Speedball just finished - two voltage readings off.

[drewhaynes]

I got to the final step of the speedball upgrade... but it indicates that OA and OB should be reading 75-100V... OA is reading 118V and OB is at about 115V. Everything else has measured as expected, all 8 LED's lighting up, etc.

Should I try headphones? Is this a bad sign?

Thanks!

Drew

[Paul Birkeland]

How are OA and OB on the small PC board?

[drewhaynes]

OA = 82.5V
OB = 83.5V

These are on the small board hovering over the small tube.

[Paul Birkeland]

You should be OK to use your amp.
-PB

[drewhaynes]

Awesome! Look forward to trying it tonight. I tried to be careful and my soldering has much improved since the original Crack build. I wonder why those two terminals (OA OB) are reading higher than spec!

[Paul Birkeland]

They react a bit to the voltages at OA and OB on the front board, along with the actual 6080 itself, so there's some room for those voltages to move around a bit.

[tsh]

Similar situation here: on the large board OA=112V, OB = 116V, on the small board OA = 81V, OB = 78V. Can I consider it normal? All other readings are within tolerances. My mains voltage is 230V.

[Paul Birkeland]

Yes, no problem there.