Bobb_Lobblaw wrote: ↑22 May 2023, 01:42 The signal going in to R1 is strong..coming out the other leg it's severely dropped and muffled. I reflowed R1, I switched R1 out for another 220K and the same vol. drop/muffle happens.

IC1 may be faulty. Try another TL072 or a similar dual op-amp.

Also measure R24 (10 Megaohms).

Manfred wrote: ↑09 Sep 2021, 12:53 ...Also new is that the clipping diodes are now both germanium types, which are obviously matched.

Those are 1N60P schottky diodes.

I'm thinking about modding my GE-7 to add a clipping stage and make it essentially an overdrive with super control over the frequency response. Has anyone done this before? Any ideas on where to add a pair of clipping diodes? I've also thought about inserting a little transistor circuit (maybe an E...

...Power and tuner lights come on. I've confirmed that the power supply, and mute relay circuit is all working correctly. ...There appeared to be a very distorted signal at the opamp pin 7 output. ... So swapped it for an LM258. Now I have an output again from the buffer circuit. But again its very...

modman wrote: ↑14 Sep 2022, 21:51 ...all new stuff is always pro-silver only

I don't see 'pro-silver' in the seetings anymore. Board style only lists 'Boutique, Modern, Vintage'.

I have nothing to do with that red fruit brand devices
I found the culprit, favicon is missing only on 'vintage' board style. Is it a conscious decision?

Somehow missing for me. Tried 2 different web browsers.
Can you post the link to the icon?
Trying www.freestompboxes.org/favicon.ico results in "The requested URL was not found on this server."

Favicon is disappeared?

...Using an audio probe I listened at various points on the board while turning the effect on and off and here's what I found: Pin 2 of Q1: No fade. Pin 1 of Q1: Fade on. So I swapped out the transistor (I originally used a 2N3904) to a 2N5088. The problem still persists. Which one is 'Pin 1' of Q1...

Manfred wrote: ↑23 Jul 2022, 22:17 i searched the internet for the schematic but could not find it...

Is this a different thing?
SolidGoldFX Rosie schematics

Manfred wrote: ↑03 Apr 2022, 17:19 R1 appears two times on the original PCB...

You mean R6?

aionios wrote: ↑28 Nov 2021, 21:12 Here's the updated schematic
darkglass-duality-trace-schematic.png

I think the C16 should be connected at the other pin of the R20 (=IC6 pin3).

OK, thanks. On the traced VMT schematics it's connected to Vr, that's why I thought...

dylan159 wrote: ↑01 Oct 2021, 11:46

THE FIRST GAIN STAGE

On Mk2 schematic, I guess the C7 should be connected to Vr instead of GND.

They are Tech21 Character Series clones.
viewtopic.php?t=16105
viewtopic.php?t=6571&start=400

I basically use my rat between 8 and 8:30 o'clock - or right above zero on the the pot sweep... This is the only part of the pot range I use, so I'm wondering if there is any modification I can do to get more sweep in this range... Replace the distortion pot with a A10k pot and try. If the maximum ...

...the points show no voltage in relation to the ground. 9V is on many points in relation to the negative battery terminal however. I was just questioning why voltage tests were showing relative to negative circuits rather than ground. I do appreciate the ideas. There is a 470ohm resistor and a dio...

I'm not looking to mod it to PSA specs, I'm looking to diagnose why the pedal isn't working. The page I linked says: "some of the older Boss pedals (those with an ”ACA” sticker by the adapter jack) won’t work right with a normal 9vDC power supply. Keeping them on a daisy chain supply, with pow...

http://stinkfoot.se/archives/1019

https://www.audioservicemanuals.com/b/b ... -schematic