Need diagram with labels of Crack tube amp

DirectAssault · 1272

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Offline DirectAssault

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on: December 19, 2017, 04:12:30 AM
I bought the speedball upgrade for my Crack headphone amp, but in the instructions references checking the terminals between steps of installations. Which makes sense. Not an issue.

Unfortunately, I dont have my original document for the OTL and my terminals aren't labelled anymore (I removed the tape years ago) so I was wondering if anyone can share with me the locations of the terminals so that I can do the voltage checks when I install the speedball upgrade.

Thanks!


Offline fullheadofnothing

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Reply #1 on: December 19, 2017, 04:38:31 AM
With the nine pin socket closest to you, the front terminal strip is numbered 1-5. The back terminal strip is numbered 6-10.

Joshua Harris

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Offline DirectAssault

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Reply #2 on: December 19, 2017, 04:43:37 AM
Thanks,

But the document for the voltage check refers to 'OA', 'IA', 'B-A/B', 'IB','OB', 'G', and 'B+'

Where are these?


Offline Paul Birkeland

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Reply #3 on: December 19, 2017, 04:44:15 AM
Those labels are printed on the PC boards.

Paul "PB" Birkeland

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Offline DirectAssault

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Reply #4 on: December 19, 2017, 04:50:04 AM
Right... zooming in on the image i can see the labels now.... i need bigger monitors.

Thanks


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