Recent content by Valiesh

Fancy build finished ! Can't wait to try this on rehearsal :cool:

Just finished mine ! Sounds amazing 🤩

Thank you so much for taking the time to test it out :) (Yes, my Nobelium is also equipped with a 390R instead of the 560R) It's really interesting. I think I need to learn more on how this SMPS design works because I'm still convinced somehow that the output voltage should be regulated...

With a B+ of 252.6 VDC I have 69.5 VDC for V1 and 197.1 VDC on V2 (plate voltage measured at pin 1). Have you already double-checked the value of R11 (V2 plate resistor)? Is it 18K?

Quick update. I've runned the same testing on my Nobelium build and stated the same phenomenon : The output voltage vary greatly depending on the input voltage. Approx. 254 VDC with 9V input and 318V with 12V input. According to @vigilante398 on the thread...

Thanks for your reply, I'd be surprised if my power supply had anything to do with it. After measurement, it delivers 9.32V (1Spot 9V 1700mA). Just for the sake of it, I tried it with an MXR mini-brick which has an output that delivers exactly 9.0V 800mA. The VDC on B+ is slightly lower at...

This is strange. After reading all the information I could find on this forum (and on Talkbass), it seemed to me that lowering resistor 560R (R6 on the schematic, printed R7 on the PCB) would increase my B+ voltage. I'm aiming for a voltage of around 320V, and I've read that a 390R resistor...