AKremotes, have you found anything over the months that you could share with us if you're still reading the forum? i know that everything is frozen solid up there now as it's frigid here now too as we just had a record low the morning of the 6th of december 2007 of 7 degrees f setting a new record low for the date by 4 degrees as it was previously 11 degrees f.

Neil,
We ended up moving the controllers. Tried the split ferrite cores but no improvement. Never even tried shielding. By moving the controllers to the generator shack we got several benefits-
-less than 10' of cable to the batteries
-generator building is skinned in metal, so it's somewhat of a faraday cage
-further from the tower/antennas, which is where the noise was getting into the radios

The sites that have never given us a problem will probably not get moved.

glad to hear you had resolved the problem without too much trouble. keep warm up there.