Sandspur Fuzz(Not working when engaged)

[delackattack]

I have probed this thing a bunch and still cannot find the source of my issue.
When engaged and probed, the output jack produces nothing.

 

[MichaelW]

What transistors are you using and do you have them socketed? It could be something as simple as not having the correct pinouts on the trannies. Many of the NOS Russians ones have to have legs 2 and 3 switched. Or 1 and 2.

 

[delackattack]

What transistors are you using and do you have them socketed? It could be something as simple as not having the correct pinouts on the trannies. Many of the NOS Russians ones have to have legs 2 and 3 switched. Or 1 and 2.

I do not have them socketed but it could be the case that I may need to swap the legs

 

[Coda]

Which transistors did you use?…

 

[jeffwhitfield]

Yeah, I almost always socket just about every transistor for this very reason. Just never know if you have a bad one, different pinout, or what. Plus, soldering can easily damage them if you're not careful so...just socket the suckers and call it a day.

 

[delackattack]

Which transistors did you use?…

CDIL BC108 from GuitarPCB

 

[Coda]

CDIL BC108 from GuitarPCB

The pinout should be correct.

 

[Big Monk]

Voltages?

 

[Coda]

Voltages?

This. It may be a bias issue.

 

[HamishR]

Difficult to tell from your pic but it looks like you've connected the power leads to the LED connections.

 

[Coda]

Difficult to tell from your pic but it looks like you've connected the power leads to the LED connections.

I think they go to the LED…I figured it was the capsule type from LMS…

 

[HamishR]

Oh, I'm not familiar with those.

 

[Coda]

Oh, I'm not familiar with those.

Pre-Wired LED with Bezel - Hump Style - UV LED

Save time with a pre-wired UV LED. Positive and negative wires come pre-wired from the resistor--no soldering or shrink-wrapping necessary.

lovemyswitches.com

You may still be right, though…

 

[fig]

Can you post a picture of the off-board wiring?

You said the output jack produces nothing when engaged and probed. Does it work in bypass (I’m guessing yes, but just making sure)?

Do you find signal anywhere using the probe? (input pad of pcb)?

R4 appears to be a 4k7Ω instead of a 470Ω (may be my eyes, the pic, hallucination).