[EdHolland]

I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. The other idea I had was to fold several layers of alumin(i)um foil and attach it with Kapton tape. That would be a safe and effective heat shield.

[Arran]

Ed;
One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to asbestos but is not of course, some auto parts stores like NAPA sells it.
Regards
Arran

[radiorich]

hello Ed,
how about that speacial tape used for ducting it's like foil or how about thin piece of
aluminum roof flashing and use really good double back tape.

Sincerely Richard

[EdHolland]

Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately.

More later.

[EdHolland]

I completed the insulation on the cabinet interior (Al foil and hi temp silicone rubber), and reglued the speaker gasket.

FM front end alignment completed, chassis bottom cover back in place, tidied up the flying lead that is used to couple the line cord to the FM antenna I had everything back in the case.

Time for a test - all sounding great on FM, dial alignment is pretty good, ditto on AM. And then the trouble started.. loud crackles and crashes again on AM. Almost certainly SMD again So I shall be going in to clean the micas in the remaining AM cans. Not unexpected, I suppose but not something I really wanted to be getting into at this stage.

[Paul Philco322]

That's a bummer but get them now. Paul B

[EdHolland]

Yes - better it happened on the repair bench than returning to the owner.

The other question is - do I also dissect and clean the remaining FM IFs as well? That's would make a total of five cans to work on...

(I'll get the AM side sorted first, then decide)