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I’ve used GT309D/V (lower gain) no problem. it just needs appropriate resistor to set the bias.

After my first build, I switched over to a DC Jack that mounts from the inside for this reason. I am using the Same Sky PJ-064, and there is also the PJ-011, which is slightly larger (but more common). I suspect there is a Lumberg version and the PJ-011 style is ubiquitous on AliExpress...

I would definitely just go with rear-mounted panel controls. It's typical in a guitar effect pedal to mount the controls on the opposite side of the board from the components. In my experience you don't need to edit any footprints in KiCad, you just need to select the item and in the pop-up...

So the schematic diagram is correct - the LED is not directly connected to the switch and so you can connect it in your circuit however you would like. It looks like you need the footprint for this switch to use in KiCad so that when you start a PCB, it positions the pads for the LED that is...

I have no experience on this circuit, but when I have this sort of problem, I start following a test signal through the circuit. It seems like you are describing clipping noise, which you should see on your scope. I would start at the audio output and establish an input signal that shows me some...

I'm always interested in finding new vendors - who was carrying violet diffused?

Just found this thread, and synchronicity... 1. I was playing around with BJT to J113 last weekend to see how the J113 behaves going into fuzz like distortion. I was totally unaware of this precedent and hadn't started adding in the tone controls, but now I have something to consider. In my...

In the (more) budget world of testing (perhaps) the FNRIRSi LCR-P1 comes with an SMD adapter that can also be plugged in to a breadboard, if you don't trust the LCR-P1's results for jfets.

I am waiting on an order I placed a week ago. The shipping and handling costs jumped up to $38, but I also ordered more enclosures so I expect the weight was higher. Doing the math after reading above, I think that the services (drill and print) may not have been included in the value of my...

I am setting up to build my next iteration of my Rat clone (Terrier Review) and decided to breadboard the basic Rat circuit from ElectroSmash, so I could evaluate alternatives to the LM308 OpAmp and the filter behavior. I was working from the ElectroSmash ProCo Rat analysis, but with my own...

As a slight aside: I was breadboarding up my own version of the Rat circuit (what happens when the board is out of stock, @Robert ) and actively exploring alternatives to the LM308 for my future Rat builds. With only minor tuning I can't hear or see (ADC into Max/MSP and FFT) the difference...

I finished a rat clone in July (Build Report) using an LM308N DIP purchased from Jameco (Link). I never really thought about whether this was real or not, so I went and pulled the chip. Using the test posted by @Chuck D. Bones, I found the supply current for my chip is 740-750 µA, which looks...

Like others noted that this is normal. It takes a while for the Ge transistors to warm up, and they will change as the temperature changes. Generally speaking, though, it looks like you were dropping into the right bias voltage area. Were you able to trim it to the midpoint of your power supply...

I bought the PEBA crimper at Amazon and this set of cheapie JST-XH connectors, and they have worked fine for me. I have since bought some additional sizes of "real" JST-XH pins and headers from Mouser.

Can you see of you have a solid connection from your footswitch to the PCB conectors.This may be perfectly fine, but I do put more solder on my footswitch daughterboard so that the switches are solidly encased in solder.

Howdy! I have been breadboarding this circuit in preparation for committing to the PCB and had a similar problem. What I have learned is that, for lower gain Germanium transistors, it's necessary to adjust R4 (100k in the build guide) to get the voltage down to lower levels. A significantly...

You probably have a continuity tester - a setting on the DMM that beeps when you short the leads. Check that the footswitch contacts are closing properly in each setting. So for the 3PDT footswitch, you should find operating the switch alternates connections between: 1-2,4-5, 7-8 and 2-3, 5-6...

FWIW I have this circuit on my breadboard, and with Russan MP21E. What I have found is that R1 (in the Sunflower Fuzz build docs, R4 in a standard Fuzz Face circuit) has a much bigger impact upon trimming the Q2 C bias than the bias trim pots above R3. I put a 100K trimpot at R1 and trimmed...

That explains why the sound on these little UFOs is out of this world. :p