Just started to have a problem with my fixed Icom m505 vhf set. It's been fine for the last 3 years but has just started with an intermittent fault.
When being first turned on it seems fine for a short while but then suddenly stops receiving and I think doesn't transmit properly either. I have found that it will just about receive when the squelch is turned right down to the point that there is a permanent hiss, but the minute the squelch is turned up to cancel the hiss it will stop receiving. It seems to be ok when tested with a handheld close by. I've yet to try a radio check with a bit more distance.
My question for any radio guru's is..... does this sound like an aerial problem or a set problem. What intrigues me is that the problem is intermittent. Recent testing was with the boat dried out so there is unlikely to be a vibration or movement issue causing this. I've played with the connections and wires and checked everything I can, but can't solve it.
Poor connection to the antenna? Try cleaning up all the connectors (stainless wire brush should do if you can get it in to the connectors, or get some contact cleaner from a local electronics store.)
Poor connection to the antenna? Try cleaning up all the connectors
jky
I've remade the connection at the aerial and checked the coax for any damage but nothing obviously wrong. It's just a bit odd that it's ok one minute then not the next, though yesterday it was working for less time than ever.
