Well I've now got IC7 in the right way round, but it's not quite the unqualified success that Paul seems to have had.

The AM reception is now good and clear but the signal strength on FM is now not registering more than one or two bars and I can't hear anything. This is still set up on the bench with a spare (but new) car aerial so maybe it will be OK in the car. However I think, to be on the safe side, I'll get a new CA3140 from Maplins tomorrow (they're only 60p) just in case I've fried part of the chip. Oh well I should have paid more attention in the first place !

Is it possible that I have damaged any other parts by having IC7 in the wrong way round?

Geoff