Epoxy for RF Application

[W1EUJ]

Broken bandswitch wafer on a reciever that I really like. I've used thin CA to assemble it back together. I'd like to find a low-loss epoxy to apply to the cracked areas as well.

Any recommendations?

[WA1GFZ]

echobond 45 (not sure of the spelling but I fixed a switch with it once.)

[k4kyv]

I use a brand  called Two-ton Crystal Clear epoxy.  Don't remember what company makes it, but last time I bought some it was available in most hardware stores.  I read somewhere that it has excellent rf dielectric characteristics.  I have used it to repair badly crumbling insulation on KW size air core coils like the HDVL series and it has never heated up or shown any deterioration with rf.

It is slow curing; it needs to sit over night before handling the object.  It comes in twin syringes, which makes it easy to mix, but to get it to come out in equal amounts I always seem to have to put more pressure on one piston than on the other.

Avoid stuff like JB Weld that contain fillers that may not be good rf dielectrics.