> One of the switches on the top of the gear selector cover that allows the
> overdrive to function is flaky. I took out a shim and it makes better
> contact, but not a nice consistent low resistance. Sometimes a few ohms,
> sometimes a few hundred ohms, sometimes wandering as I watch.
> Can the switches be taken apart and contacts cleaned? If so, any gotchas
> before I dive in and bust something?
Personally, I'd just replace it. Not much to lose by trying to clean it ...
except a nice reliable OD !
There have been different designs sold as replacements over the years, I
don't know what would be original for a TR4A. The original TR3A switches
are hard to get apart without breaking the Bakelite.
Randall
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