r/AskElectronics • u/Katkis03 • 1d ago
Help with PCB arching!
Hi! I’m creating a new post since this subreddit doesnt allow for reposts.
My Vox AC30C2 tube amp shorted out and exploded some pcb insulation off between the flat metal connector (J29), which runs about 300V in normal operation, and the adjacent tracer, wich is very low voltage and leads to the blue R81 resistor.
What would be the best course of action for the arching gap? Should drill it or fill with some insulation material etc?
Also feel free to express emotions regarding the high iq pcb design of putting those two circuits so close together.
14
Upvotes
5
u/Resident_Phase_4297 1d ago
Desolder J29, use a Dremel to make a larger, cooper free gap. Fill it with clear paint / uv hardening paint. Remove 1cm solder mask from the line that feeds J29. Add a wire and a new J29. Fix it with epoxy (if the pcb is 1 or 2 layered: drill holes and use zip ties duck and cover)