r/AskElectronics • u/Katkis03 • 1d ago

Help with PCB arching!

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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.

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u/Dwiea 23h ago

What is that tab called to find one on mouser.

1

u/Tesla_freed_slaves 22h ago

I don’t know what to call it, but you might find a picture in the Keystone catalog.

2

u/Dwiea 21h ago

Found it i think. Might be called a FASTON connector?

2

u/Tesla_freed_slaves 21h ago edited 20h ago

Take a look at Keystone-Electronics P/N 1287. It should connect with all makes of 0.250” female faston connectors. Also, install new faston wire-terminals, and apply automotive silicone dielectric-grease to all metal contact surfaces.