? When transmitting VHF, I am getting reports which seems to be ignition noise interference.
I'd be surprised if it was ignition noise.? Modern ignitions usually have the coils right at the plugs, there's no wire there to shield or put a ferrite on.? If it's popping it could be the DC going to the coils, or more likely, injector noise.? I've never had this on transmit but the fix for that could be as simple as isolating the DC to the radio (ferrites, bypassing, choke).? Where you're getting the power and ground for the radio can also influence the level of any interference that might be present.
Mark K5LXP
Albuquerque, NM