Search found 161 matches

by Pruttelherrie
30 Nov 2023, 20:43
Forum: PCB Guitar Mania - pedal builders group and debug
Topic: Solid Metal Pro/Solid Rock Pro build report
Replies: 10
Views: 2008

Re: Solid Metal Pro/Solid Rock Pro build report

Agree with all you typed! I've compared both schematics back to front and indeed, you need the boost input stage activated to get to the exact same stages (even though the first stages of both pedals are somewhat different) and all further stages are identical up to that SMP IC3A stage. Well, *almos...
by Pruttelherrie
29 Nov 2023, 16:43
Forum: PCB Guitar Mania - pedal builders group and debug
Topic: Solid Metal Pro/Solid Rock Pro build report
Replies: 10
Views: 2008

Re: Solid Metal Pro/Solid Rock Pro build report

micmac wrote: 28 Nov 2023, 20:30 Looks great
Hahaha no it looks like shit, but I wanted to get it working/packaged and I want to know which knob I twiddle so the labelling kind of works in that regard.

Stuff I build often looks like that but sometimes I manage to put a bit more effort into it:
by Pruttelherrie
28 Nov 2023, 16:43
Forum: PCB Guitar Mania - pedal builders group and debug
Topic: Solid Metal Pro/Solid Rock Pro build report
Replies: 10
Views: 2008

Re: Solid Metal Pro/Solid Rock Pro build report

Ok, thanks for the confirmation of the gain issue. I'll look into that mid switch, seems like I experience something similar. Here's also some pics of the 1590D. I had to grind away the middle bolt-thingy on the bottom plate to make it close properly! The drillholes are properly crooked and I put th...
by Pruttelherrie
26 Nov 2023, 17:45
Forum: PCB Guitar Mania - pedal builders group and debug
Topic: Solid Metal Pro/Solid Rock Pro build report
Replies: 10
Views: 2008

Re: Solid Metal Pro/Solid Rock Pro build report

Hey Seb, thank you so much for saving my day! I soldered mine last week but it didn't work right. I noticed that all biases were off (1.6V at most) but didn't realize that all those biasing resistors were replaced by 6k8's in the BoM. Your table saved me a lot of time. Now it works like it should (I...
by Pruttelherrie
13 May 2020, 11:05
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Boss - HM-2 Heavy Metal [schematic]
Replies: 312
Views: 237027

Re: Boss - HM-2 Heavy Metal [schematic]

That's not the HM-3 schematic.

This is.
by Pruttelherrie
04 Feb 2020, 18:09
Forum: Pimp-My-Cheap-Pedal
Topic: TC Electronics Eyemaster (HM2 clone) mods
Replies: 3
Views: 3971

TC Electronics Eyemaster (HM2 clone) mods

Hey all, Generally I'm impressed with the cheap TC Electronics line of basic pedals: they cover the basics, are extremely affordable and are built like a tank. With the Eyemaster HM-2 clone however, they decided (in all their wisdom) to only make the Gain and Level pots available, which makes it les...
by Pruttelherrie
07 Jan 2020, 17:49
Forum: Pedal Debugging & Troubleshooting Support
Topic: Boss HM-2 Issue
Replies: 1
Views: 705

Re: Boss HM-2 Issue

Q3 is the output buffer.

Do you have a signal at the wiper of the volume pot?
by Pruttelherrie
05 Jan 2020, 11:39
Forum: Boutique Stompboxes dissected...
Topic: Amptweaker - BigRock/TightMetal Pro [traced]
Replies: 63
Views: 51239

Re: Amptweaker - BigRock/TightMetal Pro [traced]

Here you go. Thanks to bajaman for letting me attach his (simplified) schematic. https://www.freestompboxes.org/viewtopic.php?f=7&t=28216&p=275399#p266213 Please revise and re-upload some form of corrected layout if you have it handy... 12V should be fed to pin 8? Hi, Actually, I redesigned...
by Pruttelherrie
10 Oct 2018, 15:27
Forum: DIY Projects
Topic: Mighty Nut - JFet simulation of a Powerball lead channel
Replies: 14
Views: 4837

Re: Mighty Nut - JFet simulation of a Powerball lead channel

... and the .brd which fell off the post since I can't seem to attach .brd files?!?
by Pruttelherrie
10 Oct 2018, 15:24
Forum: DIY Projects
Topic: Mighty Nut - JFet simulation of a Powerball lead channel
Replies: 14
Views: 4837

Re: Mighty Nut - JFet simulation of a Powerball lead channel

board_bestukking.png
Got a few requests for the 404'd eagle files, here they are!
by Pruttelherrie
04 Jun 2016, 19:13
Forum: Boutique Stompboxes dissected...
Topic: Catalinbread - Pareidolia Harmonic Mesmerizer [traced]
Replies: 113
Views: 69717

Re: Catalinbread Pareidolia Harmonic Mesmerizer [traced]

it does pass a signal but it's very trebly (I already switched out c10 to pre-compensate but to no avail) Remove R12 and see if any bass-signal passes! From there, continue to debug. and I can hear odd glitches. Hm that's weird. I suppose you don't have access to a scope and a tonegenerator? The ra...
by Pruttelherrie
04 Jun 2016, 19:01
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Lehle Parallel, schhematic [schematic]
Replies: 5
Views: 8220

Re: Lehle Parallel, schhematic [schematic]

Weird, you get a liiiitle bit more headroom this way on the negative side, but I'm not sure if it is really needed. All opamp stages are regerenced to GND and powered by +9 (or +Vbatt!!!) and -8.42, from the ICL7660. To be honest, I didn't know that the ICL deliveres a negative voltage that is sligh...
by Pruttelherrie
19 May 2016, 17:11
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Moody Sounds Pratabas
Replies: 18
Views: 10073

Re: Moody Sounds Pratabas

Forgot to remove something, could an admin/mod delete the post above? Here's the verified vero layout. (The labels are NOT the same as in the schematic above!) I built one over the weekend according to the above v1.3. Works like a charm. Photo-2016-05-19-18-36-02_5666.JPG Photo-2016-05-19-18-36-11_...
by Pruttelherrie
02 May 2016, 19:39
Forum: Software Room
Topic: Eagle lib for AD75019 crosspoint switch
Replies: 0
Views: 5331

Eagle lib for AD75019 crosspoint switch

Check the other forum for a thread about what you can do with it!

Right now I have a general purpose loop switching board in the pipeline based on this chip.

http://www.analog.com/media/en/technica ... D75019.pdf
ad75019.lbr.zip
(4.81 KiB) Downloaded 139 times
Screen Shot 2016-05-02 at 21.55.57.png
by Pruttelherrie
18 Feb 2016, 17:33
Forum: Amplifiers
Topic: 19" tube amps, patch panels and shielding.
Replies: 4
Views: 4491

Re: 19" tube amps, patch panels and shielding.

You could always bend a bit of sheetmetal around the back of that panel should it turn out to pose problems in your case, but I don't expect that to be necessary.
by Pruttelherrie
13 Feb 2016, 16:38
Forum: Amplifiers
Topic: 19" tube amps, patch panels and shielding.
Replies: 4
Views: 4491

Re: 19" tube amps, patch panels and shielding.

I think you worry too much :wink:

I assume 'glowing tubes' refers to audio tubes of your amps? In that case there's only worrying about 6.3V AC filament supply wires, which are most of the time twisted and *inside* the cases anyway!

Just my €0.02
by Pruttelherrie
11 Feb 2016, 22:39
Forum: Pedal Debugging & Troubleshooting Support
Topic: Boss DF-2 Distortion/feedbacker switching problem
Replies: 7
Views: 1696

Re: Boss DF-2 Distortion/feedbacker switching problem

It shouldn't start in "LED blinking mode", it should only blink if the footswitch is pressed. Are you sure the switch is ok? Desolder one wire and power the pedal: it should not be blinking. If it doesn't blink, touch the wire to the other FS wire for switching. Also, measure pins 10 and 1...
by Pruttelherrie
29 Jan 2016, 18:08
Forum: Pimp-My-Cheap-Pedal
Topic: Boss - Metal Zone MT2 mods
Replies: 131
Views: 224580

Re: Boss - Metal Zone MT2 mods

So I wonder if the gyrator could be improved instead of just disabled. Could it be that it sounds better with a lower Q? I could also add a trim pot in series to C24 to control the intensity of the gyrator. Or I could replace the gyrator by just a condenser and a resistor in series to ground to ris...
by Pruttelherrie
29 Jan 2016, 17:59
Forum: Pedal Debugging & Troubleshooting Support
Topic: Boss DF-2 Distortion/feedbacker switching problem
Replies: 7
Views: 1696

Re: Boss DF-2 Distortion/feedbacker switching problem

Anyways, the "SW LOGIC"-part isn't quite as obvious to me as I hoped. I understand the Ibanez JFET switching, but this seems different, with the chip in place and all. That's because of the added Feedbacker functionality, which kickes in if you hold the footswitch depressed. This requires...
by Pruttelherrie
22 Jan 2016, 18:17
Forum: Pimp-My-Cheap-Pedal
Topic: Boss - Metal Zone MT2 mods
Replies: 131
Views: 224580

Re: Boss - Metal Zone MT2 mods

The buzziness is also emphasised by the gyrator *after* the clippers. Hi frequencies are boosted far too much. Remove C 24 and hear the difference!

That said, I like your switches :D