Failed voltage check. [tentatively resolved]

[andyh]

Both 173v

[Paul Birkeland]

OK, now measure the DC voltages between 3 and 2, as well as 4 and 2.

[andyh]

I did move the capacitor near 20/21,  and poked around with the diodes there as you was showing an interest in that area.

So out of curiosity as there is power there I've redone voltage check.

Results are

1 = 94.7v
2 = 172.9v
3 = 0.4v
4 = 173.6v
5 = 90.2

6 = 0.4
7 = 113.2v
8 = 0.7v
9 = 115.5v
10 = 0.4v

[Paul Birkeland]

You may just have a loose connection or two.  Those are working voltages, out of curiosity, can you carefully measure the voltages at A3 and A8?

[andyh]

Both 174v

[Paul Birkeland]

No, A3 and A8 wouldn't be 174V.  That is pin 3 and pin 8 on the 9 pin socket.  No pins on the 9 pin socket should read that high (although 1 and 6 will for about ten seconds when you first turn the amp on).

[andyh]

Sorry crossed wires excuse the pun,, is that 12u to a3, a8?

[andyh]

2-3 = 174v
2-4 = 0v

[andyh]

I think you meant 3 - a3       3 - a8  are both 1.5v

[Paul Birkeland]

Yes, 3 is a ground.  It looks like your amp is working properly now.  I would poke around with a wooden chopstick and a cheap pair of headphones plugged into the amp to be sure nothing causes a popping noise when you poke around in there.  If you have a loose connection and you poke it, you will get a pop through your headphones and that can help refocus your efforts.

[andyh]

Thank you so much for your help I really appreciate it.