Search found 204 matches

by Solidhex
16 Dec 2011, 20:16
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Guild Foxey Lady
Replies: 43
Views: 15837

Re: Guild Foxey Lady

Looks like they were planning on doing a silicon version of the germanium Fuzzrite (or just cloning the silicon Orpheum) but then decided to raise the bias on the first transistor after they had bought all the parts. Hey we got boxes of 10M resistors... just solder one in parallel!
by Solidhex
14 Oct 2011, 18:51
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Astrotone - Fuzz [schematic]
Replies: 102
Views: 73239

Re: Astrotone Fuzz [schematic]

2N2222's
by Solidhex
24 Sep 2011, 05:46
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univox - Superfuzz [schematic]
Replies: 456
Views: 299895

Re: Univox - Superfuzz [schematic]

Is there an "octave off" switch mod worth doing? Sure. You'll need a DPDT switch. One pole should break the connection between the wiper of the expander pot and the electrolytic on the base of the 3rd transistor (the phase splitter). The other pole should break the connection between the ...
by Solidhex
06 Jul 2011, 19:48
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Vox - Repeat Percussion (V 809) [schematic]
Replies: 146
Views: 115092

Re: Vox - Repeat Percussion (V 809) [schematic]

R.G.'s suggestion about using the MPSA18 is spot on. I was using a 2N5088, switched it for a MPSA18 and the ticking greatly decreased.
by Solidhex
16 May 2011, 21:01
Forum: DIY Projects
Topic: Shin-Ei FY-2 Fuzz Box
Replies: 8
Views: 2059

Re: Shin-Ei FY-2 Fuzz Box

You need transistors with the ECB pinout for that layout. Either that or bend the transistor legs to fit.
by Solidhex
05 Jan 2011, 08:09
Forum: Parts & Tools Sourcing & Trading
Topic: Looking for "Way Huge-style" enclosures
Replies: 18
Views: 5088

Re: Looking for "Way Huge-style" enclosures

Would you guys say these enclosures are as easy to drill as a regular hammond enclosure?
by Solidhex
22 Dec 2010, 21:55
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Guild - FW-3 ( Fuzz-Wah ) [schematic]
Replies: 32
Views: 16617

Re: Guild - FW-3 ( Fuzz-Wah ) [schematic]

Here's my stab at it, The 1m is probably a pull down resistor for the fuzz switch. The 27k, 220k, .005uf cap combo is a tone filter. Providing lower impedance for the high end. That signal is always there when the pedal is engaged. When the fuzz is switched on you blend in that signal with the origi...
by Solidhex
11 Dec 2010, 06:04
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Sentry - Fuzz-A-Tort
Replies: 15
Views: 5986

Re: Sentry - Fuzz-A-Tort

Ah

Right on Boris. I really enjoyed checking out those schems.

--Brad
by Solidhex
25 Nov 2010, 20:09
Forum: Resistors & Potentiometers
Topic: Four terminal pots? What the...
Replies: 5
Views: 3396

Re: Four terminal pots? What the...

Yeah

The only pots I've seen with 4 terminals have one attached to the casing for grounding.
by Solidhex
25 Nov 2010, 19:57
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Sentry - Fuzz-A-Tort
Replies: 15
Views: 5986

Re: Sentry Fuzz-A-Tort (1968)

RnFR posted a Yugoslavian FZ-1 clone that uses OC75's where? please link...... https://www.freestompboxes.org/viewtopic.php?f=70&t=2679 if it is this.......it is posted by me :block: ... Boris I think they're referring to the Eastern European/Yugoslavian schematics RNFR posted on his blog back ...
by Solidhex
24 Nov 2010, 21:50
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Sentry - Fuzz-A-Tort
Replies: 15
Views: 5986

Re: Sentry Fuzz-A-Tort (1968)

These Fz-1a style pedals were very popular. The input and output caps (.001uf) must make it sound like an icepick though!

