Modern Stompbox Effects (1975 - ...)

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

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DO NOT post requests or debugging in this forum. Please.

Last post by lolbou « 22 Nov 2009, 21:23
Replies: 1
by culturejam » 22 Nov 2009, 21:18

Pretty please, with sugar on top.

Don't post in this forum asking is there is a schematic or layout or info on XXX pedal.

There is a subforum setup for requests already. It is located here:
REQUESTS FORUM

Any requests posted here will be moved to proper sub forum, and I'll also make nasty remarks about your mother. :mrgreen:

also, if you have a problem with your build, post it in the WORKBENCH. these threads are for circuit analysis only. by all means, if you discover something we should...

1 Replies

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View the latest post Re: DO NOT post requests in …
Last post lolbou
22 Nov 2009, 21:23

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BOSS Book (pdf & mp3's)

Last post by The G « 15 Dec 2020, 15:28
Replies: 3
by The G » 15 Dec 2020, 15:02

Rating: 4.1%

Discussion is here

--------
Did a compressed version. Didn't noticed visual differences compared to the original.

The Boss Book.pdf

And the audio files:

01-AudioTrack 01.mp3
02-AudioTrack 02.mp3
03-AudioTrack 03.mp3
04-AudioTrack 04.mp3
05-AudioTrack 05.mp3
06-AudioTrack 06.mp3
07-AudioTrack 07.mp3
08-AudioTrack 08.mp3
09-AudioTrack 09.mp3
10-AudioTrack 10.mp3
11-AudioTrack 11.mp3
12-AudioTrack 12.mp3
13-AudioTrack 13.mp3
14-AudioTrack 14.mp3
15-AudioTrack...

3 Replies

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View the latest post Re: The BOSS Book
Last post The G
15 Dec 2020, 15:28
DOD - FX69b Grunge - modifications

Last post by astrobass « Yesterday, 19:12
Replies: 83
by pinkjimiphoton » 05 Aug 2011, 02:28
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Rating: 0.2%

hi guys,

was out earlier buying parts (what else) and stopped at a pawn shop, lookin' around...found a really cool old silvertone lapsteel, almost jumped on it...150 bux i didn't have.

anyways, as always, i asked if they had effects...

and they had one...a dod fx69b grunge.

don't close the window yet, tho. ;) it gets better.

i ask 'em what they want for it, they say what will ya give me?

so i, of course, being ever cheap, say 5 bucks.

he says eight. i say sold. i mean, for 8 bucks, ANY...
83 Replies

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View the latest post Re: so, i broke a new dod pe …
Last post astrobass
Yesterday, 19:12
Marshall - Bluesbreaker Vintage Reissue

Last post by george giblet « 04 Sep 2024, 21:11
Replies: 2
by modman » 01 Sep 2024, 16:23

Rating: 1.5%

with a thousand clones on the market, I think this really is the way to go... staying true to your own original

2 Replies

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View the latest post Re: Marshall - Bluesbreaker …
Last post george giblet
04 Sep 2024, 21:11
DemonFx Mag Echo guts…

Last post by dmc777 « 04 Sep 2024, 15:23
Replies: 2
by dmc777 » 20 Mar 2023, 03:49

Figured I’d take a few pics of this before I let it to. Not a bad sounding unit at all. Darker than most pt2399s based delays I’ve used but it has a darker vintage analog delay tone “think dod FX90 or any old Reticon units pushed to their max. Modulation was also nice. Just have too many delays. Only changed I noticed with the chips is a tl072 used instead of a burr brown. Even has voltage regulator and preamp trim.

2 Replies

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View the latest post Re: DemonFx Mag Echo guts…
Last post dmc777
04 Sep 2024, 15:23
Boss - OD-1 Overdrive [schematic]

Last post by jeepe « 02 Sep 2024, 07:11
Replies: 48
by seniorLoco » 17 Jan 2008, 01:25
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Rating: 5.2%

This OD-1 clone using a single chip ...just wanted to post it here 8)
The brief history of differant version from Boss.
OD-1A
Serial: 6400 - 6500
Marking of PCB: 052-281a
Switch: Transparent
Silver screw
OP-AMP: RC3403ADB

OD-1B
Serial 6600-8800
Marking of PCB: 052-281b
Switch: Up to 8400 transparency, from 8600 black
Silver screw
OP-AMP: Up to 8400 RC3403ADB, from 8600 uPC4741C (NEC)

