[BC] RF gasketing or not on old CCA

[Jerry Mathis]

I've got an old CCA 25 KW FM transmitter in standby service. When they built
these, they didn't use an RF gasket or spring contacts on the RF cavity
door, they just had bare metal-to-metal contact with the standard Dzus
fasteners. The door and its mating service are now heavily pitted, and most
of the Dzus fasteners around the tube cavity section are burnt off. Needless
to say, the transmitter is not stable operating this way.

Has anyone had success trying to repair a situation like this? What did you
do? I'm thinking of adding an RF gasket and getting new Dzus fasteners. BTW,
where can you get these, inlcuding the part that mounts on the cabinet? Do
they come in sizes? If so, how do you pick what size you need? And what type
of gasket would you recommend? I've seen at least three different types. I'm
considering the kind that has wire woven into a fabric. It looks kind of
like Scotchbrite, or a felt pad.

The transmitter is still very functional outside of this problem, so I want
to fix this if possible.

-- 
Jerry Mathis