Active topics

Go to advanced search

Search found 19 matches • Page 1 of 1

Topics

Replies

Views

Last post

DOD - OD-250 (3 different versions)

Last post by dinowilliam « 5 minutes ago
Posted in DIY Projects
Replies: 37
by markm » 30 Sep 2007, 14:41 » in DIY Projects
1

2
Here's one of my Favorite Overdrives.
This circuit is a cousin of the Distortion + and it's rumored that the Distortion + is a variation of Dan Armstrong's Blue Clipper.

1977

Grey

The Grey version is from an official' DOD service manual from circa 1977/1978 that a fellow from diystumpboxes e-mailed me requesting a layout. I am unsure of it's accuracy but, he was happy!! :!:

***edit admin: here's schematic for basic reference***
37 Replies

19627 Views

Last post by dinowilliam
5 minutes ago
Interesting opinion on Jimmy Page/Early Zep Tonebender-FZ-1!

Last post by modman « 8 minutes ago
Posted in Vintage Stompbox Corner ( ... - 1975)
Replies: 62
by fuzzca » 18 Oct 2008, 19:17 » in Vintage Stompbox Corner ( ... - 1975)
1

2

3

4
I came across this thread on another forum and thought I'd mention it here for the sake of discussion.
The info is from Don Mare, pickup maker, musician.
Link to thread

The thread title is Closest Pickups to Jimmy Pages tele
don't fall in the tone Bender trap..

What was in a TB box was not at all a TB..
Jimmy liked that Tone Bender box best and emptied it out - then put the Rodger Mayer FZ-1 clone into the TB box himself - Jimmy did not really like the TB and was more used to older...
62 Replies

42134 Views

Last post by modman
8 minutes ago
Behringer's Boutique Bonanza...

Last post by modman « Today, 19:38
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 20
by modman » 23 Nov 2024, 15:01 » in Modern Stompbox Effects (1975 - ...)
1

2
You gotta be kidding me...
20 Replies

3251 Views

Last post by modman
Today, 19:38
Help with Qtron (+) mods

Last post by Lithium_Grim « Today, 17:34
Posted in Modern Stompbox Effects (1975 - ...)

by Lithium_Grim » Today, 17:34 » in Modern Stompbox Effects (1975 - ...)

Ok, I might intentionally have double posted this :D. I do apologise, but I think this might be of interest to more people.

I have some Qtron (+) mod questions:

1. Volume mod. I presume it would be done by adding a A10k in a standard way like this?

2. R32 mod. Is it the R32 as in the schematic of this thread ? And with what should it be replaced? I think it is already altered in this version as I read it was replacing the 100k with a 47k or lower. Am I correct?
3. Mix mod. Am I correct in...

0 Replies

26 Views

Last post by Lithium_Grim
Today, 17:34
EHX - Full Double Tracking Effect [schematic]

Last post by Dr Tony Balls « Today, 16:24
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 41
by Scruffie » 10 Oct 2010, 14:14 » in Modern Stompbox Effects (1975 - ...)
1

2

3
Hardly what i'd call a Modern Stompbox but the Schematic dates it as 3 years out on '75.

Anyway, here's a Redraw of the Factory Schematic for those of you with poorer eyesight. I think the Redraw is Correct I can't recall where I got the original Factory one from and nor can I confirm its Authenticity so if someone knows the link to that or if it's correct, that'd be handy.

I might see about converting it to 9V & V3205s as it's quite a nice simple looking Delay Project.

The EH Mans Article...
41 Replies

24635 Views

Last post by Dr Tony Balls
Today, 16:24
EHX - Q-Tron+ [schematic]

Last post by Lithium_Grim « Today, 10:13
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 14
by The Rotagilla » 01 Jan 2009, 00:26 » in Modern Stompbox Effects (1975 - ...)

I know the IP Police are hot on anyone posting current EH schematics but if someone has it and could PM me I'd be most appreciative.

14 Replies

11514 Views

Last post by Lithium_Grim
Today, 10:13
Boss OD-1 Vintage Issues

Last post by misterc57 « Yesterday, 16:50
Posted in Pedal Debugging & Troubleshooting Support
Replies: 8
by misterc57 » 16 Jan 2025, 18:56 » in Pedal Debugging & Troubleshooting Support

Hey Folks. New to this site. I repair old amps and occasionally old pedals.

