What is this device (radio wiring) - JeepForum.com
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post #1 of 8 Old 05-27-2017, 01:25 AM Thread Starter
cj7red
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What is this device (radio wiring)

Started pulling wires to wire in a new stereo and found this connected via a pretty large gauge black wire from the harness to the stereo. I have no idea what the red piece is next to the capacitor.



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post #2 of 8 Old 05-27-2017, 04:49 AM
gmakra1
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Its a noise suppressor and it filters out ignition noise from the radio.
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post #3 of 8 Old 05-27-2017, 07:17 AM
John Strenk
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If there is only one and going to the power input, then I think gmaka1 has it right,

It there is two, then it could be a crossover for the speakers. But it would depend upon your setup.


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post #4 of 8 Old 05-27-2017, 10:56 AM
RadioRadio
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Yep...looks like a ferrite choke.

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post #5 of 8 Old 05-27-2017, 07:43 PM
John Strenk
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Quote:
Originally Posted by RadioRadio
Yep...looks like a ferrite choke.
Ferrite?
That choke looks like its wound on an iron core not ferrite.

Just a simple LC choke.


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post #6 of 8 Old 05-28-2017, 05:40 AM
Dryseals
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ELI the ICE man. That saying has stuck in my head since 1975, Navy BEE school. Voltage lags current in and inductive circuit ELI, Current lags voltage in a capacitive circuit ICE. Its a noise filter as other have said. By now the capacitor has gone bad, I would chunk it, no real need for them with today's gear.
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post #7 of 8 Old 05-30-2017, 06:04 AM
John Strenk
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Quote:
Originally Posted by Dryseals View Post
ELI the ICE man. That saying has stuck in my head since 1975, Navy BEE school. Voltage lags current in and inductive circuit ELI, Current lags voltage in a capacitive circuit ICE. Its a noise filter as other have said. By now the capacitor has gone bad, I would chunk it, no real need for them with today's gear.
You've never parked next to my jeep with my engine idling. Swamps AM and FM bands on any car withing 20'.


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post #8 of 8 Old 06-08-2017, 12:52 AM Thread Starter
cj7red
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Thanks guys. I'm putting in a new alpine head unit Do you think it's necessary?
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