Building an Amp

Hole in wrong place

Under the pot with the switch is the hole for the bias pot.

That's not going to fit.

Measuring to drill a new hole.

The pot has too fit on the inside and on the outside of the chassis!

The new hole (red circle).

The old hole to the right of it.

Mounted the pot.

This will fit.

Connectied the PT to the mains. to check the voltages.

All voltages seem OK, a little high, but nothing connected yet.

No problems here.

Finally I made a discharge wire to discharge the filter caps. They have high voltages, even after power down.

I used a 10k Ohm resistor, 10 Watts.