MXR Noise Gate vero layout (NOT FINISHED...) / Big Daddy vero layout

[Xavier]

This schem is killing me. I know I should have started by something easier, but I'm that stupid. 99% of the components are already placed, except for a resistor and a cap. Can anybody please check if what I've done is not a complete disaster? I'd like my first contribution not to be another fuzz, so...



Original schematic from Robin Tomtlund, as listed in the AMZ schematics gallery.

[Toney]

Has a cursory look at it.
I dont see the schem listed at AMZ, but I have the one I presume you are using.
Just a note that Tonepad also has a version of the MXR with a nice clear schem and a single dual OA.

Ok, by no means complete, but a few notes.

10nf cap fr S3 hitting  10u and diode-trace cut.
Need to specify fet pinout DGS? Number trans/fets Ics.
Move link to 10u, to junction of 22k/1k voltage divider
Collector of 1st Trans hitting fet-trace cut
Trans 2 Base/collector tied. Base /emmitter resistor is intended to operate via switch.
Need 150k res from volt div via 100k from fet to 2nd trans
Emmiter to gnd 2nd trans.
Ic1 pin 4 to gnd.
Ic2 10nf to pin3, 9v seeing pin 4, 1m/1m/10u to pin 3, pin4 to gnd.
Short circuit 9v to gnd wire link line 2 to 4.

Ok, don't give up..... the frustration you feel from non functional circuits is inversely proportional to the electronerd's joy of successfully firing up your first layout.
Your main issues are second trans and Ic2. Stop, go slow and carefully check every pin is getting it's nourishment . Check every node for unintended cross connections. Color code all ground and V+ lines, you can change them back when you are done. I think the trick is to work one section at a time mindfull of the big picture. A preliminary layout sketch is really helpfull. Plan the maximum size of your board and work from there.
Good on you for just getting in there and doing it. Perhaps you might want to do a couple of simpler ones first while you keep chipping away at this one.
Good luck.
Toney.

[Xavier]

Thanks for taking the time to look at it Toney. Yes definitely this is maybe too much for a first layout. Won't stop until I make it work. In the meantime, I did a simpler one too. Hope this one is right !!!

[Toney]

 Getting there.....
Typically, a J201 is DSG pinout. Gotta mark your intended pinout.
Trace cuts for first and second pins from top of trannie and Ic.
Pin 8 is drive 2 ,flip Vol 1 and 3, "9v" on line 2 "ground' on bottom line and your away.
Gotta think vero.......

[Xavier]

Getting there.....
Typically, a J201 is DSG pinout. Gotta mark your intended pinout.
Trace cuts for first and second pins from top of trannie and Ic.
Pin 8 is drive 2 ,flip Vol 1 and 3, "9v" on line 2 "ground' on bottom line and your away.
Gotta think vero.......

Done. Thank you again !!