A few years ago I posted the actual hfe of Q1-Q4 from a 1974 Rams Bead Big Muff with FS36999 transistors as measured using a Peak DCA55. They were: Q4: 163, Q3: 214, Q2: 171, Q1: 160.

Since that time I've worked on three more pre-1975 Rams Head Big muffs. Two had FS36999 trannys and one had 2N5133 trannys. Guess what...they all measured less than 200 hfe, lol. The one with 2N5133 trannys were as follows: Q4: 132, Q3: 117, Q2: 145, Q1: 128. I also noticed Kit Rae posted some of his own...

Anyone know anything about this ?
An auto Wah :-

Looks like this thread got lost during the great downtime? Just a quick recap:

These are essentially rackmount versions of the Ibanez stompboxes of the 808/9/10 era (although many of them are subtly to very different) including an MN3007 based flanger and chorus and MN3005 based delay (at least by the AD9 days the Ibanez delay was 3205 based IIRC). The problem is that, without the pedal, you can't engage the pedal in any sort of way, it just sits there...

I've looked at the schematic, but the...

Hello all
I used to own a EHX bad stone witch had only transistors (8?) and no IC. Sold it long ago....
It kept me wondering if they was a schematic of it somewhere and if other phasers where made like this with transistors and not ICs.
Cheers
Benoit

Has anybody got any pictures of the ADA Ampulator circuit boards? I have got the schematics but these do not include a pcb layout. Pcb layouts were included in the documents for the Microcab which I built several years ago and these were really helpful when I did my one channel version. amnwsgwnfzrxec0ke5dw.jpg

Semi-scoured the net but came up empty handed. Anyone have one? Thanks.

Maestro FZ-1S guts:

analogguru

I found this on a Japanese web site. I'm pretty sure this is a Big Muff clone closely resembling this factory schematic: . I see at least one pair of clipping diodes and it looks like another hidden behind one of the electros. At least one electro is 1.0uF and at least one ceramic cap is 500pF. I'll bet the large greenies are 0.1uF. I did not check the resistor values. This pedal is made in Japan, according to the site, in 1970. Transistors are metal can Matsushita 2SC539 × 4.

Discofreq also...

GUT SHOTS:

I was just messing around on my breadboard a few days ago to try and build another Tone Bender MkII for myself with a load of 2N404's I received recently. I tried 10uf's like in the Marshall Supa Fuzz (another Tone Bender variant) in place of the 4.7uf caps and was blown away!! I was really surprised a few cap changes would make such a monster fuzz. Thick singing fuzz and sustains for days... I think I have a new favorite. Just wanted to share my joy. :D

Script, Block/no LED, Block with LED

Is the Block/no LED the good value option, or does it really have to be script?

I believe this one deserves its own thread.
Pictures can be found here:

This is what I've gathered so far:

C1: 12.5µF electrolytic
C2: 12.5 µF electrolytic
C3: 0.01µF (?), styroflex
C4: ?, styroflex, larger physical size than C3
R1: 1M
R2: 1k5
R3: 100Ω
R4: 10k
P1 (trimpot): ? (replaces 56k resistor; possibly 100k)
pep pot: 50? ???
volume pot: ???
q1: BC107
q2: BC107

9V battery

Any more infos/pictures/input anybody? Looks as if it might be closely related to the Tone Bender MKI.V/Fuzz...

enyone with trace side photo,or schematic?

thanks.....looks nice
boris

this is new version....

hi ,

anyone has schematic and/PCB of this pedal?

thanks for the help

Does anyone have schematics or traces of the old Electra Guitar MPC modules? Just picked up a nice MPC guitar, and would like to attempt to make a module board, but would like to first see the thought process behind them, as the guitar uses one 150K pot to control one parameter on the effect. Pretty simple, I'd assume.

Any help would be appreciated. I'd even buy a broken or functional module to work from.