Resistance question

[Paul Birkeland]

I am planning on connecting it to 20u and 21U. I'm doing this while leaving the stock 220μF 250V capacitor in place. This is referred to as the last power capacitor.

That's the first power supply capacitor.  The last one connects to 12/13.

The film capacitor is bipolar, so it doesn't matter which wire I connect to 20u and 21U.  Is this correct?

Correct.

Reading the forums here, I am picking up bits of information to put together. I figure it's better safe than sorry to ask.

Better safe than sorry!  Do be sure to do a voltage check once you get it installed just to be extra safe.

-PB

[BZ58]

You were correct, I had one black wire loose.

I have since switched out the output capacitors to Dayton 100uF 250V caps. Also installed the film capacitor to 12/13.

Voltage check following installation:

G and B+ check out fine. OA and OB both read 65V.

Is this OK? I haven’t used the amp yet.

If the range is about 75-100V at OA and OB, is the sound quality better if it falls between these numbers? Is the quality less if it’s a little less than 75?

[BZ58]

I kept at it, inspecting connections, rewetting connections, and finally voltages came out correctly.

Sounds perfect as could be.