Are PCBs available from anywhere for the B1 Rev 2?
Nope, I made them for personal use in Italy. The pcb maker is a User here in the forum.
Are PCBs available from anywhere for the B1 Rev 2?
bug boyz connected with Store, for Iron Pre
Iron in it is optional, and package is very good (never been too modest)
that's your B1 R2 on steroids
bug boyz connected with Store, for Iron Pre
Iron in it is optional, and package is very good (never been too modest)
that's your B1 R2 on steroids
I have the transformers and the fets that are waiting since 6L6 said on post n.3 in 2017 “ That buffer block is the basis of ZenMod's "Iron Pre". Prototype PCB for the store have been ordered.” 😱
Is there still plans to release this pcb? Is it compatible with the cinemags?
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Is it compatible with the cinemags?
Yes it is. ZM's pcb supports Cinemag, Edcor and Jensen transformers.
peppenino, would you share your schematic, BOM and gerbers?
Thanks
I'll make a complete BOM wirh parts I used in the afternoon. Schematic is the original Papa's one as he published on post #98 of this thread. I used the same parts numbers. Scafas user made gerbers and PCB, so it is better to directly ask him

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Output offset regulation.
Do I have to worry of 1,5V difference between the + and - rails? It would better to use two trimmer instead of fixed resistors in LT1084? Thanks in advance.
Do I have to worry of 1,5V difference between the + and - rails? It would better to use two trimmer instead of fixed resistors in LT1084? Thanks in advance.
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Are you able to get proper DC offset at output?
*nevermind, looks like what you’re showing with the pictures. If it were me, I’d go for the trimmers - if for no other reason than you could experiment with different voltage operating points.
*nevermind, looks like what you’re showing with the pictures. If it were me, I’d go for the trimmers - if for no other reason than you could experiment with different voltage operating points.
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Are you able to get proper DC offset at output?
*nevermind, looks like what you’re showing with the pictures. If it were me, I’d go for the trimmers - if for no other reason than you could experiment with different voltage operating points.
Thanks. Maybe multiturn 5K
PCB
Hello peppennino. I contacted scafas. He has boards to sell. But he wants $23 plus shipping for each. That's a lot of money for a simple one layer board. I'll have to think about it. I can get a B3 driver board for much less money, maybe even use it for the schematic.
I'll make a complete BOM wirh parts I used in the afternoon. Schematic is the original Papa's one as he published on post #98 of this thread. I used the same parts numbers. Scafas user made gerbers and PCB, so it is better to directly ask him![]()
Hello peppennino. I contacted scafas. He has boards to sell. But he wants $23 plus shipping for each. That's a lot of money for a simple one layer board. I'll have to think about it. I can get a B3 driver board for much less money, maybe even use it for the schematic.
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