[Amps] LK500 Amp Problem

[Adrian Rees (M1LCR)]

Hi all
We have an LK 500 Amplifier (the pair of 3-500Z's model) that started to
spark and arc quite badly last weekend when we tested it ready for IOTA.

We've had a look at the amp, and it appears that the varnish on the anode
choke has come off, and there are signs of tracking.

Given that it'll need re-winding, what you boys suggest I coat the choke in,
to stop it from unravelling ?

Any other comments ?

Adrian (M1LCR)