however, shows a radio noise filter for $12.99.

http://www.crutchfield.com/p_003S15A...t.html?tp=2653




You could try this site, too.

http://www.hifisoundconnection.com/S...9952/SFV/30046

 

There may also be a cap. on the voltage regulator.

 

All good suggestions...I know that "electrically", condenser and capacitor is the same animal - anyone know if these are the same ones? (i.e. one on the points = one on the coil = one on the generator = one on the voltage regulator?) -

I'm going to try changing out all the ones I can find...if that doesn't help I'll try a physical noise suppressor.

 

have you checked the gen or alt output for noise on the line or a/c volt output. had a pickup that had a/c volt output from alt driving radio nut when running

 

No alternator on a 55 unless modified....Tedd

 

i was taking about a\c ripple from the doides in the alt redfeir being bad. surpressor on radio won't fix problem

 

Gorden,

On the deluxe radio there is an adjustment that puts the antenna in tune with the radio if this aftermarket unit wasn't properly tuned when installed this could be the problem, the adjustment is located( on an original radio) next to the antenna socket and a small screwdriver is used to adjust it. Put the radio on a weak signal then turn the screw back and forth till the station is at its strongest. This should do it if that was the problem....Tedd