Just wondering if anyone else seems to experience (I think) engine noise/interference while using their Pro-96. I drive a 1994 GMC Seirra and there seems to be a lot of interference with while driving my truck and listening to my scanner.
Engine Noise and the Pro-96
- Thread starter Gymbag
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flet123rick
Member
Gymbag said:
I have the pro-96 and have no problems. Could be related to the spark-plug wires if they have been changed for the OE.
Take care and Happy scanning
Al42
Member
Varying with engine speed, road speed or neither? Rough, smooth or popping? Are you powering the scanner from the lighter socket or from batteries? External connector or rubber duck? There are about a dozen major noise sources in a car and each one produces a characteristic noise. Some can be stopped easily, some cost more than the vehicle to stop.Gymbag said:
GMs are usually pretty good when it comes to noise, except for alternator whine.
This helped my ignition noise situation a bunch (nissan and a pro-92): I put a grounding jumper around a hood hinge. You would think the hood is well grouned, but it was 200 ohms closed and 4-600 if you shook the car. Also, I learned from the squelch opening that the air bag computer is in the center console. I have to tighten the squelch if I put the radio in the cup holder.
How about trying a noise filterif you have it pluged into your cars power supply, and the spark plug wires is a fact, the wrong type of wires would, aka copper wires would give you EMI feed back.
Al42
Member
Feedback from a scanner? Nah. But unsupressed wires could cause ignition noise. Now "will", but could.lowboy654 said:
Ok just a little more info.........I usually just run with the battery pack but do have a cigarette lighter adpater and using only the rubber duck antenna, it is more noticable in the 150.000-168.000 range.
MacombMonitor
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Gymbag said:
If I had to guess, probably your trucks computer. More common sources of interference are high voltage ignition (tic, tic, tic), and alternator noise (variable whining), as others have mentioned. But if it's primarily limited in that range, I'd say it's the computer. You might try calling the service department at a dealership. If this was a common problem, it's probably been documented by amateur radio operators, and may be in their records.
Running off the radio's batteries, and using an external roof mounted antenna would probably help a lot.
Bucko
Member
I have a 93 Silverado and the on board computer does cause interference, high band is where I get hit the worse ( example 154.43 ).
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