Interference from electronic anti-rust unit??

[Retroradio]

Anyone ever here of this? I heard from a fellow that he can't run a CB in his car as the electronic anti-rust unit causes interference????

 

[nd5y]

https://en.wikipedia.org/wiki/Cathodic_protection
I haven't heard of it being used on vehicles (we don't have rust problems here in the SW) but I can see how hooking up a noisy power supply to a big antenna like a car body could cause interference.

 

[a417]

I totally believe it, as nd5y mentioned, as it's (probably) an unshielded power supply hooked directly to frame ground.

Recipe for (RFI) disaster.

If they guy is not totally hellbent on running his CB all of the time (like when his wife has the car etc...), then I'd hook up a 12v NC relay to the galvanic protection unit, and maybe find a way to trigger it off the CB unit ( or put a switch on the B+ for the CB, and feed the NC off that) so that when he turns on the CB, it cuts out the galvanic prevention device. Power one device, or the other.

When the unit is on, the device RFI's away happily none the wiser and he can have his chicken band all to himself.

 

[PACNWDude]

I remember these being sold for automotive use. One vehicle I had used one of these, I just rigged it up to be easily disconnected and had a CB radio istalled as well.

Most any electronic add on device can be installed to be disconnected easily. Do this and then use whatever accessories you like.

 

[Retroradio]

PACNWDude - Did you how it up to be dis-connected because it caused interference with the CB?

 

[a417]

look for a fuse in the wiring, that's the easy kill.

 

[Retroradio]

Not really looking on how to dis-connect it. ( as its not that complicated....lol) I don't have this issue and this thread was for information gathering.
I was trying to verify if PACNW had the same issue. if so then I know it's not an isolated case having never hears of this issue before.

 

[a417]

PACNWDude - Did you how it up to be dis-connected because it caused interference with the CB?

Sorry, I totally misunderstood this post.:roll:

 

[a417]

Not really looking on how to dis-connect it. ( as its not that complicated....lol) I don't have this issue and this thread was for information gathering.
I was trying to verify if PACNW had the same issue. if so then I know it's not an isolated case having never hears of this issue before.

LBH, it's probably not an isolated issue, it's probably more like there are far fewer devices on the road - and a commensurately smaller number of them in vehicles with CB radios, so the amount of verifiable RFI issues in vehicles with active CB radios is a very low number.

 

[PACNWDude]

Yes, the quick disconnect was for noise. CB will get noise from everything: ignition circuits, sparkplugs, automatic doors at supermarket, skip and any other source.

Radio shack used to sell a lot of choke coils and noise suppression items for CB use. Some vehicles needed a lot more than others to keep the noise down.

The anti rust system was sold through JCWhitney catalogs as a rust prevention device. It was grounded to the frame of a vehicle, just like the negative side of most car accessories you may add to them. So noise was a bad problem with these. The one I had, did not have a fuse, unless you supplied it. It connected to your battery and then the car frame, a quick disconnect for the wires could isolate it for using the CB radio though.

 

[Retroradio]

PACNW - thanks for the info.. Now I know that this is not a unique situation. I have dealt with noise on the CB for 30 years and this one suprised me. I have "reseraching" on the net to see how they work and it's pretty interesting. Good to know when chasing interference gremlins.