Thanks to Jon, Dan and Paul. I asked because the external battery pack I use for my iPhone when I'm not flying creates a whole bunch of noise on my Becker AR4201 radio and on my iCOM A6 when I use it in the glider. I have a 12v adapter for an iPAQ 3950 that makes noise in the glider, too.

I had an old cigarette lighter to iPhone charger. If I can find it, I'll give it a try. Else I guess I'll give the Blue Sea 12V Dual USB Charger Socket a try.

-John, Q3