Got this pedal a while ago and did a quick trace

(pics can be found on my instagram page)

Turns out to be a EQD Acapulco Gold pedal with a dedicated output buffer
(the ferrite bead / cap filters are standard for Nexi pedals)

I replaced C1 as the polarity didn't match the datasheet of the LM386. it didn't make any difference though in the sound

EnjoY!
Nexi - Distortion.JPG

Hello,
got to open this one to see whats inside.

box_and_pcb.jpg

Edit: in the drawn PCB view the polarity of the unidentified protection diode was upside down, now it is corrected.
I replace it with a 1N4001 diode
I bought this defective Amiko NSG-2 noise gate pedal, it is identical in design to the PSK NSG-2 pedal.
Since I could not find a schematic, I drew it out by tracing the circuit board.
This pedal is a BOSS NF-1 noise gate clone.
Differences are:
External power supply through a DC adapter instead of a DC adapter.
C=47n instead of C=100n and R=470k...

Hello,
As I am an avid cloner myself, I thought that it's my time to give something to the DIY community. I got ahold of the effect mentioned in the title and I am providing some gut shots, also a list with components. Capacitor values on the list have ? due to my lack of experience with SMD components. Where there is no indication on the list will be completed tomorrow then I'll get a magnifying glass. All other info from the list are markings on the components (mostly SMD).
Here are some...

As I continue my quest of identifying cheap vintage boss clones I found this pedal.

And from what I traced it is... a boss HM-2 Heavy Metal clone. Layout is almost identical, the only difference I saw is the fact that the PSK only has one tone knob, what happens in the circuit is that the tone pot on the pedal is the HM-2's high pot and it's acting as if the low pot was maxxed out, but the cap linked to it (C35 on the HM-2 schematic) is 1µf instead of 1.5µf. A little less low then,...

Found the Schematic by tracing.
The tone control (WAVE) is unusual.
Applause Super Distortion Top View.jpg
Applause Super Distortion Layout.JPG
Applause Super Distortion wiring.jpg
Applause Super Distortion Signal.jpg
Applause Super Distortion Switching.jpg

The series connection of the two Z-diodes across IC2a has no effect, because the threshold voltage of about +/- 6.1 volts at 9 volts supply voltage can never be reached.

5V6 anti seriel.jpg

I dissected the Sound City distortion.
I made a approximate layout copy of the PCBs and traced the circuit.
The circuit of this distortion is the same as the Panther distortion except for the feedback part, the diode types and the type of operational amplifier.
I cannot figure out the JRC dating code, who can tell me the date of manufacture of the Op-amp.
SoundCityDistortionTopView.jpg
SoundCityDistortionPCB_ComponentSide.jpg
SoundCityDistortionPCB_OPamp.jpg...

I recently bougt this defective BROS Distortion pedal and traced it.
The BROS Distortion is almost the same as the Soundcity DS-04 Distortion.
There are two differences the resistor R1 has a value of 4.7 kiloohms instead of 2.7 kiloohms on the Soundcity pedal,
the DIST potentiometer (R8) has a value of A50K instead of B100K on the Soundcity pedal.
Here the link to the post of the Soundcity DS-04.

BROS Distrotion Top View.jpg
BROS Distrotion Wiring.JPG
BROS Distortion PCB Top View.JPG...

As promised in my previous post about Hiwatt Tube Overdrive, here is the second pedal from this tube series of pedals. Unfortunately, I don't have access to the remaining three (hi-gain distortion, phaser and tremolo).
IMG_2827.JPG
You can get really great sounds from this one. The controls are versatile enough to give a wide range of sounds from medium overdrive to nice big distortions.
Gutshots:
IMG_2829.JPG
IMG_2828.JPG

Again, I went and whipped up a schematic:
Schematic_Hiwatt Tube...

I bought a long time ago this BOSS-SD1 pedal with the so-called DENIZZ mod.
About this mod I could not find any information.
There are foil capacitors exchanged for WIMA types and some component values changed and also components omitted and replaced by jumpers.
Carbon film resistors in the signal path are replaced by metal film resistors.
Some diodes and BJTs other types.
D3 omitted and jumpered.
R31 omitted and jumpered.
D1 Zener 11V exchanged for a diode 1N4001.
The operation with AC via the...

Hi!

I just got one in, and as being a fan of these CMOS pedals, I needed to trace it!

For pics just take a look at my instagram; User: bernardduur

Hot Tubes Nano.JPG

Redrawn, so you don't have to feel like a criminal for looking at a damned schematic:

Does anyone has pics of the pcb for this one (blue pcb)?

I found only these pics

I'd like to check what they changed from this one that has green pcb

Thanks

Hi everybody,

I have a Dunlop TS-1 tremolo pan, stil with plastic knobs.

It's working fine except the intensity is stuck to the max.

it is NOT the pot.

Someone knows the issue ?

Anyone has schematic for this ?

Thank you so much

denis

I have a GV-2 that is perfect through bypass, but quite noisy with the effect engaged. If the gain goes from 2-5 (dimed) o'clock, it does a loud, obnoxious squeal. The squeal does vary by volume. At one point with the gain dimed, I heard the squeal faintly while in bypass. I can't seem to find a bad component as I've tested the ICs, transistor, a couple caps, and the ground line. Would a component be leaking the signal somewhere?

I'm experimenting with the EHX Small clone, but don't really understand why they put the transistor at the start of the circuit, why not just have a bit of filtering instead of the extra stuff.

Just curious.

I should add, I'm using two LM13700 OTA Ics instead of multiple CA3094s.

Hey guys,

I didn't see the newer Big Muff schematics up anywhere, so I traced mine while I had it apart. I bought it sometime in 2014, PCB reads EC-3003 REV_E. Ref Des on the schematic should match the PCB. Level pot may be wrong (Silk says 500kA) as I replaced the pots almost immediately after getting it because one of the awful, awful ones that came stock broke.

Hopefully this will help people looking to mod theirs.

Joe