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Messages - JackSkellington

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Build Reports / Re: Onboard Acoustic Preamp
« on: April 23, 2019, 12:34:30 AM »
Nice job!
How did you fix the box inside the guitar?

I had to affix the enclose the same way I did the battery box: velcro.

Velcro! It was the only method I thought. Thanks! :)

Build Reports / Re: Onboard Acoustic Preamp
« on: April 21, 2019, 09:21:24 AM »
Nice job!
How did you fix the box inside the guitar?

Build Reports / Re: Aion Horizon | Catalinbread Dirty Little Secret
« on: April 19, 2019, 08:34:19 AM »
Look great!

Build Reports / Re: KTO
« on: April 08, 2019, 09:01:14 AM »
I recently had the possibility to try again the couple TS808 + Rat, my DIY pedals, and... wow!

Can you tell us more abou the controls, please? :D

General Questions / Re: Small Good Distortion in 1590A box
« on: March 25, 2019, 10:44:42 AM »
Thanks pickdropper, I want just to remind you, guys, that I build just using stripboard or protoboard.
I built the Rat a couple of time and I'm going to build it again, but not using this little box.
Anyway, just for saying: I have some of layout of the Rat. Excluding the Sabrotone layouts because those have some extra features I also have some from TagBoard Guitar FX. I built one once, and I got a bad squeal/oscillation issue. I had to build again the Sabrotone version though without the extra parts. In this case it will be too much large for a 1590A box. Even other alternative ProCo Rat layouts from TagBoard Guitar FX seem have oscillation problem much often.
Then I found this: and this:
Enough narrow, but a bit long.
In case someone want to build a Rat in a 1590A box I don't think we could squeeze a rat more than that using stripboard.

General Questions / Re: Small Good Distortion in 1590A box
« on: March 25, 2019, 08:52:00 AM »
Of course its all subjective, but there are a few distortion circuits that could fit a 1590a. However if you say the red llama is too tame, that does limit the list a bit, so lets say we want the hairy side of things.

There's always the Rat. I'm not a fan, personally, but its a grandaddy of a pedal and plenty of baby board layouts floating around.

Then there are the "amp in a box" style designs. I've seen 1590a scale Plexi-box and Sunn model-T designs both out there (The Acapulco Gold you mention above is part of that family).

I've also got a DOD FX55 (2 knob) in 1590a scale that I've never gotten around to boxing. Its very much a distortion rather than an overdrive, though your opinion of it may depend on your fondness for the late 80s to early 90s period of rock....

Or you could go ridiculously simple and just make an Electra distortion, always fun making circuits with fewer than 10 parts.

I found the Red Llama in the demo in the TagBoard Guitar FX really weak, as well the Way Huge: more an overdrive than a distortion pedal. But yes, it's subjective. I know I can't find a Triple Wreck voice or similar in a few components circuit, but at least some hard rock distortion.
Actually I don't mind the style of the distortion, it's just to have fun to build it ina a smaller box and to play with a distortion pedal.

I like the Rat, but the only stock Rat I built oscillated, I built twice a sort of Multi Rat version that I loved. Anyway in both of cases will be too much bigger, I think. Honestly, I thought about the Rat, and in particular what about the Rat without the output stage? The Rat has a lot of volume and I was just wondering about this possibility. Anyway I don't know if it works well nor if there's some verified and small layout around. :D

Something "amp in a box". I guess I didn't see in my collection some small layout of them. It could be ok just if has enough distortion.

The DOD FX55 is now in my list, but I will built it just if I like it more than to the MXR Distortion +. ;)

I think I excluded the Electra Distortion.

A while back, I fit a modified Gov'nor circuit (similar to the Suhr Riot) into a 1590a; that's probably got enough gain.

I also fit a BEOD in a 1590a, but that is not recommended.  It's a really tight fit and can be a bit prone to squealing.

Gov'nor probably has enough distortion, but I guess it's definetly too much large (as well the Surh Riot). Unless you know some Guv'nor layout wihtout equalizer.
Definitely not the BE-OD. If I will built it I'll use a larger box.

