B1 r2 proto or prod?

Last wires...
 

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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.” :eek:

Is there still plans to release this pcb? Is it compatible with the cinemags?
 
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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 :cheers:
 

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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.
 

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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.
 
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PCB

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 :cheers:

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.