Ghost Effects Silicon Pep Box

A version of the WEM Rush Pep Box which was manufactured during 1966-1967.

I borrowed a very rare original unit from Tim Felton (Broadcast/Seeland) to confirm the circuit and the component values for this pedal.

Quite a full on treble heavy 1960s Garage fuzz sound, with more subtle tones as you turn the 'Pep' down.

I would describe the sound as having the rasp of a Maestro FZ-1 and the sustain of a Tone Bender MK1, but overall a more synthy sound than both.

Uses 2 BC107 Silicon NPN transistors like the original.

An output capacitor 'Tone' control or capacitor switch can be added to the circuit if you want more versatility. With this the bottom end can be increased.

Cases are powdercoated by Bournes, with the labelling screenprinted by Missionprint, both local Birmingham based firms.

The Silicon Pep Box PCB was designed by Stu Castledine and professionally manufactured in the UK.



(I have stopped doing this version and now do the GTR PEPBOX, have a look at the Ghost Temporal Research section of this website).


Old design alongside the original unit the circuit was cloned from.


Small case version with Traffolyte labelling.


Ghost Effects Silicon Pep Box PCB.


Silicon Pep Box PCB PDF Guide