I've done "a few" if you want some inspiration (there are perfboard layouts for many of these):

Cool! I'll take a look better later.
Tell me clearly in case you recommend some pure distortion circuit and not overdrive or fuzz. ;)

Meanwhile, I found the Krank Maximus Distortion, more precisely, a sort of a modified and improved clone pedal: Protone Body Rot II. It's based on a LM386, and I know I told I don't want it, but with the Acapulco Gold I was already making an exception, at this point I say to include even LM386 circuit, then I will valuate case by case. Indeed, the Body Rot II sounds really good, it's small (but not  really really small) and has a lot of distortion. It's in my list in... a 1590B box, because it has an eq, too much knobs. Well, probably a too much large board for my 1590A box.
I can try to leave out the eq section. In the verboard layout by TagBoard Guitar FX I can't save space though this, but maybe I can reduce the protoboard layout here:
And maybe I can do it better using this one:
I can just include an extra cap which is missing in the Krank Maximus.
To set the right output tone I can use the last schematic I found here: even if I can't say it's verified. I think it should be ok.

I just to try draw it by myself.

Else, in this moment this is my list:
1. MXR Distortion +
2. DOD FX55
3. Acapulco Gold

General Questions / Re: Small Good Distortion in 1590A box
« on: March 25, 2019, 02:44:46 AM »
It should be this:
Someone call it Red Llama Overdrive. I think it don't have enough gain for my taste, after I watched some videos.

General Questions / Small Good Distortion in 1590A box
« on: March 24, 2019, 10:53:40 AM »
Hello, I ordered some 1590A type box. I used them a pair of time to build AB Box, and now I'm seraching some little project for these little box.

I alredy have in list an IC Buffer, then probably a SHO.

Now, I have to to find a small good real distortion. No fuzz circuit (One Knob Fuzz, Bazz Fuss, D*A*M Meathead...). I like them but some I built and some I'll try later, maybe.
Just no PCB, I used to build with stripboard or in case with protoboard. Max two pots because I don't want to fill too much the box, but also at least two pots to have gain and volume control.

In my list there are the MXR Distortion +, Blue Clipper and Acapulco Gold.

- MXR Distortion +
I build the DOD250, enough distortion though the pot I used is a 500k (1M gives more gain). I don't like too much the DOD250 I built, because my version is too harsh (it was my second pedal). So I could base the new schematic on the Distortion + and tweak it a bit to have more bass and a in case less harshness.

- Blue Cliepper
I don't know it, but it seems have enough distortion, I just afraid it sounds too fuzzy.

- Acapulco Gold
I didn't want LM386 based distortion pedal, indeed this has two! ;D But it sounds good. Maybe a bit peculiar distortion, I hope that the layout I can found it's not too much large.

Any circuit I'll choose I can do some mods to adjust and improve the tone and to add gain if I can or I need.
I don't think there are many distortion circuits I could use, because I build just using stripboard or protoboard, but this is it, I can live with it. I don't want to buy PCB, too. It's ok If I work with tha board I told.

Suggestion? :P


Build Reports / Re: 4-Knob Fuzz Face
« on: March 19, 2019, 02:15:16 AM »
I'm figuring the schematic, nothing new, I supposed.
The transistors should be the modern germanium, right?
A classic Fuzz Face with a charge pump; a Body control, maybe the Mid control like in the Fulltone 70? Voltage is the Bias, I guess.
I'd like to build something like that, but I didn't think about the charge pump, is it worth?
I wont't find proper hfe of AC128, probably. What about AC126, or AC125 (of this I'd have a larger range of hfe)?

The charge pump is there as an inverter. The Fuzz Face was from an era where transistor technology meant it was easier to design with a Positive Ground in mind. Makes using one with a modern power supply a pain in the ass, so adding little extra circuitry to get around the headache is worth the "mojo" cost.

Ok! ;) So it can works at 9v with a standard PSU, but it has positive ground, if I understand. Cool!

And the voltage control is a voltage reduction not a bias control.  It allows you to run the circuit at a lower voltgae, as if the battery is sagging.

Yes, it was that I meant, I just told wrongly! ;D Bias and Voltage controls are two different kind of mod.

Thanks! ;)

Build Reports / Re: 4-Knob Fuzz Face
« on: March 18, 2019, 02:13:11 AM »
I'm figuring the schematic, nothing new, I supposed.
The transistors should be the modern germanium, right?
A classic Fuzz Face with a charge pump; a Body control, maybe the Mid control like in the Fulltone 70? Voltage is the Bias, I guess.
I'd like to build something like that, but I didn't think about the charge pump, is it worth?
I wont't find proper hfe of AC128, probably. What about AC126, or AC125 (of this I'd have a larger range of hfe)?

