This beloved amp is getting old or tired of my playing.
Plugging in into High Input and turning preamp pot from 8 to 10 behaves weirdly

loud squeal if cable is plugged in without an instrument;
with single coils middle pickup squeals and with bridge or neck pickup it has harsh sound when distorting;
with single coils turning down the tones remove the squeal;
With humbuckers there is no squeal at all;

Power tubes have been already replaced with matched EL34, bias 8uf caps replaced....

hey guys
i just built one, i tried a lot of transistors and finally got some nice sound out of it. bias voltages are ok, no ugly noises on the decay
its gated in a nice way, with a hint of octave up when i back the guitar vol pot a little....
what bothers me is on a certain combination on the guitar volume pot and the fuzz''/ bias pot in produces a kind of octave down sound which is actually very pleasant
my question is whether this is normal. i havent heard of a zonk pedal doing this

i...

So I have a DL-4 that powers on maybe 1 out of 10 times. When it does power on, it works totally fine and indefinitely. Sometimes if I unplug it after working then plug it back in, it works. Most of the time it doesn't. After that, it seems like 2 consecutive times powering up is the limit. I've reseated the Eprom several times and thoroughly cleaned the pins. I reflowed all of the pins of the socket. I reflowed a few ICs around the Eprom to see if something was just making a bad contact. I've...

Hi,

I've been trying to figure out how Way Huge did the Series/Parallel toggle switch in the Camel Toe, either in the original or reissue. Has anyone traced that part of the circuit?

Thanks!

Hello all.

I'd really appreciate some help with my build please, if possible. I have followed the troubleshooting steps in the FAQs but nothing seems to have had any effect. This is my first build with a PCB rather than a veroboard which I though would be more straightforward. That was certainly the kiss of death!

The kit is the Supreme Compressor from Effect Pedal Kits. It is based on the Valvewizard Engineer's Thumb, with 4 control knobs.

A lot of fuzz-like distortion is being produced...

I have built an old favorite from this board, the Highway 89 from Doug Hammond. This pedal kills. The tone is rocking and ballsy and the clean up is great!!

I was trying to let the other guitar player in my band use it and I discovered a really strange issue that we have tracked down to a power issue generally but do not know specifically what the problem is.

When it is powered from my old dinosaur SKB pedalboard the pedal works fine, as it does when I use a single Boss PSA 120 style...

IMG_20220518_204027.png IMG_20220518_204114.png

Here is my latest original build. The enclosure came from a 3-knob AliExpress zendrive clone kit by Landtone. I first used it for a DIY Friedman Golden Pearl, which is why there are two extra switches. It turned out that keeping these let me design a bit more flexibility in.

MOStache schem.PNG

It's a fairly straight forward amp-in-a-box type of deal, but here I'm using P-Mosfets (hence the name) instead of Jfets because they are much more...

Hi all, I am building a dual overdrive. I would like to include effects order toggle switch to change which effect is first. I am clear on how to do this using a 3PDT toggle.

I would also like to be able to insert an external pedal in between the two circuits. I am not clear on how to do this and still retain the order switch. I could do it manually with two independent circuits, individual input and output jacks, using a switching jack and patch cables to insert an external effect AND/OR...

Did a search and can't see anything specific for this

Here are some Pics
IMG_0195.jpg

IMG_0197.jpg

IMG_0201.jpg

Discofreq please feel free to use these on the effects database

Hey folks!

Andy and I have been working on the Guyatone Fuzz Monster. I did a thread on some of the Guyatone FLIP series pedals a few weeks back at diysb, and one by one, we'll dissect them, and post the traces as we go. I have a Fuzz Monster, and Hell Monster on hand, and a Funky Box on the way from Japan. I'll be cracking them open as we go down this FLIP'd journey (pardon the pun :mrgreen: ).

For now, here is the schematic, courtesy of UKToecutter (Andy);

Please note that the power...

Got it from someone that said they used the wrong power supply. What is the label on D6? Is it 5A9D?

6E75F7BF-6761-4771-AB0E-DF85838F9AC6.jpeg

I have extra boards from some pcbway orders that I've decided to offer up stateside.
●●●this is for USA shipping only●●●

They are all verified.

There's multiples of each pictured.

$5 shipping included will get you whatever boards you want, up to one of each design.

To be clear for $5 you can get all 5 boards shipping included.

●●●this is for USA shipping only●●●

I'm open to trades for boards that you have extras of.

Pm me if interested.

20220520_144152.jpg
MXR Blue Box

Mesa...

New member here, and my apologies if i am starting off on the wrong foot with my first post..,.i am hoping someone can provide some advice here as to what may be wrong with an old distortion box. I have an old univox superfuzz stomp box that when plugged in no longer generates a really cool crunch sound it now generates what really sounds like static. . It has two settings but both sound similar, like a static generator. Any ideas? maybe the capacitors need replacing. Afterall it has to be at...

Hello

This is a nice and rare rack mount tube preamp from the early 90's from Jackson. I have traced the power supply and created a schematic. Its just a simple linear supply.
I was thinking about reverse engineering the whole thing. Leave a comment if you want me to trace the entire thing. If I get enough interest Ill do it.

I posted a YouTube video about it on my channel:

JacksonJX3_PowerSupply.jpg

Peace out.
Pete

Hello All,

I know there is a lengthy thread on these Sans Amp clones, but I was wondering if I could bounce an Idea off you gurus on Pedal tweaking...

I have a Setup running a British Sound into the Joyo D-seed Delay (Mono Version). I am not running an amp and recording direct into my DAW.

I have discovered that the D-Seed is not happy with the drive level out of the JF-16 and is randomly distorting... which is quite annoying...

I have been messaging with a Joyo rep, who confirmed with the...

Hello,

This is my first pedal build and seemed to have hit a snag and not sure how to follow through or what to change from what I have. I'm following an old PDF from GEO Fex
I'm trying to do this Terminal Strip method and have gotten as far as the tuning process, inserting 100k and 10k pot to get a proper voltage reading from the collector and ground to set the transistor gain properly.

The PDF states a -6.8 to -7.2 voltage from the collector and ground is what is usually desired to get...