Inevitably, I ended up redrawing the whole thing to help me gain a better understanding of its workings. I'm leaving the drawing here in case it helps someone. Note that this is as-built by SR&D. For the sake of 'science", I didn't delete anything from the original (not even the active bypa...

....Anyway hats off to your design. Managing to shrink the foot print down so much and making the whole circuit quieter is NOT easy. I have been struggling with this myself. congrats! and respect! Thank you. A year later, I'm still traumatised by how hard it was to design that 4-layer PCB -- to the...

Thanks!
I fail to understand how the output volume pot works the way it's drawn. It would have very little influence on the output volume at any setting. Are you sure the outpot jack doesn't come off the bottom of the volume pot? (pin 1). Then it would make sense.

I finaly took the time to trace a couple of X100s to figure out why some things in the original Rev10 schematic left me scratching my head. Many "as-built" component values differ from the schematic (C103A and R114 are the most consequential), but the biggest bobo was that there's no actua...

i've heard that the PT2399 can be a bit picky. Do you find that you have to change some values of components in your delay section depending on the exact PT2399 chip you use? I made 5 SMDelays using chips bought on eBay (the SMD version) and they all worked about the same without tweaking values, a...

I just discovered the TLC07x op amp family. Available in PDIP8, and significantly better than the old TL07x (much less noise, much higher output drive capability -- but pricier). If you want to build a Shockman with through hole parts and you don't care much about power consumption, it's worth trying.

Here's a mug-and-gutshot of my 2nd Shockman guitar. Hello world! This took an inordinate amount of time and effort (and money), but it was worth it. Maybe one day I'll integrate the main board and the little delay board, but I'm so happy with it as-is that I can't find the motivation to clean it up....

Anyway, how can you increase the volume of this circuit?

Increase R41 and R61

Mr Jtex, how you did undervolt that baby? Beautiful! Well, you just feed it 3V instead of 5. It will reduce your headroom along with the power draw, but it's fine with Shockman, because it has a rather heavy-handed compressor, so it will never drive the delay chip too hard, once you set the interna...

Hey man, made a PCB based on the schematic and it does sound fantastic But I got just one tiny issue How can I get more volume out of this? I should note that I used an LM741 for the first opamp instead of a TL061 and NE5532s instead of TL072 for the headphone amp stage Sorry, belated reply. 741? I...

This is the current version I have in my guitar beside the Shockman, as of now. Draws 3mA from 9V. Still subject to minor tweaks, until I lose interest :) BTW, that MAX17550 chip is tiny . I could barely solder it under a microscope. Worth the hassle, though -- it's very efficient with light loads, ...

VivMeLol wrote: ↑04 Mar 2022, 18:32

Looking great!

I just finished my own version of a delay section for my Shockman. It has nothing in common with the X100 ECHO, and it only draws 3mA from 9V. I'm very cheap with my power budget

In case anyone's interested, I finally came up with a suitable delay section to go with my Shockman. There was no way I was going to just duplicate the complicated and underwhelming-sounding original ECHO circuit. My delay uses a PT2399 chip. Its best feature is that draws only 3mA from 9v, which mi...

I keep making small changes to the design. I won't list them all here, as it's too much maintenance. The latest revision can be found on my blog:
http://jtex.ca/2021/05/06/shockman/

I use this in all my active instruments, and also in some outboard 9V battery powered boxes. The Indicator flashes green about once per second to remind you that your electronics are powered on. When the battery drops below 7 volts, the light turns solid red. The Indicator draws a very tiny amount o...

I'm posting this here for the benefit of the community. It's my own idea of what a Rockman headphone amp should be like, made with modern, easily available components. It is intentionally not an exact clone of any specific Rockman model, because my aim right from the beginning was to make it better....

You may have noticed that 2N4339 is really pricey these days, US$12. Its surface mount cousin SMP4339 is much more reasonable though, at only a couple of $. Just saying.

Carvindc125 wrote: ↑08 Jun 2021, 14:03
As you can see in this pic.
There are differences in Dunlop Guitar ACE and SR&D Guitar Ace.
Dunlop is on the left.

Did you take the picture? If so, could you elucidate the R38/R36 mystery once and for all? Thanks.