Aerial amp - dodgy earth?

ChrisH · 19th February 2010, 11:05

A week ago I noticed odd interaction between rear screen heater and radio. It started when I tuned the most interesting FM stations into the memory, with car parked and engine off. On driving away half of them were gone or very poor. Then I switched off the screen heater that comes on when the car is started, and everything was fine again.

It strikes me that the aerial amp might have lost it's proper earth feed and is finding one through the heater tracks. Which is fine until that goes to +12V.

Anyone else had this, and any suggestions where I should go looking?

Edit: Ought to mention - it's a Symphony radio.

ChrisH · 22nd February 2010, 07:30

Duotone has answered almost the same question from paul-39 in the Technical Help Forum Radio transmission not working

Departed · 24th February 2010, 20:49

It will be a small break or partial break in one or more elements.

19th February 2010, 11:05	#1
ChrisH Regular poster Rover 75 facelift Saloon CDTi auto ConnSE Silver Join Date: Jan 2010 Location: Winchester Posts: 77 Thanks: 2 Thanked 2 Times in 1 Post	Aerial amp - dodgy earth? A week ago I noticed odd interaction between rear screen heater and radio. It started when I tuned the most interesting FM stations into the memory, with car parked and engine off. On driving away half of them were gone or very poor. Then I switched off the screen heater that comes on when the car is started, and everything was fine again. It strikes me that the aerial amp might have lost it's proper earth feed and is finding one through the heater tracks. Which is fine until that goes to +12V. Anyone else had this, and any suggestions where I should go looking? Edit: Ought to mention - it's a Symphony radio.

22nd February 2010, 07:30	#2
ChrisH Regular poster Rover 75 facelift Saloon CDTi auto ConnSE Silver Join Date: Jan 2010 Location: Winchester Posts: 77 Thanks: 2 Thanked 2 Times in 1 Post	Duotone has answered almost the same question from paul-39 in the Technical Help Forum Radio transmission not working

24th February 2010, 20:49	#3
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	It will be a small break or partial break in one or more elements.