The right channel stopped working. I thought it was the headphone jack so I desoldered, re-soldered a few times. I'm pretty convinced it is not the connections on the headphone jack. Tubes glow on both sides.
Crack has speedball. I went and did some re-measuring from the speedball manual. The small board passes all voltage checks.
On the large board, OA seems irregular/ fishy measuring ~125V. OB seems regular, but also measuring similar ~125V. Range is specified at 75-100V.
These could be red-herrings/non-issues and the one channel working may be something else. I can't really tell!
Any thoughts welcome.
Thank you
Chris