Another question for electronics guys

[Monkeyleg]

I have a big (Super Reverb) Fender tube guitar amplifier. It developed a problem which most guys on a guitar forum think is the filter capacitors. I'm going to replace them, as the cost is only $20 for the five of them, versus a couple hundred at least for a tech.

Anywho, there's what looks to be clear silicone caulk between the capacitors now. I've never seen that. Does anyone have any experience with doing that? What's the purpose? Is it a special caulk, or just plain clear silicone caulk?

[RoadKingLarry]

Probably just something to physically stabilize the caps. When I used to do a lot of  pcb work we used hot glue but I've seen clear RTV stuff used. Shouldn't be anything special as long as you have the proper unicorn tears based solvents.

[Jim147]

The caps can vibrate around while your jamming. Hot glue and double sided tape are easy to use but clear RTV seems to be the choice product to use. It may be a cost and time thing. Just make them so they can't jump around when you get done.

jim

[Monkeyleg]

Makes sense. I'll add some when I replace the caps.

If anyone asks, I'll tell them that Cesar Diaz, Stevie Ray Vaughan's equipment tech, caulked all of the amp capacitors to help get SRV's special sound.

[RevDisk]

The glue is for stability. Whether during assembly, or for during usage. Or both.

Obviously, you tend to use non-conductive adhesive.

[CNYCacher]

Non-conductive is better at keeping in the magic smoke

[RevDisk]

Non-conductive is better at keeping in the magic smoke

Good point. Magic smoke retention is fairly high up the priority list.

[rcnixon]

Use the RTV that is aquarium safe. It contains less or no acetic anhydride  (the vinegar-y smelling stuff). It is safer to use around copper wiring and circuit board traces. There won't be any corrosion eating the wiring later on down the line.

Russ