Re: Problems transmitting on VHF with engine running
Lol<br />Good question and please come back and tell us all what the cure is. You have got a lot of good ideas already but I will add a couple.<br /><br />First I would like to know what type antenna you have, Brand, Model and DB Gain if you know?? Also where antenna is mounted, near motor or up front??<br /><br />Second is transmitter bad if sitting still with motor running or only if moving??<br /><br />Third if you turn your squelch off where reciver opens with no signal can you here the noise??<br /><br />You could have a broken wire in your Antenna or coax on the way to the antenna coax connection to the back of radio. When your stopped works ok but when have vibration and moving wire will make and break. Very common in small lite antennas that flex alot like a shake 497. If it is a 6DB or more antenna then antenna need to be straight up when moving.<br /><br />Can be getting noise from Alternator, Spark plugs and wires, or Tac signal. Do Power wires for you radio run all the way back to your main battery Bus?? Do Power wires run right along side your tac wires??<br /><br />In general a poping noise that changes speed with engin speed normaly spark plugs or spark plugs wires. A siren noise that changes with engine speed is normaly alternator whine. Crakly and broken usually Antenna, Antenna Cable, Antenna connection at back of radio, broken wire where coax goes thru hull, or antenna angle. Frying sound usually water in cable or antenna