JTM45 build test voltages v3 off

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ndross475
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JTM45 build test voltages v3 off

Post by ndross475 » Sat Nov 02, 2019 6:55 pm

Just finished a Metro jtm45 kit,, got to installing the 12ax7s and things are amiss... Anyone have some clues for where I should look?

I followed the Valvestorm / Metro Jtm45 plan.

Attached is sheet of readings / targets. No power tubes are installed, got here and stopped.

Here is a link to a gallery of hi Rez images... let me know if you need more detail.

https://nickdross.smugmug.com/JTM45-Build/


I have been tracing the under boards and everything ohmed out. I used the sluckey method and came through the tops so I don't think any fell out...

Presence pot shows ground at the capacitor all the way to V3 everything is connected. I saw another post where V3 voltage issues were related to no ground, I don't think that's the case here...

Maybe I swapped a value somewhere, been checking that and haven't found it yet..

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