Need diagram with labels of Crack tube amp

DirectAssault

New member
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!
 
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