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
Danelectro - The Breakdown

Last post by Bernardduur « Today, 08:32
Replies: 2
by Bernardduur » Yesterday, 22:20

Rating: 0.6%

I always liked the original Univox Unidrive; I once had one in for some TLC and since then I tried to make a good sounding clone. But all just didn't give the same vibe as the original.

Jump to this Danelectro. I love this pedal! It brings me back to the time I played with that vintage pedal and does sound alike

I traced the unit; here's the schematic

Danelectro - The Breakdown.JPG

Enjoy! More pics on my blog; check the link in the sig!

2 Replies

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View the latest post Re: Danelectro - The Breakdo …
Last post Bernardduur
Today, 08:32
CORLAND K25 - 1979 Amplifier

Last post by mauman « 15 Sep 2024, 21:46
Replies: 7
by FaustoM » 14 Sep 2024, 18:53

Rating: 1.7%

Hi, I get this Italian amplifier that need some attentions :-) !
Overall it's working and the sound this is producing is pretty good

Volumes pot need to be replaced because need to get retentions after 50 years of service...
I traced the EQ circuit (see pictures)
Unfortunately I have lots od 100K pots but no-one 47K

Can you pls
1) have a check on my retro engeneering and spot me any mistake / adjustment
2) switching the 47K pots for 100K pots which parts should be replaced ?

Thanks on...

7 Replies

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View the latest post Re: CORLAND K25 - 1979 Ampli …
Last post mauman
15 Sep 2024, 21:46
Biyang - FZ-7 fuzz (also Akai, Collins, Eagletone, Richtone fuzz)

Last post by Bernardduur « 14 Sep 2024, 14:50

by Bernardduur » 14 Sep 2024, 14:50

Rating: 1.1%

I was eyeing one for some time. The sound is like a muff but with more mids and a great selector switch.

EnjoY!

Biyang - FZ-7.JPG

More pics can be found on my blog; check the link in the sig

0 Replies

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View the latest post Biyang - FZ-7 fuzz (also Aka …
Last post Bernardduur
14 Sep 2024, 14:50
Nux Hg5 schematic

Last post by phantombox « 13 Sep 2024, 00:44

by phantombox » 13 Sep 2024, 00:44

Hi guys.
Any idea where to find a schematic for a NUX HG5 pedal?
Thanks in advance.

0 Replies

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View the latest post Nux Hg5 schematic
Last post phantombox
13 Sep 2024, 00:44
Howard Davis Deluxe Electric Mistress Mod

Last post by blueduck577 « 12 Sep 2024, 02:04
Replies: 6
by DEM81 » 25 May 2016, 14:48

Rating: 1.3%

I had this done a while back. This was the mod that was intended to make the Deluxe model sound more like the original Electric Mistress. This was done to my 1990s V4 electric mistress. He removed C3 and C20, and put a .0033uF cap between the points connected with the red line (see attached image). As far as I can tell those were the only changes.

What was the effect? The sweep sounded a bit more airy and whooshy. Kind of neat, if you care.

The schematic for the V5 version (with the wall...

6 Replies

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View the latest post Re: Howard Davis Deluxe Elec …
Last post blueduck577
12 Sep 2024, 02:04
Rockman X100 - Make it a DIY Pedal

Last post by J4mes « 11 Sep 2024, 18:34
Replies: 211
by FeVeR2112 » 28 Oct 2020, 23:44
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Rating: 13.2%

I have been wanting to do this for decades.... Make a pedal that has the Rockman Distortion sound. The chorus and echo would be other pedals.

I would like to collaborate with those willing to on this forum in creating a circuit that can be used in a pedal format.

The compression and fixed EQ sections seem to have the greatest influence on how 'that' sound is produced. The pedal version would have controls for gain, level and perhaps some EQ tweaking control. A foot switch for Edge / Dist...
211 Replies

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View the latest post Re: Rockman X100 - Make it a …
Last post J4mes
11 Sep 2024, 18:34
KODA - KD-28 Distortion [schematic]

Last post by Bernardduur « 10 Sep 2024, 22:44
Replies: 2
by massaada » 22 Dec 2011, 17:53

Rating: 1.7%

This is old Polish Distortion Plus.

2 Replies

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View the latest post Re: KODA - KD-28 Distortion
Last post Bernardduur
10 Sep 2024, 22:44
Mosky Big Fuzz (Big Muff Pi / Tonebender / Booster)

Last post by howmuch « 10 Sep 2024, 21:47

by howmuch » 10 Sep 2024, 21:47

Rating: 0.4%

Had a quick look inside this one the other evening.
Light wasn't great for photos and I didn't do a full tracing.

Components match VERSION 9 NYC REISSUE BIG MUFF PI . First version with 3003 PCB. NPN transistors
on this page

Most of the component references match up with the Kit Rae schematic too.
Resistors are SMD.
All caps are full size, no SMD caps.
All transistors are full size 2N5088.
Clipping diodes are 1N6263
All pots are B100k.

Voice switch
============
Switches the C9 capacitor...

0 Replies

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View the latest post Mosky Big Fuzz (Big Muff Pi …
Last post howmuch
10 Sep 2024, 21:47
EHX - Attack Decay 5300 [schematic]

Last post by Fernando JFET « 10 Sep 2024, 01:37
Replies: 67
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.
67 Replies

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View the latest post Re: EHX - Attack Decay 5300
Last post Fernando JFET
10 Sep 2024, 01:37
MXR RR-104 Randy Rhoads Special Edition Distortion+

Last post by modman « 09 Sep 2024, 13:56
Replies: 4
by rmroza » 30 Aug 2024, 13:28

Rating: 0.4%

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!

4 Replies

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View the latest post Re: MXR RR-104 Randy Rhoads …
Last post modman
09 Sep 2024, 13:56
Joyo - JF-13 AC Tone [schematic]

Last post by freefrog « 09 Sep 2024, 10:54
Replies: 102
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...
102 Replies

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View the latest post Re: Joyo - JF-13 AC Tone
Last post freefrog
09 Sep 2024, 10:54
DOD - FX69b Grunge - modifications

Last post by astrobass « 06 Sep 2024, 19:12
Replies: 83
by pinkjimiphoton » 05 Aug 2011, 02:28
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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
06 Sep 2024, 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
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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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

964 Views

View the latest post Re: Morley - Emerald Echo Bo
Last post dmc777
29 Aug 2024, 13:22
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

1315 Views

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

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