Joben Magooch
Well-known member
Hi all, just a few (hopefully) quick questions for the Son of Ben.
1. Can anyone confirm to me the correct pinout/orientation of J201 mini-PCBs? I ordered a few from Aion. It looks like the proper orientation (assuming the power, I/O, etc is facing up/north) is for the J201s to go D/S/G (L-R). Maybe a silly question, but would there be any reason why you couldn't flip the mini-PCB 180 degrees end-over-end so that the component is facing down ('white' side up) so long as D/S/G are still aligned correctly? Or would it make more sense to keep the component facing up and bend/angle the header pins so the trimpots aren't obstructed? Hopefully my pictures make it clear enough, lighting was kind of crummy.
2. Build docs mention that C10 (10u electro) is optional and was only used in the first ~100 units. First off: any pros/cons to keeping/omitting it? Just a bit curious as to what it is doing (or not!). Second: If omitting, should the C10 pads be jumpered?
3. I've never done any builds that required biasing any components before. I thought there was a thread on how to bias this one but I've not been able to find it... per the schematic it says "adjust trim 2/3 for 4.0v on drain of Q2/Q3". So just kind of walking through it/thinking out loud: get everything assembled, give the pedal power...set multimeter to volts DC, then probe red to drain and black to ground and adjust trimmer until it reads ~4.0v? That seems fairly straightforward to me (unless I've missed something), but for Q1 it says "adjust to 2k ohm" - how would I go about doing that part?
1. Can anyone confirm to me the correct pinout/orientation of J201 mini-PCBs? I ordered a few from Aion. It looks like the proper orientation (assuming the power, I/O, etc is facing up/north) is for the J201s to go D/S/G (L-R). Maybe a silly question, but would there be any reason why you couldn't flip the mini-PCB 180 degrees end-over-end so that the component is facing down ('white' side up) so long as D/S/G are still aligned correctly? Or would it make more sense to keep the component facing up and bend/angle the header pins so the trimpots aren't obstructed? Hopefully my pictures make it clear enough, lighting was kind of crummy.
2. Build docs mention that C10 (10u electro) is optional and was only used in the first ~100 units. First off: any pros/cons to keeping/omitting it? Just a bit curious as to what it is doing (or not!). Second: If omitting, should the C10 pads be jumpered?
3. I've never done any builds that required biasing any components before. I thought there was a thread on how to bias this one but I've not been able to find it... per the schematic it says "adjust trim 2/3 for 4.0v on drain of Q2/Q3". So just kind of walking through it/thinking out loud: get everything assembled, give the pedal power...set multimeter to volts DC, then probe red to drain and black to ground and adjust trimmer until it reads ~4.0v? That seems fairly straightforward to me (unless I've missed something), but for Q1 it says "adjust to 2k ohm" - how would I go about doing that part?