Trying to understand and get this pedal working correctly.

The pedal is working but I notice the following

The red check LED does not light up. I believe it should be ON when the pedal is active. Or, maybe the older versions did not do this?

When running on a battery I see the full battery voltage at the board.
When running on a wall wort there is a 3V drop at the board which I trace back to the PS adapter socket...

8 Replies

287 Views

Last post by misterc57
Yesterday, 16:50
Voltage Trebler Current Draw

Last post by Lithium_Grim « Yesterday, 12:47
Posted in DIY Projects
Replies: 8
by Lithium_Grim » 12 Jan 2025, 14:28 » in DIY Projects

Ok so this is a known good design to get round 24 to 25V. However how much current will it be able to draw? Will it be enough to feed a Qtron+? Or will i need to place an extra separate LT1054 in parallel (as image below)?

8 Replies

522 Views

Last post by Lithium_Grim
Yesterday, 12:47
ONERR Mercury Distortion DST_2 traced schematic

Last post by EddieTavares « Yesterday, 12:33
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 8
by Manfred » 18 Mar 2020, 14:11 » in Modern Stompbox Effects (1975 - ...)

IMO a really good sounding distortion with a pretty good range of settings.
Heavy metal housing, good mechanical and electrical workmanship.
ONERR DST-2 Topview.jpg
ONERR DST-2 Knobs.jpg
OnerrDST-2_PCB_Componets.jpg
OnerrDST-2_PCB_SolderSide.jpg
OnerrDST-2_PotentiometerPCB.jpg
OnerrDST-2_Wiring.jpg
OnerrDST-2_PCB_Layout.JPG
ONERR DST-2 Schematic.JPG

8 Replies

2867 Views

Last post by EddieTavares
Yesterday, 12:33
EXH - Big Muff Rams Head 2N5133, FS36999 hFE notes

Last post by BMS1971 « Yesterday, 09:37
Posted in Vintage Stompbox Corner ( ... - 1975)
Replies: 26
by solderman79 » 02 Jan 2019, 01:26 » in Vintage Stompbox Corner ( ... - 1975)
1

2
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...
26 Replies

24938 Views

Last post by BMS1971
Yesterday, 09:37
Digitech PDS 8000 Echo Plus 1/2 and 2 second source [schematic]

Last post by pdspedals « 17 Jan 2025, 00:52
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 4
by Stevenrb718 » 18 Dec 2024, 16:30 » in Modern Stompbox Effects (1975 - ...)

The pedal works perfectly in 8 second mode. However, when I switch to 2 or 1/2, the effect doesn't work. When it kicks in, it basically doubles the signal overtop of the input, i.e. Just makes the sound a little warmer. There are no trails, echos, or repeats. The delay controls don't seem to change anything. The controls all work perfectly in 8 second mode however. I've recapped and swapped ICs. I get the voltages on the 4066 when sliding the selector switch. Interestingly, if I jump pins 3&4...

4 Replies

1073 Views

Last post by pdspedals
17 Jan 2025, 00:52
Warm Audio - Centavo 2022 and 2024 versions

Last post by Lani « 16 Jan 2025, 12:00
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 2
by modman » 14 Jan 2025, 09:07 » in Modern Stompbox Effects (1975 - ...)

another blatant Klon clone, nothing new under the sun...
But in V2 they introduce 3 extra transistors? One is a run of the mill 2N3906...
Pics snapped from this video

V1 2022
centavo2022.png

V2 2024
centavo2024_02.png centavo2022_sideview.png

2 Replies

373 Views

Last post by Lani
16 Jan 2025, 12:00
Peavey Backstage Plus 35W Guitar Amp [schematic]

Last post by DrNomis « 16 Jan 2025, 01:48
Posted in Amplifiers
Replies: 12
by DrNomis » 04 Mar 2015, 06:20 » in Amplifiers

Hi Everyone,

I've just recently been given a Peavey Backstage Plus 35W Solid State guitar amp for nothing, and I'm currently working on it to get it back to a useable state, so, what's wrong with it?

Well, the original speaker is a no-worker but the rest of the amp seems to work fine, I verified this by plugging my pair of headphones into the headphone socket, I get normal sound through my headphones but no sound through the speaker.... :thumbsup

I've managed to find what I think should...