General Questions / Re: Tutorials on how to troubleshoot?
« on: March 14, 2019, 04:38:54 AM »
I don't know if we can write a tutorial, but probably you can find some tips. And even some tips about the building, check everything double or triple.
Measure your resistors before and after to solder, read the code on the caps, use the test of the continuity for wires, check the positions of the parts, etc...

To probe the cirucuit you should follow the signal looking at the schematic, and of course, it depends from the schematic.

General Questions / Re: Glam Chorus with Vibe Mod?
« on: March 11, 2019, 03:35:31 PM »
Thank you very much! I couldn't get it.
A switch after R3 should be ok, I guess. Like in Little Angel.


General Questions / Glam Chorus with Vibe Mod?
« on: March 11, 2019, 03:32:51 AM »
Hello everybody!
I built some years ago my first chorus, the Little Angel, but I dismatled because it had background noise when I hit the strings. I tried three PT2399 (from Tayda), I tried some solution, but nothing.
Now, I'm seeing the Glam Chorus, and I want to try this and to see if I like it more, and because I want to try PT2399 from another shop and this time I don't care about eventualy noise, in fact I could like it. I want to get a sound that feel old like a ruined tape or something. If the new PT2399 sounds clean I still have the old ones! :D
The thing I like in the Little Angel was the Vibe mode, I guess I liked it more than the Vibe mode of the Zombie Chorus and the CE-2 clone (yes, after I realized more complex chorus).
I'm looking the two schematics, but I think them are too much different, maybe.

General Questions / Re: Engineer's Thumb: Is this issue normal?
« on: March 07, 2019, 02:17:18 AM »
Hello, I have a problem with the Engineer's Thumb using Sabrotone layout.
All the informations about it, here:

The effect seems work, a sort of, indeed I get the compression, but with some weird issues.
When I don't hit the strings I can hear the hiss and the volume rise up, and when I hit the strings I get a loud attack, then the compression act and I can play normally, though I got another strange thing: depends by the settings, but if I hit the strings harder the compression low the volume more than when I play softly.
I think this depends from the volume that rise up too much, it cause the loud attack and the loud volume when I play softly.
This issue cause a third problem. When I wired it into the box with footswitch and all the rest, this loud attack cause a high pitch snap when I switch off the effect, especially after I waited 6-7 seconds the release time.

That was my first stripboard, where I followed the instructions on the Sabrotone page to set fixed resistors for Threshold and Release, both at max.
Here's my update image with instructions included:

I included even the two leds (you can see in the original schematic in Valve Wizard page) in my first board. I didn't notice changing, but maybe it was because the Threshold and Release settings.

I can get a better usability, though a have little distortion in the peak in the attack with humbucker, and just at high setting of the Ratio. This time I don't have leds. I hope that will help.

To adjust the setting, after some test, I could set the Release resistor around 330k, but for the Threshold I have to understand the right replacement of that resistor. Just change the value of 1M or get the dual action of a trimpot.

Here's the original schematic, 2016:

Sabrotone version is based in the 2012 schematic version, just some little difference.
- C8: from 100nF to 1uF. Less noise?
- Release resistor was 1M but now not over 470k and not under 100k.
- 33R in line from the 9v (I think to reduce noise).
- 1k resistor (R11) left out and replaced with a jumper between pin 4 of LM137000 adn pin 6 of IC2 TL072 (look Sabrotone Layout). I don't know why.

It's been even used some parts of the LM137000 early not used.
And I just noticed that there's a newer version of the schematic, with some adding and modified parts.
I just would that my version work fine and not so weird.

General Questions / Re: Engineer's Thumb: Is this issue normal?
« on: March 06, 2019, 03:19:16 AM »
Sorry for the third post, but I'm really disturbed about this circuit! :-\

Looking some version of layout, schematic, document, etc... I found a different suggestion to replace the 1M threshold resistor.
Sometime it is just a variation of that value, so we need the lug 1 and the lug 2 and 3 connected together to change that value. Sometimes, how the Sabrotone layout does, the lug 2 of the pot goes to the positive of U1b, the lug 3 to the 4.5V the lug 1 to the positive of the U1a.

Having the Threshold and the Release pots should give us more setting, but the setting of this two pots are very tricky and get the way to play with this compressore is really dinamycally unnatural. I have to play softly to get loud and I have to play hard to get less volume!

It shouldn't be my mistake, because this is my second Engineer's Thumb and the issue is the same.
I could set the Release with a resistor, and for the Threshold a resistor or a trimpot (flying, probably). It depends from the right wiring of it.

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