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They can also be found at this site (Tayda is currently OOS on the 500k logs):

http://www.chonelectronics.com/product/500k-ohm-logarithmic-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm/

EDIT: found em on Tayda... my bad lol

http://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/logarithmic/1k-ohm-logarithmic-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm.html

Does anyone have a good suggestion of where to source mini potentiometers from? Like the kind used on Way Huge pedals with the small black shaft. An example would be the 100hz and 500hz knobs on a Green Rhino.

Brainwave #2:

Reverse the wiring and just wire the input through the I/O of the secondary tap then wire the output through the primary tap with the same hi/lo switch from center tap. Just hypothetical spitballing here but eager to try both ways.

So if I'm doing a schematic and/or pcb layout using the mini transformer at the input (Xicon 42TM019-RC per the Mouser site), it only uses the three taps of the primary (assuming I choose to wire up the center tap for 1/2 or full windings, which I am) and leaves the two secondary taps disconnected.

I have 2 questions regarding this:

1. Should I connect the two taps of the secondary to ground or just leave them disconnected?

2. Crazy Idea - wire the output through the secondary?! What may occur? From the datasheet, it looks like the 42TM019-RC only has a center tap on the primary, so the secondary would just be an in/out connection through the whole coil. Just wondering if this would affect the sound in any way. Going to try this and report back with the results. I've got a couple of these mini-trannys on order from Mouser scheduled to show up in about two weeks.

Thank you! 

Killer, this is exactly what I was after. Thanks guys!

I think I'm still using the 2015 library, link me to 2017 zip?

As we all know, fuzz face type circuits don't work well when placed after passive-buffered pedals (like an old Boss tuner) in the signal chain. I understand that they are supposed to react directly with the pickups with regard to input impedence/etc.

What I'm wondering is: is there anything that could be done to the circuit to make it so the fuzz face could be stacked after passive-buffered pedals with no odd/undesireable behavior? Even if it compromises the sound in some way?

I've already tried putting a TL071 IC/jfet unity gain buffer before the input, after the output, and both simultaneously with no improvement under said conditions. 

I'm thinking, maybe a small transformer before the input to mimic the impedence loading of a natural guitar input, therefore it could be placed anywhere in the chain with no ill effect.

Thoughts? Thank you

In the Madbean Eagle CAD library, there is a section called "enclosures". Are the enclosure selections in here meant to represent the actual size of their respective enclosures, or are they just a pre-sized PCB board to fit inside the enclosures?

Got it, thanks!

How do I add simple in/out/ground/etc. pads in Eagle CAD? I'm in the schematic view and I can't seem to find any in the madbean eagle library. There are In/Out ones in the supply pins folder but it seems that they do not attach an actual physical pad when I export to the board layout view. In the madbean library description for the In/Out supply pins it says:

"obsolete: use Mark instead and label net
output label without circuit board terminal/pad"

Any suggestions? As always thank you in advance

Hey Coda it's 43737, and it says "Kalamazoo Michigan" on the enclosure (heh, where I live!) I'm just down the road from the old Parsons St. plant. Pot code reads "1376801" which indicates Jan. 1968 if I'm not mistaken.


Thanks for the ideas guys, I'll try these and report back, will also try to post some pics this week.

I have a 1968 Maestro Fuzz Tone on my bench that I'm repairing for a friend. The problem with the pedal is that the volume is *severely* reduced when the effect is turned on, nearly to the point of being inaudible. I've checked with my multimeter that the circuit is receiving 1.5 volts from the AA battery and the battery is new. I've also confirmed that the polarity is correct for the incoming DC voltage from the battery. Finally, I've confirmed that the problem is not related to the input/output jacks or pots as I have cleaned and tested all of them.

Could the problem be a bad transistor? It has 3 PNP Germanium 2N2614 trannys. There are also 2 polarized electrolytic caps and various old-style carbon comp resistors, but everything looks to be in good working order with no visual indication of burnt resistors, bloated caps, or anything of the like.

I'm just wondering if this kind of badly reduced output volume is a symptom of a bad tranny. Any input would be greatly appreciated.

Thanks d00ds!

How about building something like this from the Beavis site?



There are no build instructions for it though and I'm not competent enough to design a circuit from scratch unfortunately.

I will also try the diode detector suggestion, thanks!