OD-1D
Serial 8900- , 6 digit sticker
Marking of PCB: 052-281d
Switch: Black
Screw: 8900-0300, silver...
48 Replies

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Last post jeepe
02 Sep 2024, 07:11
Orange - Bass Butler [schematic]

Last post by tuck « 01 Sep 2024, 21:21
Replies: 193
by tuck » 07 Dec 2022, 20:53
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Rating: 44.3%

Hey lovers of the deep tone,
attached you can find my attempt to trace this big tank.
It's my second attempt to trace a pedal so please be kind. I used a continuity tester and the magnifying glass app with the flashlight of my cell phone to get it done. The schematic is made with Kicad.
Unfortunately I don't have a lot of knowledge in electronics. I don't now exactly which component is part of a feedback loop and which is a high pass etc or (and) especially for this pedal which component is...
193 Replies

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View the latest post Re: Orange - Bass Butler
Last post tuck
01 Sep 2024, 21:21
MXR RR-104 Randy Rhoads Special Edition Distortion+

Last post by theehman « 30 Aug 2024, 14:38
Replies: 3
by rmroza » 30 Aug 2024, 13:28

Getting this thread started as a new release that is getting a LOT of attention and I don't see any discussions yet on FSB!

3 Replies

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View the latest post Re: MXR RR-104 Randy Rhoads …
Last post theehman
30 Aug 2024, 14:38
Korg - Pitchblack Tuner

Last post by Eugene « 29 Aug 2024, 15:14
Replies: 26
by Cow4prez » 23 Sep 2008, 20:24
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Rating: 0.4%

Pretty good tuner.

Binh

Guts:
26 Replies

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View the latest post Re: Korg - Pitchblack Tuner
Last post Eugene
29 Aug 2024, 15:14
Boss - DD-5 Digital Delay dry-Kill mod observation [schematic]

Last post by chongwui « 29 Aug 2024, 14:43
Replies: 6
by Dirk_Hendrik » 14 Feb 2012, 16:31

Rating: 0.9%

Have a DD5 on the bench with the request to add a dry kill. Did that one before a few years ago before I found a schem online. How? No clue. Developed that mod on the fly.

So, again. But now with a schematic. That's easy!
dd-5.gif

So, When one removes R34 the dry signal is gone. Problem is that there is no signal in bypass mode either because that's switched by Q4. Check, verified indeed, dry gone, no bypass signal. But... when the dry signal is switched by Q4 one would expect that it does...

6 Replies

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View the latest post Re: Boss - DD-5 Digital Dela …
Last post chongwui
29 Aug 2024, 14:43
DLS RotoSpin

Last post by dmc777 « 29 Aug 2024, 13:48
Replies: 1
by dmc777 » 29 Aug 2024, 13:44

FWIW…lol. I did get this second hand so I don’t know if the jumpers in there are normal. Great rotary. A lot of trimpots. IMG_6117.jpeg

1 Replies

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View the latest post Re: DLS RotoSpin
Last post dmc777
29 Aug 2024, 13:48
Rocktron Tru-Blend True Bypass Parallel Mixer (Gut shot)

Last post by dmc777 « 29 Aug 2024, 13:33
Replies: 1
by dmc777 » 05 Feb 2024, 15:50

Not bad. And he had at a good price.

1 Replies

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View the latest post Re: Rocktron Tru-Blend True …
Last post dmc777
29 Aug 2024, 13:33
Morley - Emerald Echo Box [schematic]

Last post by dmc777 « 29 Aug 2024, 13:22
Replies: 2
by andregarcia57 » 07 Aug 2024, 14:50

Rating: 1.1%

hello guys Second time that this pedal has been in my hands, this time I decided to take internal photos.
hugs 🎛️🎶✌️

2 Replies

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View the latest post Re: Morley - Emerald Echo Bo
Last post dmc777
29 Aug 2024, 13:22
Joyo - JF-13 AC Tone [schematic]

Last post by RAFALAMAO « 27 Aug 2024, 06:50
Replies: 98
by Steven_M » 29 Jun 2011, 21:02
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Rating: 11.4%

I think we all pretty much know what this is, but as I have one sitting here, I thought I'd take a few shots.

Outside.JPG
Outside is actually a really nice gold finish. Not at all cream, the way it looks on the website
Switch.JPG
I've seen this somewhere before... Not great soldering on the wires. I might have to beef that up.
Inside1.JPG
Underside Shot
Inside2.JPG

All of the pots that control EQ are 100Kb. I'll get some better pictures up once I get home.

