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#1
08-22-2022, 01:53 PM
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Radio Noise Suppression
Just installed an under dash FM converter....which runs through the stock AM radio in my 61......
Plays well in the accessory position.....but lots of interference when engine is running...in FM mode Engine is dead stock other and addition of an externally regulated alternator. I obviously require some sort of static filter/suppression... Have some 60's and 70's GM parts cars here.....that I could rob something from... Any input is appreciated.. |
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#2
08-22-2022, 02:20 PM
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Are all the factory grounds still intact too? The factory used a mesh copper wire for radio noise suppression.
__________________
-Jeremy 1968 GTO 4-spd convertible, console, factory gauges, hidden headlights, 3.90:1 posi, AM/FM radio. 1962 Catalina convertible, Starlight black w maroon interior & white top. |
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#3
08-22-2022, 02:24 PM
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Make sure the converter has a good ground to the dash/firewall/engine/battery negative.
The worst thing to do is to share a ground wire from something that carries/noise or can get noise injected into it. George
__________________
"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum |
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#4
08-22-2022, 02:32 PM
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Quote:
There are braided ground straps on each head to upper control arms and back of both heads to firewall.. |
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#5
08-22-2022, 02:39 PM
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Quote:
Will hard ground and see if that helps |
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#6
08-23-2022, 08:07 AM
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Plug wires were the cure for me after chasing my tail on this same issue
__________________
Chris D 69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60' |
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#7
08-23-2022, 08:58 AM
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Was my post removed? I have 1 GM manual left on this. I’ll be in Dayton, stop by the booth.
__________________
🧩 Burds Parts, Finding those Hard to Find PCs, no Fisher Price Toys Here Just Say No To 8” Flakes F ire B irds 🇮🇱 |
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#8
08-23-2022, 09:48 AM
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Narrow Things Down
Un-plug the alternator to rule out or verify interference from charging.
Clay |
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#9
08-23-2022, 12:11 PM
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Quote:
 Pm me a price...if you will mail it... |
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#10
08-23-2022, 12:28 PM
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Any live wires are supposed to be as far from the audio wires as possible.
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#11
08-24-2022, 01:13 PM
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I have one copy of the manual left, $10. It’s about that to ship. If you want it I’ll get it out after Dayton
__________________
🧩 Burds Parts, Finding those Hard to Find PCs, no Fisher Price Toys Here Just Say No To 8” Flakes F ire B irds 🇮🇱 |
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#12
08-24-2022, 09:16 PM
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Quote:
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