2nd Gen Non-Engine/Transmission CB Interference from Optix Pyrometer

[Big MAK]

When I key my CB the Pyrometer reads zero and I get lot's of interference.



It isn' how it's wired; the CB has an independent ground and is wired thru a painless wiring fuse panel. I've also plugged it into the cig lighter for a completely different wiring scheme and it does the exact same thing.



?????



I've had problems with significant amounts of EMF from Optix gauges before...



Any ideas?

 

[Woodenhead]

Not sure if it'll fix you problem but I had interference (the whining sound) from the alternator on my truck. My power wire is connected direct to the battery and it has a dedicated ground. I ended up installing a filter that eliminated the noise. Cost me about 10 bucks at GI Joes and wired into the hot wire but also had a ground wire on it. I'll see if I can find a link to one.

 

[BHoffert]

I know what you mean. I had a CB in my old Ford diesel and when I would key the mike it would make the tach jump up 200 rpms. The CB always worked good but could never figure out why it was doing this, because I had it wired directly to a hot power source as not to interfere with anything and a good ground.

Bryce

 

[WestTN]

Since pyro gauges work on microvolt signals I'm gonna guess it is RF interference. Shield your thermcouple lead.