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Workman noise filter

whiteastro

whiteastro

Sr. Member
Feb 22, 2019
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Was wondering if anybody ever tried this filter before and did it work very well or not ?

www.ebay.com

WORKMAN CBNF3AXX AUTOMOTIVE ALTERNATOR IGNITION NOISE SUPPRESSION FILTER 20AMP | eBay

NEW automotive electrical noise filter. 6Ft 12AWG wiring with 3 pin plug fits standard Cobra, Galaxy, Uniden and other CB radios. Includes an high inductance iron core coil and capacitor L-C filter to reduce interference caused by automotive alternator and ignition impulse noise.
www.ebay.com
 

whiteastro said:
Was wondering if anybody ever tried this filter before and did it work very well or not ?

www.ebay.com

WORKMAN CBNF3AXX AUTOMOTIVE ALTERNATOR IGNITION NOISE SUPPRESSION FILTER 20AMP | eBay

NEW automotive electrical noise filter. 6Ft 12AWG wiring with 3 pin plug fits standard Cobra, Galaxy, Uniden and other CB radios. Includes an high inductance iron core coil and capacitor L-C filter to reduce interference caused by automotive alternator and ignition impulse noise.
www.ebay.com
Click to expand...
How do you know the alternator is making the noise?

Next, it is very hard to control noise being generator by using a long wire with a suppressor that far from the Alternator if there were any chance of doing that it would most likely need to be done at the alternator.

I assume the noise you are experiencing is a whine that increases with the speed of the engine?
 
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OldTech03 said:
How do you know the alternator is making the noise?

Next, it is very hard to control noise being generator by using a long wire with a suppressor that far from the Alternator if there were any chance of doing that it would most likely need to be done at the alternator.

I assume the noise you are experiencing is a whine that increases with the speed of the engine?
Click to expand...
It gets worst when you turn the fan on high speed and it is a old 95 Astro van so no telling how many Old problems are in the system.
 
Last edited:
whiteastro said:
It gets worst when you turn the fan on high speed and it is a old 95 Astro van so no telling how many Old problems are in the system.
Click to expand...
So is the noise the fan or is the noise there when the fan is turned off and then when you turn the fan on high the noise increases? If you have any ground looping in the antenna system or the DC power distribution those will all add to the issue. Now if the alternator is the issue and any of the diodes in the alternator are leaky or poor alternator case grounding being it is a vehicle that is over 25 years old then all these little issues can be part of the problem.
 
VERY simple to tell if this filter will make a difference to your mobile setup.

First, unplug the antenna coax. This is strictly a power-source filter, and leaving the antenna connected will obscure what difference this filter makes.

Now, turn on the radio, turn off ALL the noise limiter/blanker features and turn up the volume until you hear noise.

Start the motor.

If all you hear is a gentle "hiss", this filter won't make a difference.

If you do hear impulse noises, turn off the radio, insert this filter into the power line to the radio start the motor and compare before to after.

Hint: if you hear significant "whine" from the alternator that changes pitch with the engine speed, I'm pretty sure this filter is also meant to suppress that kind of engine noise.

Just the same if you hear significant alternator "whine", have the alternator checked with a proper automotive load tester. Loud "whine" tends to accompany failing diodes in the alternator. If that's the case, you'll get left high and dry with a battery too weak to start the motor some time down the road.

73
 
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nomadradio said:
VERY simple to tell if this filter will make a difference to your mobile setup.

First, unplug the antenna coax. This is strictly a power-source filter, and leaving the antenna connected will obscure what difference this filter makes.

Now, turn on the radio, turn off ALL the noise limiter/blanker features and turn up the volume until you hear noise.

Start the motor.

If all you hear is a gentle "hiss", this filter won't make a difference.

If you do hear impulse noises, turn off the radio, insert this filter into the power line to the radio start the motor and compare before to after.

Hint: if you hear significant "whine" from the alternator that changes pitch with the engine speed, I'm pretty sure this filter is also meant to suppress that kind of engine noise.

Just the same if you hear significant alternator "whine", have the alternator checked with a proper automotive load tester. Loud "whine" tends to accompany failing diodes in the alternator. If that's the case, you'll get left high and dry with a battery too weak to start the motor some time down the road.

73
Click to expand...
Thanks for the test practices which I will try but I did have the alternator changed years ago. Even though the van is a 95 it only has about 90,000 miles on it and the van only had 56,840 miles on it when I bought it. But even low mileage can't reverse time. It's only used when I have to haul or tow something, and is a pleasure to drive and travel in. Thanks again, I'll get testing.
 

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