Hi Tuck
Okay R33 and R49 are the same then ?
Try measuring R33 with a multimeter and let us know what it reads
cheers
bajaman

R33 sure looks like brown black black yellow brown - 1 0 0 0000 and 1% = 1M

Hi bmxguitarsbmx I agree - there are some strange design choices made with this pedal as well as some really good design choices - the individual decoupling filters on each jfet stage and the 100n ceramic caps on each of the dual op amp power rails are excellent design choices where as the 18v dc po...

getting closer - R33 = 1M, R49 = 1M, R38 and R39 are both 2.2M (2M2)
amended file plus interim pcb top and bottom layers attached
cheers
bajaman

just in case you were wondering - the led is a four pin device - pin 1 is red anode ( compression level indicator), pin 2 is common cathode, pin 3 is blue anode (when drive channel is disengaged) and pin 4 is the green anode (when drive is engaged)
cheers bajaman

and - redrawn to make filtering clearer
cheers
bajaman

Okay - i have drafted and checked the complete board now so this schematic (rev 1a) should be correct, however there are still some unknown resistors that need to be measured or guesstimated, they are: R33, R38, R39, and R49 - again i am assuming that Tuck has labelled all the other resistors with t...

bassbutler rev 1.7z Hello Tuck I am still working on this but so far this is the revised schematic for the complete clean channel - the drive channel looks ok at this point except for the footswitch connection ;-) Anyway here is the revised clean channel tone control and compression section - the D...

Well done Tuck - not too shabby for a newbie to tracing :-) However, sorry, but there are quite a few mistakes - the input Jfet buffer is fine but the circuitry around IC2a and IC2b is a calamity - the treble control and bass control are vice versa and the feed off to the compressor section does not...

Oh Oh - a member tried to build this pedal and had some problems with the tone control not functioning correctly - after checking I discovered mistakes in my schematic - my sincere apologies - here is the correct tone control stack schematic Once again my apologies cheers bajaman amended tone stack....

WOW
it was originally posted in 2015 and still no schematic ?????
This surely must be a record for the longest procrastinated trace on fsb
lol
bajaman

"By any chance is there a video or audio examples of this build ?" - not yet sorry - but if you get it working please feel free to post a demo
cheers
bajaman

there is no 9v connection to the transistors - the vero layout is a little confusing because the base leads are shown on top of the transistors instead of underneath them - but it does say to snip the collector leads off - if you study the schematic you will see that both transistors have there emit...

Any of you lovely folks using Sprint care to convert a few (2-4ish) ".lay" files to something...usable for me? Nothing against your preferred program, it just doesn't appear to use a file format that will play nice with any of what I have available (Eagle, KiCad, DIYLC) for opening the fi...

1.6k - NO

can't hurt to fit it

check again

check the 7805 regulator

Great preamp - a friend of mine used one of these way back then - nice Marshally sound

I never use his Russian tubes - inconsistent emission qualities in most of the 12AX7s I have tested - I have measured many brand new Russian tubes that have less than 10% emission - sadly the JJ Slovakian tubes are a little inconsistent too, BUT, no where near as bad as the Russian tubes - the Shugu...