Interference

[Nitmoi]

This is wierd, any ideas?

When the rear screen heater is on the radio suffers severe interference.

Is the heater damaged?

Is there a supressor or something somewhere?

[cleverdick]

This is wierd, any ideas?

When the rear screen heater is on the radio suffers severe interference.

Is the heater damaged?

Is there a supressor or something somewhere?

What sort of interference spcifically? Engine speed related? What waveband are you listening on?

[Monster-Mat]

check the earth for the screen, and the switch

[Nitmoi]

Not speed related just crackly.

UHF 94.5 radio 4 and 98.0 R1

Any help?

[cleverdick]

Not speed related just crackly.

UHF 94.5 radio 4 and 98.0 R1

Any help?

According to this website, in your area, BBC R4 is on 93.3MHz and R1 is on 98.5MHz. I'm not saying you won't pick up transmissions outside the intended service area on the frequencies you mention, but they'll be weak and therefore prone to interference.

http://www.quns.cam.ac.uk/Queens/CompFacil/radiotv/

[Nitmoi]

Thanks mate but it works perfectly until the rear screen is on and the interference is the same on all channels. the radio is self tuning to local stations.

It appears also that the heater is not working on one bar and it appears that the radio aerial is part of the rear window.

Any relation between the heater malfunction and interference perhaps?

[cleverdick]

Thanks mate but it works perfectly until the rear screen is on and the interference is the same on all channels. the radio is self tuning to local stations.

It appears also that the heater is not working on one bar and it appears that the radio aerial is part of the rear window.

Any relation between the heater malfunction and interference perhaps?

Some lesser cars use the rear window heater as an aerial, but not the LS400, where the external antenna even trims its length automatically to the frequency tuned to!

Not sure then. But you may at least be able to repair the heater with some conductive paint, available from car accessory shops.