[TVI-RFI-EMI] RFI from florescent lights

[ron]

Based on your limited information,

The noise your hear on the radio (if it's hash) is RF generated from 
the florescent lights, thats why chokes don't work. It's not going 
over the power line, it's being radiated from light fixture.
Check ballast. That produces continuous hash noise.

The birdies and squeals could be coming from something else in the 
camper that is related. (PC monitor, network cable, TV, inverter 
(power source) or something electronic-control)

good luck

Ron, wb1hga

Jim Davis wrote:
> I am having a terrible time with RFI from the florescent lights in my 38
> foot motorhome getting into my IC-706 which is mounted in the rear of the
> motorhome. I think I hear the interference on all HF bands, but it is
> especially bad on 75 meters. The RFI manifests itself by producing loud
> birdies and squeals into the receive audio. Soon as I turn the light
> switch off, the noise goes away. 
> I lowered the light fixtures and wrapped the supply leads with RF chokes
> to no avail and put chokes on the leads connected near the switch also to
> no avail.