So switching C1 to10n will allow more highs then adding the 100n in parallel will give you 110n close to the stock value

Same with C2 adding from 1 to 10n in parallel will roll off more highs

I like the idea of faceplates they look really good and anything that stops me having to sand an enclosure apply decals etc definitely appeals to me

Remove IC3 from its socket and let us know the voltages on the socket

I’ve only got the V1 build document which doesn’t have R11 but I’d guess R11 would be 1K max if for some reason you don’t want your volume to go all the way off

You could wire the in and out of the TT to the pads for lugs 3 and 2 of the tone pot to keep the volume pot.

You could wire the in and out of the TT to the pad for lug 3 of the tone pot and to the pad for lug 2 of the volume…Read more

https://www.yumpu.com/en/guitarpcb.com

It should if pin 2 oscillates

Try reflowing C8 solder joints

What PNP transistor are you using for Q5

I  wouldn’t swap out any components unless you know they’re a problem you risk lifting solder pads etc with too much heat

The IC3 voltages we’re most interested in are the input pins 2, 3 and output pin 6

Although I said the trimmer doesn’t directly affect the LFO voltages…Read more

Pins on the left hand side are numbered top to bottom and the right hand side bottom to top

The trimmer doesn’t directly affects the LFO voltage you can check pin 6 with your meter the voltage should oscillate

It could well be something simple like a poor connection or solder joint

The speed pot just controls the oscillation / modulation rate  have it set at a slower speed…Read more

With 5952s you should get phasing with the gates set from anything between around 1.7v to 2.3v, in my experience using 5952s the sweet spot is usually 2 to just over 2v but try from 1.5v and…Read more

The gate pin is the bottom one as circled in red below

As I say you only need to do Q1 all the 2N5952s gate pins are connected as you can see in the schematic

Start with TR1 in the centre position and move it in small…Read more

Did you use the trimmer to set the jfet gate voltages to just over 2v

They’re all connected so you only need to set one

If they’re not 2N5952s check the pinout is correct

If my transistors feel loose in their sockets I use a small croc clip as a heatsink and solder one pin into the socket

If your transistors are in sockets it’s a good idea to do this then there’s no chance of them falling out when the pedals upside down or accidentally knocked or whatever

Like this clip the croc clip on a pin…Read more

I’ve just noticed Q4 gate looks low that should be similar to Q2 with your voltage divider R16 and 17 around half supply voltage less the 0.4v drop through D1

Check the voltage you get at the two voltage divider junctions R8 and 9 and R16 and…Read more

Q3 and 5 look off to me but unfortunately I don’t have the circuit on hand to check voltages

That’s assuming your readings are EBC Q1 and DSG pin order for Q2 to 6

I’ve probably confused that a bit Q1 pins top to bottom are EBC, Q2 to 6 top to bottom are GSD

Check C8 and 12 negative…Read more

What voltages do you get on all transistor pins Q1 EBC and Q2 to 6 DSG take voltages with the range pot fully clockwise

I’d suspect a mis biased transistor from your fault description

Fets as you’ll know are all over the place even from the same batch the fact it changes…Read more

It does sound like a mis biased transistor what transistor are you using in the Q1 position

Apologies are definitely not needed we all learn as we go none of us were born making pedals

Enjoy your new creation

Manufacturer doesn’t make a difference for the BC549C

Meant to say I checked all your component values and orientation what I could see look correct

Post some nice clear in focus images of the component side of the pcb so that all component values and orientation can be clearly seen

With most Muff variants the transistor voltages will be more or less the same give or take a few mV

These voltages are from a general guitar gadgets muff

Voltage in 8.8v

Q1 – C  3.9, B 0.6, E…Read more

You only need to set gate voltage on one fet they’re all connected so if you set 1 you set them all

The most crucial thing is the fets are a matched quad set they’re being used as variable resistors

I’d try it…Read more

It’s a 500K trimmer code 504 you’ve got but it should still work use the trimmer to set the fet gate pins to just over 2v that’s the phasing sweet spot for 5952s because yours are J201s start there and adjust the trimmer in very tiny increments

J201s are not ideal for phasers they will work if…Read more

I still on occasion solder in the wrong value and that’s after almost 20 years of building and knowing the colour band values off by heart

It’s very easily done

Post some nice clear in focus images of your build so that all your component values and orientation can be clearly seen and offboard wiring traced

So you don’t have ‘bypass’ but the led works. Something silly is happening. Don’t fret yet.

I’m not an electronics expert by any means so checking resistances and/or pinouts on the opamp are a bit out of my league

You say you’ve checked resis…Read more

MathU41, They both invert the signal if that is important. Otherwise different, and a large (too large to inject in someone else’s post) rabbit hole , but well worth investigating.

A can be chosen when B just seems to happen too quickly. They both have the same results somewhere along the sweep.

The first 2 digits are significant numbers the 3rd digit the number of zeros so 51 with no zeros