wannawagon wrote: Amp seems to only provide amplification to the filament in the back glass with 2 wires?(to the LHS top of screen)
, you can trace the filament and there is a connection between the 2 soldered connectors (via the filament) but I dont seem to be able to record any resistance between the 2. Don't know if thats normal? Can't see any obvious damage to filament.
A photo might have helped here.
I don't have any schematic or curcuit details for the amplifier, but it could be a "dipole" antenna (think TV rabbit ears), in which case there shouldn't be any connection between the two wires.
There is another single connection (not connected to the amp) but its filament is very short in the glass. (to the RHS to pod screen)
What do you mean "pos screen" ?
Am I right in saying that the filament with the double connection is AM and the other is FM?
I don't know. I would have thought they would use a sngle antenna, but it's possible there are seperate elements for the seperate bands.
The Amp power is black with brown tracer (same colour as the earth for the Amp) and seems to operate when either AM or FM is selected.
So you can see 12V there whenever the radio is on?
I bought an ebay manual and it says that none of the 4 terminals to the amp body should have >10 ohm, in my case they all register as open circuit so I can ionly assume it passes that test.
Are you reading that correctly. The workshop manual page I posted above specifies that 4 measurements should all be 10
kilohm or greater!
Oddly with the AM or FM selected (and volume up) I can't get static , or even a click etc as I attach or detach the amp. or either antenna connection to the amp.
That does sound more like a head unit problem. I would expect you to hear some static if it's not tuned to a station.
Should I get a slight voltage at the antenna connections when the amp is on?
No
What city are you in?