[Antennas] Reducing Ignition Noise

Thu Apr 21 00:39:31 EDT 2005

I am looking for ideas to reduce the received ignition noise in my mobile application. I have a Yaesu FT 890AT mounted in my 2000 Ford F250. I am using a hamstick that is mounted to the bed of the truck. The DC line runs direct from the battery and the radio is mounted overhead in the cab. I am getting a fair amount of what sounds like sparkplug noise that varies with the engine speed that I would like to minimize. 
Any ideas would be greatly appreciated!
Dean Fewkes
KG7MZ