I agree about the radio, should takes weeks to have an effect - time to start disconnecting circuits one at a time until you don't get that spark - could be the reg/gen circuit, try giving the reg a good rap with a screwdriver handle eek see if it stops the behavior

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics