[Angus Kerr[_2_]]

Calling for help again

Thought I'd fire up the U67. It's been in the cupboard for some years.

No output. On further investigation, by removing the grille, I see the diaphragm is sucked into the capsule body, I guess it's unable to vibrate like it should and it's shorted out.

Power supply seems OK, 230V on the plate and heater at -7. I don't have a scope, so I'm not able to see the ripple.

Any idea where I can go to from here?

Thanks

Angus
Durban, South Africa.