Folks:
I hope this request isn't seen as being inappropriate, but I could use some guidance as to how to set the bias on a Bride of Zen preamplifier pcb that I bought on ebay. For the record, I would note that it has been more than 20 years since Nelson Pass released the BOZ design, so it cannot be covered by patent. Still, I appreciate that I may be walking a fine line on this forum and apologize if anyone takes offense.
Nelson's BOZ article is based on his original design, which included a MOSFET on each channel and a 60 VDC rail. The board I've got uses jfets instead and the rail on this build is 24 VDC. Where should I be measuring and what is the ideal reading?
The photos were lifted from ebay; sorry about the resolution.
Regards,
Scott
I hope this request isn't seen as being inappropriate, but I could use some guidance as to how to set the bias on a Bride of Zen preamplifier pcb that I bought on ebay. For the record, I would note that it has been more than 20 years since Nelson Pass released the BOZ design, so it cannot be covered by patent. Still, I appreciate that I may be walking a fine line on this forum and apologize if anyone takes offense.
Nelson's BOZ article is based on his original design, which included a MOSFET on each channel and a 60 VDC rail. The board I've got uses jfets instead and the rail on this build is 24 VDC. Where should I be measuring and what is the ideal reading?
The photos were lifted from ebay; sorry about the resolution.
Regards,
Scott
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