as it says - Harald Sabro
Not Me

just put in in a metal enclosure and connect the enclosure to the circuit ground !

The 8r2 resistor needs to be connected to the junction of the 1N4001 and the 100uf capacitor surely ?

boards are available for the standard 16mm pots as mentioned in earlier post
cheers
bajaman

Bajaman, have you seen the the XL6019 voltage booster boards ?

Yes, i have used them - they work great at 30v
cheers
bajaman

Tassieviking
Just the cheap ones from Aliexpress - they work fine - it's only rock n roll
cheers
bajaman

Not built this yet - not even ordered any boards yet, BUT, I think it would be a lot easier to build with normal sized WH148 potentiometers and the components all mounted on the opposite side to them ;-) Those ridiculously small pots I used in my build are expensive and often difficult to source log...

should be linear pots

never had any problems with the xlsemi 6007 buck boost convertor - current draw is in this application is 6mA on one rail and 4mA on the other rail - stable as, even with full compression
cheers bajaman

Here are some build pictures for you all - I had to mount the vactrol on the other side of the board because of those tiny potentiometers - I used MC33178 chinese dual opamps, multi layer ceramic capacitors, metal film resistors etc and it sounds great - very low (no) noise and smooth sounding devic...

I have built this pedal and it is verified - works well too. I have a few spare boards available if anyone would like to build it - fits inside a standard 1590BB enclosure too ;-) email me: baja002steve@gmail .com if you would like a board I used an XLsemi 6007 buck boost converter to supply +15v an...

UPDATE: the rev2 schematic has a serious mistake - R8 should be connected to Q1 emiter NOT Q2 emiter
here is the corrected rev3 schematic
cheers
bajaman

Michael
If you are referring to the Orange part numbers, and running the circuit at +18v then Q6 pin 1 (source) definitely connects to the positive terminal of C23
cheers
bajaman

Tassieviking From the datasheet: the MC33178 consumes just 470uA per amplifier (or 940uA per package !) - call it 1mA ;-) If you use 8 of these the total current draw would therefore be less than 8mA ! An LT1054 would be perfectly adequate I used these on my build: https://www.aliexpress.com/item/10...

Hi Tassieviking I bought the MC33178 devices many years ago, but I recently purchased some from Aliexpress and was surprised that they seem to be genuine, in as much as they were just as miserly with their current draw and low noise. i used MLCC caps throughout except for the large power supply filt...

woops
That is how i meant to draw it - this should be correct now (hopefully)
cheers
bajaman

Thanks bmxguitarsbmx
I must admit i found the buffer strange - you are correct
Here is the revised schematic
cheers
bajaman

thanks Antigua I traced the board layout from the pictures - there may be errors - not sure of the squash and decay pot values but 50kA seemed to be appropriate - essentially the same as the bass butler detection circuit with minor component value changes - interesting buffer stage ;-) Will post the...

Hi - thanks for the analysis blackboarcult
The lower midrange prominence ( the broad peak around 350Hz) can be reduced by leaving the first source bypass capacitor only as 680nF
cheers
bajaman