Speedball build help

chutracheese · 66

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Online chutracheese

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on: July 15, 2025, 05:19:03 PM
Hey everyone, I could use some help trouble shooting my speedball build. I've had the Crack built for almost a year. Love it. Works great.
I've completed the first part and the tests aren't correct.

Terminal     Voltage (DC)
OA                71.2V
IA                  185V
B-A/B            0V
IB                   185V
OB                  0V

Any ideas?


Online chutracheese

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Reply #1 on: Yesterday at 05:38:42 AM
All 4 LEDs are working on circuit board, however, only 1 of the 2 are working for the  12au7 tube.


Offline Paul Birkeland

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Reply #2 on: Yesterday at 12:21:54 PM
None of the solder joints on that PC board have been sufficiently heated.  Be sure you are using solder with lead in it (not silver bearing or lead free solder) and be sure your iron is turned up all the way.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

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