What’s on *YOUR* workbench?

IMG_2289.jpeg

I didn’t really think a full build report or was required for this one. Just good rock solid utility, only function checked it but I was pleasantly surprised at the noise floor and operation, dimed the knobs and only started to clip the interface into the yellow where I had it set. Next step implementing it into my rig to see how well it works for me. So far I can already tell it’s better than a Klein bottle 🤣
 
Wired up my board for tomorrow's solo gig.
L-R, top to bottom: FC Randy's revenge (tremolo). TC El HOF, CHinese Dyna Comp knockoff, wobbly tuner,
Taqueria OD on the low gain and Taco setting, Musikding Phase 90 block version, Lectric FX karaoke Chorus for vibrato and chorus.

Signal chain is tuner > comp > chorus > phaser > OD > reverb > tremolo

518380295_2970421336451677_7959513106586863207_n.jpg

Playing my pimped parlor and the bar's upright.
Drop by if you're in Krakow. It's free, the beer is good and there's another bar around the corner if I stink

www.facebook.com

ANDREA AUSTONI — CONCERTO ITALIANO @LIBERTY | 19.07.2025 | FREE ENTRY - RSVP

Music event in Kraków, Poland by Liberty Cafe and 2 others on Saturday, July 19 2025
www.facebook.com www.facebook.com
 
JTEX said:
I've just finished the biggest trace I've ever done. MXR X100. Well, actually it's not really finished until I manage to find someone who can independetly verify it. It's a Level 100 Final Boss fight.

First thing I want to do with this is to figure out a mod to directly engage any of the 4 modes using some external switches, without having to cycle through them.
Click to expand...
Well done! For the switching, you may find this useful . . .
Pressing any one of the four switches (Sw1 - Sw4) disables the previously selected option. D5 connected to Sw1 ensures that Sw1 is the default option at power up. The default power up option is determined by D5 and whether it's connected to the N/C leg of Sw1, Sw2, Sw3 or Sw4.
You should be able to use the resulting logic from the CD4042 and diodes D11thru D14 and apply to the existing switching devices in the original.

1-of-4_Generic_Switching_Schematic_4042_02.png
 
^ Thanks, I'll take a look. But I have the feeling that there must be a really easy way to tap into the existing switcing logic. There's already a CD4052 onboard, driven by a binary counter incremented by the mode switch. I just have to turn it from a "sequential gearbox" to a full 4-speed stick shift, so as to speak.
 
JTEX said:
^ Thanks, I'll take a look. But I have the feeling that there must be a really easy way to tap into the existing switcing logic. There's already a CD4052 onboard, driven by a binary counter incremented by the mode switch. I just have to turn it from a "sequential gearbox" to a full 4-speed stick shift, so as to speak.
Click to expand...
Cybercow said:
You should be able to use the resulting logic from the CD4042 and diodes D11thru D14 and apply to the existing switching devices in the original.
Click to expand...
Precisely. You should be able to come off from diodes D11, D12, D13 & D14 for "Q1/Q2" logic, (or directly off the CD4042 for "Q1, Q2, Q3, Q4" logic), to the existing CD4052. (If that's the device controlling the 4 Modes. The schematic you posted is a bit hard to read.)
 
Last edited:
^ Here's (most of) the mode switching part, in glorious HD. I guess I just have to devise an alternate way of setting pins 9 and 10 of U11.

1752890686880.png
 
Put a trebel bezel in my beloved 4003. Been so long since I'd dug it out of its case the other day that I'd completely forgotten I'd added the thumb rest bar next to the neck pickup, too. Both of these mods have done wonders for playing comfort. Someday I'll swap pickups for something less hissy.
IMG_20250718_211552555_HDR.jpg
 
Last edited:
JTEX said:
^ Here's (most of) the mode switching part, in glorious HD. I guess I just have to devise an alternate way of setting pins 9 and 10 of U11.
Click to expand...
Cool. In the top portion of the schematic I posted, you could eliminate the CD4052 devices and you should be able to come off from diodes D11, D12, D13 & D14 for the "Q1/Q2" logic used by the existing CD4052 analog switch.

But it appears that IC11 (CD4052) is only switching the Mode LEDs. Unless . . . . What do the other outs of IC11 (JP6 Pin2; JP6 Pin4 & JP6 Pin5 - {pins 11, 12 & 14 respectively} parallel outs of the LED logic) drive? Where is the actual audio portion of the switching happening?
 
You must log in or register to reply here.
Back
Top