UHF interference
Submitted: Tuesday, Oct 21, 2003 at 21:15
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Shaun
Hi All,
I have a GME UHF in my 99 petrol hilux that is wired directly to the battery. Problem is when I transmit it seems to cut the vehicles am/fm radio out with some form of interference. The unit has been in the vehicle since I bought it new in '99 and have had no probs up to this point. Anyone got any ideas??
Shaun
Reply By: chrisfrd - Wednesday, Oct 22, 2003 at 16:50
Wednesday, Oct 22, 2003 at 16:50
Hi there Shaun!
Explain the I/F. Is it only doing it when the car is running? Is it a buzzing noise? If it is a high frequency buzzing noise, then you are getting bleed-through from a stuffed ground plane on the RF cable. Replace the cable if this is happening as it could be that the shield is open-circuit or touching the body.
Typically, I shun wiring direct to the battery. it's messy (potentially DANGEROUS!) and not required. This is because you normally have many accessories that are to be wired-up to the truck and typically these end up in a bloody mess. Get it sorted out properly (don't rely on auto-electricians, as most of them are bleep -house) and distribute the power through the truck correctly..
My Patrol has only the main power feeds to/from the battery and management system. It then flows into a 140A resettable 12V breaker (lower-drop than fuses!) then down through some 130A Welders cable to a distribution block at the back, from there, a fuse system distributes the power throughout the truck.
AnswerID:
34722
Follow Up By: Shaun - Wednesday, Oct 22, 2003 at 21:54
Wednesday, Oct 22, 2003 at 21:54
Thanks heaps. I will
check it all out, and yes, the interference is a very high pitched buzzing.
Shaun
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