12 Replies

10315 Views

Last post by DrNomis
16 Jan 2025, 01:48
Bell Electrolabs - ADT Automatic Double Tracker [schematic]

Last post by Nau72 « 15 Jan 2025, 18:54
Posted in Vintage Stompbox Corner ( ... - 1975)
Replies: 22
by krystal » 14 Sep 2022, 15:59 » in Vintage Stompbox Corner ( ... - 1975)
1

2
I thought this might be of interest. It's a kind of modulated doubling delay.
This particular unit is quite distressed. I've traced it to help debug it.
Switching and power are not shown. It has it's own plug, and i couldn't be bothered to follow the wires around a transformer and bridge rectifier etc. There's a couple of regulators for +15V and -12V.
I'm not very experienced with this stuff, so please take it all with a grain of salt.

It seems like a previous owner tried some...
22 Replies

62471 Views

Last post by Nau72
15 Jan 2025, 18:54
Ibanez BP10 - Layout debugging

Last post by Crodor « 14 Jan 2025, 21:32
Posted in Pedal Debugging & Troubleshooting Support
Replies: 1
by Crodor » 29 Dec 2024, 18:51 » in Pedal Debugging & Troubleshooting Support

Hi,

I made a vero layout of an Ibanez BP10 bass compressor, based on the schematics of GGG. I checked it several times but could not find an error so far. But my build does not work. I checked the layout again and did the typical soldering troubleshooting, but no success. So I give up and will do some other build. If anybody wants to continue and do some debugging - here it is for free use.

1 Replies

507 Views

Last post by Crodor
14 Jan 2025, 21:32
MXR - Carbon Copy [schematic]

Last post by Niquel « 14 Jan 2025, 18:04
Posted in Modern Stompbox Effects (1975 - ...)
Replies: 30
by blasq » 19 Sep 2009, 14:54 » in Modern Stompbox Effects (1975 - ...)
1

2
Hello,

I've been searching for schematic for Carbon Copy on net, but I didn't find anything.
anyone have a schematic for this box? Does it exist..?

Wojtek.
30 Replies

30052 Views

Last post by Niquel
14 Jan 2025, 18:04
Has anyone here tried any of these THT op amp replacements?

Last post by Jarno « 14 Jan 2025, 09:42
Posted in Pimp-My-Cheap-Pedal
Replies: 2
by speters33w » 13 Jan 2025, 07:09 » in Pimp-My-Cheap-Pedal

I am curious if anyone here has tried these. They are targeted to HiFi Stereo buffs on AliExpress (I assume Temu and Wish, also).
I actually ordered a couple of one style to goof around with.
OpAmpReplacements.png
I'm just curious if anyone has experience with their use in pedals.
This is the vendor I see most frequently with these:
HuaXinHuiDianZi Store
I mean, if they suck they suck and I'm out about $15 USD.
But I'm curious if anyone else has goofed around with them.

-Have fun!...

2 Replies

342 Views

Last post by Jarno
14 Jan 2025, 09:42
Landtone DIY Fuzz (Electroharmonix Op Amp Big Muff Pi 1977 Clone) Schematic [traced]

Last post by speters33w « 14 Jan 2025, 04:03
Posted in Boutique Stompboxes dissected...
Replies: 2
by speters33w » 11 Jan 2025, 14:24 » in Boutique Stompboxes dissected...

Hi all,

Here’s another traced Landtone (TTone, USDream) schematic This one is for the Landtone Fuzz.

LandtoneFuzz.png
LandtoneFuzzMarked.jpg

This one is component for component identical to the EHX Op Amp Big Muff Pi as drawn in this forum here , save the initial power noise shunting cap (C10 in my drawing, C13 in Gottfried Divos’), and the volume pot (10k-B instead of 100k-B). The pot is RK097 style if you would want to change it out. The cap is fine as it is.

I think the lack of a...

2 Replies

710 Views

Last post by speters33w
14 Jan 2025, 04:03
old-style PCB manufacturers?

Last post by theehman « 13 Jan 2025, 10:17
Posted in Parts & Tools Sourcing & Trading
Replies: 9
by theehman » 04 Jan 2025, 19:36 » in Parts & Tools Sourcing & Trading

Is there anywhere I can PCBs made that look old-style with brown phenolic and no solder masking?

9 Replies

748 Views

Last post by theehman
13 Jan 2025, 10:17

Search found 19 matches • Page 1 of 1

Go to advanced search