Mike McLane
Active member
I just built a modded Ambassador (see below) that comports to the schematic I submitted in the previous post (but no B500K trim). I am not getting any output and it appears that the problem is with B+ voltage. I have taken readings at the points shown on the right below, dbl checked all component values on resistors/caps/inductor and swapped out the NE555. The 9vdc (+/-) readings are consistent with my Particle Accelerator, but the 19v (+/-) readings are all 250v (+/-) in the PA (UPDATE: the upstream side of C1 is also 19.1v so its just replicated throughout the rest of the circuit). Any suggestions?
![Amb PCB DC30 mod.jpg Amb PCB DC30 mod.jpg](https://forum.pedalpcb.com/data/attachments/58/58222-828d980a6792b2334f863bb95c50175c.jpg)
![Ambassador tshoot.jpg Ambassador tshoot.jpg](https://forum.pedalpcb.com/data/attachments/58/58224-221f0c804bbcee9b112ab8ea3efefddd.jpg)
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