Cosmosound Distortion Whau-Whau Repeat pedal

[rankot]

Hi guys, I stumbled upon this schematic somewhere on the Internet. Not much info on this pedal anywhere, but I can't figure out what is this "Repeat" section doing.

Distortion looks like regular Fuzz Face, Whau-Whau is a Wah, but what is this Repeat? 



There's some info and pictures here: http://www.effectsdatabase.com/model/cosmosound/distortionwhaurepeat#pictures. However, it doesn't seem to have some kind of tape echo inside. I'm puzzled.

[radio]

Wasnt  "repeat" in this peroid the expression for "tremolo" ?

[rankot]

Maybe, I don't remember that period

[DiscoFreq]

Wasnt  "repeat" in this peroid the expression for "tremolo" ?

"Repeat Percussion", tremolo with a very hard attack (reverse sawtooth wave), it really sounds a bit like a kind of delay on a very short note and I often had to demonstrate that it's not really a delay :-)

[PRR]

The funny transistor is a unijunction which makes a ramp-wave oscillator.


The down-spike of the unijunction turns-on the transistor to the left and shorts the signal. Transistor to the right makes-up losses. It is a non-sine tremolo.

[iainpunk]

The funny transistor is a unijunction which makes a ramp-wave oscillator.


The down-spike of the unijunction turns-on the transistor to the left and shorts the signal. Transistor to the right makes-up losses. It is a non-sine tremolo.

i used a discrete BJT UJT as the main part of the oscillator for my drum machine, heavily modified to create a kick drum, haha
but here is a simple replacement oscillator if you can't find a UJT. change R1 to a 100K pot and a 5K resistor and change the capacitor to 10uF



cheers,
Iain