--Brad
by Solidhex
21 Nov 2010, 02:48
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: WEM, Watkins, Rush - Pepbox, Rush Pep Box [schematic]
Replies: 127
Views: 97074

Re: WEM, Watkins, Rush - Pepbox, Rush Pep Box [schematic]

I see a "25" on one and they're both electro caps so unless the "25" is the voltage there's a chance both caps are 25uf. --Brad Sure looks like the Voltage to me... We can't be sure about their value. They're 1µF in the FZ-1A I wonder if the silicon ones are actually based on th...
by Solidhex
19 Nov 2010, 05:02
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: WEM, Watkins, Rush - Pepbox, Rush Pep Box [schematic]
Replies: 127
Views: 97074

Re: WEM, Watkins, Rush - Pepbox, Rush Pep Box [schematic]

That looks like a Fz-1 without the input buffer, You got the 470k and the 1k5 on the first transistor. The Fz-1's attack control when turned all the way up is 50K in parallel with 22k in series with 2k2 (17.47K) hence the 16k resistor to ground on the base. The second transistor has different biasin...
by Solidhex
12 Nov 2010, 18:33
Forum: Boutique Stompboxes dissected...
Topic: Death by Audio - Octave Clang [traced]
Replies: 62
Views: 37170

Re: Death by Audio Octave Clang [traced]

In the last pics that John posted (the earlier model) you can get a clearer view of the IC. I have a LM741 that looks identical to the chip in the pic. Same logos etc. Also note the thickness of the pins. Pins 2,3,6, and 7 are all way thicker than the others. The LM386's I've seen don't have that. T...
by Solidhex
11 Nov 2010, 21:23
Forum: Boutique Stompboxes dissected...
Topic: Death by Audio - Octave Clang [traced]
Replies: 62
Views: 37170

Re: Death by Audio Octave Clang [traced]

The closest thing I've seen to it is this Gus Smalley "Simple Octave Up" circuit http://guitarwork.ru/electronic/firm/Octaver/Simple%20Octave%20Up.jpg The Octave Clang though as far as I could tell has an input cap blend going straight into pin 2 of a LM741 (thanks to John for spotting the...
by Solidhex
03 Nov 2010, 00:13
Forum: Printed/Published Online Designs
Topic: Acoustic 360 Fuzz
Replies: 45
Views: 23569

Re: Acoustic 360 Fuzz

Ah

Sorry about that. I searched the page for the word "germanium" so I didn't see it...
by Solidhex
02 Nov 2010, 22:50
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Ibanez - n°83 Fuzz
Replies: 22
Views: 9978

Re: Ibanez - n°83 Fuzz

ah

Good eye! I missed that one.

--Brad
by Solidhex
02 Nov 2010, 21:08
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Ibanez - n°83 Fuzz
Replies: 22
Views: 9978

Re: Ibanez n°83 Fuzz

Its nothing like either of those. The Ibanez Standard (fuzz machine) and Shinei are based on the "Superfuzz" 6 transistor fuzz. The 83 has only three transistors. There's what appears to be a germanium diode but not a back to back pair. Not sure what its role is. Do you know what the funct...
by Solidhex
02 Nov 2010, 07:25
Forum: Printed/Published Online Designs
Topic: Acoustic 360 Fuzz
Replies: 45
Views: 23569

Re: Acoustic 360 Fuzz

I've noticed no one has mentioned that the original Acoustic 360 uses a NPN germanium for "Q2" in the fuzz section. The section resembling the Fuzzrite. It was a 2N1306. You can't always throw in a low gain silicon and expect the same results.


--Brad
by Solidhex
19 Aug 2010, 00:35
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Kent WT-1 (Shin-ei) wah
Replies: 15
Views: 11408

Re: Kent WT-1 (Shin-ei) wah

All the parts look consistent with what they were using in those pedals back then. You'll most likely see the triangular Matsushita logo on the other side of those caps. Trace side looks undisturbed as well. Its probably from the same era as this FY-2 on the Uzzfay site which is in even cleaner shap...