Also, here is the shot from...
98 Replies

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View the latest post Re: Joyo - JF-13 AC Tone
Last post RAFALAMAO
27 Aug 2024, 06:50
1978 Deluxe big muff power supply issues and bipolar question

Last post by LaceSensor « 26 Aug 2024, 20:42
Replies: 9
by LaceSensor » 21 Aug 2024, 21:07

Hey everyone

I recently acquired a 78 IC deluxe big muff - the first version with the blend switch
Schematic is here

It came with a 110v transformer and plug, and Im in the 240v UK
So I took an EHX transformer from another 70s pedal I have (Clone Theory) and wired it up.
Pedal works as it should, to the best of my knowledge

Two issues however.
1 - ideally I want to get rid of the noisy transformer
2 - its getting quite hot in operation and Im not sure thats normal / risky. Not too hot to...

9 Replies

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View the latest post Re: 1978 Deluxe big muff pow …
Last post LaceSensor
26 Aug 2024, 20:42
Rockson Distortion - Not a Boss DS-1 Afterall

Last post by george giblet « 26 Aug 2024, 19:30
Replies: 6
by Goldschitter » 15 Jul 2024, 00:28

Rating: 0.9%

So I've been meaning to trace this one since the early 2000's but I just now got around to it. Far as I can tell everyone has always assumed it was a Boss DS-1 clone except for this guy:
It's definitely not, so out of morbid curiosity I was wondering if anyone recognizes the circuit or has any thoughts on the design. It sounds really good when it's engaged but the bypass switching circuit is trash, sucks out ALL of your tone. I haven't been on here in years but is Martin Soulsonic still...

6 Replies

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View the latest post Re: Rockson Distortion - Not …
Last post george giblet
26 Aug 2024, 19:30
EHX - Battalion bass preamp DI

Last post by G.Bisson « 26 Aug 2024, 19:11
Replies: 1
by G.Bisson » 29 Dec 2023, 19:45

Rating: 0.4%

Opened this pedal to explore a possible modification and documented everything inside while I had it apart.

I was interested in modding the pedal to make the compression on/off switch into a footswitch. There didn't appear to be any visible traces in the bottom middle area of the pcb that would have to be cut out to make room for a footswitch. After seeing the other side of the pcb, there are 3 traces going to the bypass footswitch that pass through that area. These 3 traces could be re-routed...

1 Replies

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View the latest post Re: EHX - Battalion bass pre …
Last post G.Bisson
26 Aug 2024, 19:11
Tortuga Effects Yeti = Triangle Big Muff

Last post by mauman « 26 Aug 2024, 14:58

by mauman » 26 Aug 2024, 14:58

Rating: 0.4%

I had one of these for a while, serial # 011 from 2009, and decided to trace it. I got far enough to realize it was looking a lot like a Big Muff, so I spot-checked the rest, and indeed it is. Starting from a stock Triangle BMP schematic, you can make these changes to get a Yeti:
Q1 - Q4 = BC239C
Add the AMZ Presence (mids) mod, except it's a 4-position switch instead of a pot, with the 4th position bypassing the Tone pot
Sustain pot is A100k instead of B100k
DC filter cap is 220uF...

0 Replies

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View the latest post Tortuga Effects Yeti = Trian …
Last post mauman
26 Aug 2024, 14:58
EHX - Attack Decay 5300 [schematic]

Last post by BMS1971 « 24 Aug 2024, 12:33
Replies: 66
by Professor SourTone » 18 Mar 2008, 20:32
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Rating: 4.3%

I bought this not working. It passes signal and the blend works, but no effect. I contacted Howard Davis and he says whatever it is he can fix it.
66 Replies

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View the latest post Re: EHX - Attack Decay 5300
Last post BMS1971
24 Aug 2024, 12:33
Voodoo Lab - Giggity [gutshots]

Last post by RiGLEY « 24 Aug 2024, 07:58
Replies: 11
by asperix » 04 Jul 2012, 22:36

Rating: 2.8%

Tried it out last week, but didn't like it with my setup so I mailed it back. Solid feeling pedal and the new plexi top is really cool. :thumbsup

IMG_1597.jpg
IMG_1598.jpg
IMG_1599.jpg
IMG_1600.jpg
IMG_1601.jpg
IMG_1604.jpg
IMG_1605.jpg
IMG_1604.jpg
IMG_1605.jpg
IMG_1606.jpg
IMG_1607.jpg

11 Replies

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View the latest post Re: Voodoo Lab - Giggity [gu …
Last post RiGLEY
24 Aug 2024, 07:58
Guyatone PS-001 Distortion

Last post by george giblet « 23 Aug 2024, 10:11

by george giblet » 23 Aug 2024, 10:11

Rating: 0.6%

I made some inroads towards tracing the PS-001 Distortion.

