[51] Leaky Buffer Prototype Pedal

Date: October 25th, 2007 | Comments : [6] | Categories: DIY.

Buffer prototype Buffer prototype

A couple of pix of my prototype of the leaky germanium buffer pedal. Click them for larger images. This buffer is good for use behind a fuzz face type pedal to buffer the output volume control. (or with any pedal that has a volume control that interacts with following circuits).

It also is useful to follow a wah-wah pedal to prevent interaction with the circuit following it, especially the fuzz face which can oscillate when driven by a wah. The buffer will prevent the interaction of the wah and fuzz. I suggest using the 470k resistors for R2 and R3 as mentioned in the mods.

Here are the previous articles on this pedal:

This circuit can be built on the AMZ Multi-Purpose board


6 Responses to “Leaky Buffer Prototype Pedal”

[293] Dan Says: 10:39 pm, February 11th, 2008

Looks great !

I built a similar looking configuration using Jack’s board – but i can’t seem to get it to work.

The wiring of your 3PDT looks very different from how I wired mine.

Would you mind posting your wiring diagram ?

Or email me directly at danielzink at gmail dot com

[294] admin Says: 6:54 am, February 12th, 2008

Test the board first without the switch to make sure it is working. If so, use the first diagram on this page:


Use only the left 6 lugs on the footswitch. The column of 3 on the right can be used for the LED.

One of the most common 3PDT switch problems is that you have mounted it rotated 90 degrees. The rectangular switch lugs should be going horizontal, not vertical.

[577] AMZ-FX Guitar Effects Blog » Blog Archive » Free AC128 Transistors! Says: 1:51 pm, December 15th, 2008

[…] below. Some of them may be suitable for fuzz or booster use, but no guarantee! Can be used for germanium buffers. Offer limited to US addresses […]

[638] thegnu Says: 6:24 pm, March 26th, 2009

So I’ve got a really old–housed in an electric wall box :)–Sirkut electronics ring mod, and the oscillator bleeds through even when the switch is off. The circuit is dead simple, using an 8 pin frequency analyzer, 3 caps, 1 resistor, and one pot.

I heard from the circuit-bent.com guy that you can maybe lower the input voltage and throw a buffer on it. Would this be the sort of buffer I would use?

Thanks, and I like your blog.

[1243] alfalfasprout69 Says: 10:42 pm, July 4th, 2010

Great Article!!!

i built a buffer i useat the front of my chain with your IC based circuit. it sounds great.

in my project i used a very small enclosure (2″ x 2″) and used two mono jacks with just a DC power socket seeming i want it “always on”. works great and dosnt take up much room on my pedalboard.

thanks again Jack!

[2365] tdale Says: 8:06 am, October 8th, 2011

I am building the GE transistor buffer my question has to do with Electrolytic vs ceramic caps. Should they all be electrolytic for C1 and C2. I have an EL in C1 1uf, and a ceramic in C2 with the installed as per schematic. should I replace C2 with an EL or can I keep the Ceramic?

Thanks -T


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