Turns out it is more than an MXR Distortion+ with a Muff tone control. Structurally it's more like a Boss DS-1.
(Given the similarity of the Guyatone PS-005 Overdrive to the Boss OD-1 it's not surprising there is some similarity to the Boss DS-1.)

Unfortunately there's some ambiguity regarding the tone control caps. (The two polyester caps on the middle-edge of the PCB where the wires are).

Enclosure:
guyatone PS-001 distortion -...

0 Replies

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View the latest post Guyatone PS-001 Distortion
Last post george giblet
23 Aug 2024, 10:11
Guyatone PS-005 Overdrive

Last post by george giblet « 22 Aug 2024, 04:26

by george giblet » 22 Aug 2024, 04:26

Rating: 0.6%

Guyatone made a large number of pedals by there's surprisingly few schematics.

I started off looking at the Guyatone PS-001 Distortion but there's not a lot of PCB pics out there.

In the process I found some info on the sister pedal Guyatone PS-005 Overdrive. At times people have tried to guess what this one is as well

I managed to trace the structure of the circuit. It looks like a Boss OD-1 (ish) circuit with a Muff Tone control. Unfortunately no values.
guyatone PS-005 overdrive -...

0 Replies

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View the latest post Guyatone PS-005 Overdrive
Last post george giblet
22 Aug 2024, 04:26
Rockman Guitar Compressor module

Last post by Yazoo55 « 20 Aug 2024, 21:35
Replies: 3
by Yazoo55 » 20 Aug 2024, 16:17

Rating: 0.2%

I’m tracing out the Rockman Guitar Compressor module, based on photos online, mainly from Reverb. I’ve traced out the main board but I can’t find good photographs of the gain reduction/sustain board connected via a ribbon cable. I have been able to identify a lot of the resistor values but capacitors are more of a problem.

If you have this unit would you be prepared to supply me with detailed photographs or confirm part values? I would be happy to share my schematics in return.

3 Replies

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View the latest post Re: Rockman Guitar Compresso …
Last post Yazoo55
20 Aug 2024, 21:35
Digitech - PDS 1002 Delay [schematic]

Last post by dperry « 20 Aug 2024, 10:16
Replies: 68
by ChrisFFTA » 29 Oct 2008, 02:51
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Rating: 1.7%

I bought an 'as is' one fo these the other day and it aint working... so... anywhere to source a schem for these pedals? Any help most appreciated.
68 Replies

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View the latest post Re: Digitech - PDS 1002 Dela
Last post dperry
20 Aug 2024, 10:16
ZCAT - Cat Fuzz

Last post by Bernardduur « 19 Aug 2024, 22:13

by Bernardduur » 19 Aug 2024, 22:13

Rating: 1.5%

I got this fuzz as I wanted to try another Germanium Fuzz Face sound.

It is a great fuzz face like pedal with germanium NPN transistors (MP38A)

I traced the pedal:
ZCAT - Cat fuzz.jpg

More info and pics on my blog; in my sig is the link

0 Replies

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View the latest post ZCAT - Cat Fuzz
Last post Bernardduur
19 Aug 2024, 22:13
Carl Martin Match Box A/B Switch (photos, schematic)

Last post by mauman « 18 Aug 2024, 16:48
Replies: 3
by mauman » 05 Jul 2024, 15:44

Rating: 1.7%

I got a Carl Martin Match Box in for repair and couldn't find any postings on it, so I took some photos and traced it. This is a two-input/one-output A/B switch, suitable for switching between two instruments or two signal chains.

The interesting part is the use of two LED/LDR pairs to switch between the two inputs without any pop or click noise. The pairs are the two black objects labelled A and B in the last photo. They are contained in heat-shrink tubes, and they were working fine so I...

3 Replies

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View the latest post Re: Carl Martin Match Box A/ …
Last post mauman
18 Aug 2024, 16:48

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