Search found 292 matches

by uncleboko
12 Sep 2020, 12:43
Forum: Boutique Stompboxes dissected...
Topic: Pigtronix - Mothership
Replies: 19
Views: 5016

Re: Pigtronix - Mothership

Tomrcarre wrote: 12 Sep 2020, 09:36 Can’t wait to see a schematic of this, I bet it’ll be a nightmare to layout on vero.
Only if you let it!
by uncleboko
06 Sep 2020, 06:15
Forum: Boutique Stompboxes dissected...
Topic: Pigtronix - Mothership
Replies: 19
Views: 5016

Re: Pigtronix - Mothership

I too look forward to seeing the fundamental extractor circuit, as I do my annual treacle pudding and custard allowance under my low cholesterol diet!!!
by uncleboko
29 Jul 2020, 20:41
Forum: DIY Stompbox designs
Topic: A Phaser Unit
Replies: 3
Views: 431

Re: A Phaser Unit

[smilie=a_holycrap.gif] OMG, why? It must have taken ages to copy this info in Excel. Please make yourself a favor, and use CAD software to draw schematics. Many are free. Or even simpler, give a direct link: https://worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1979-04-S...
by uncleboko
28 Jul 2020, 11:30
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Riddle QBalls VCF
Replies: 33
Views: 8916

Re: EHX - Riddle QBalls VCF

Still DIP for LM2901 - excellent!!
by uncleboko
28 Jul 2020, 09:32
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Riddle QBalls VCF
Replies: 33
Views: 8916

Re: EHX - Riddle QBalls VCF

I've been watching a couple of Riddle demo videos, I don't hear any of the usual hideous junior micro box quackery, some serious thought went into its design. What can LM2901 do that LM339 can't?
by uncleboko
27 Jul 2020, 20:21
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Riddle QBalls VCF
Replies: 33
Views: 8916

Re: EHX - Riddle QBalls VCF

The LT3487 looks like an unusual beast!
by uncleboko
26 Jul 2020, 21:10
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Riddle QBalls VCF
Replies: 33
Views: 8916

Re: EHX - Riddle QBalls VCF

I'm guessing that the 4558s are used in the input/VCF/output path, and the TLO62s & 64, LM2901 & 4066 form the control circuitry.
by uncleboko
21 Jun 2020, 14:49
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Micro Synth XO Version [schematic]
Replies: 103
Views: 53119

Re: EHX - Micro Synth XO Version [schematic]

Would there be room for the slider pots?
by uncleboko
13 Jun 2020, 14:28
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Micro Synth XO Version [schematic]
Replies: 103
Views: 53119

Re: EHX - Micro Synth XO Version [schematic]

A reworked Space Drum circuit using LM13700 was posted a while back which might give some clues.

viewtopic.php?t=11251
by uncleboko
06 May 2020, 18:00
Forum: Amplifiers
Topic: How to improve tube amplifier tone by changing one part
Replies: 101
Views: 7949

Re: How to improve tube amplifier tone by changing one part

They will no doubt make you play faster too :lol: :lol:
by uncleboko
30 Dec 2019, 21:29
Forum: Pedal Debugging & Troubleshooting Support
Topic: EHX 4 Knob Deluxe Octave Multiplexer Schematic?
Replies: 5
Views: 517

Re: EHX 4 Knob Deluxe Octave Multiplexer Schematic?

uncleboko wrote:Did anyone ever adapt this for LM13600/13700?
Did anyone?
by uncleboko
02 Oct 2019, 10:42
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Wem Watkins - Super IC Copicat Tape Delay (1978)
Replies: 2
Views: 1438

Re: Wem Watkins - Super IC Copicat Tape Delay (1978)

Designed I think by Alan Bradford of Time Machine Electronics.
by uncleboko
31 Aug 2019, 12:09
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Riddle QBalls VCF
Replies: 33
Views: 8916

Re: EHX - Riddle QBalls VCF

uncleboko wrote:A pedal tech told me its almost entirely opamps, with a quad comparator thrown in for good measure!!!
With a plethora of resistors, caps, dual diodes and a vactrol. More than that I cannot say having lost touch with this guy.
by uncleboko
30 Aug 2019, 22:44
Forum: Modern Stompbox Effects (1975 - ...)
Topic: EHX - Riddle QBalls VCF
Replies: 33
Views: 8916

Re: EHX - Riddle QBalls VCF

A pedal tech told me its almost entirely opamps, with a quad comparator thrown in for good measure!!!
by uncleboko
24 Jan 2019, 15:42
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Klemt Echolette M100 tube amp
Replies: 18
Views: 3282

Re: Klemt Echolette M100 tube amp

I knew a guitarist in the Barnet area of North London around 1964-65 who used Echolette echo with an Echolette amp, and could play much Chet Atkins stuff - including Lullaby of Birdland!!
by uncleboko
08 Jan 2019, 21:05
Forum: Pedal Debugging & Troubleshooting Support
Topic: EHX 4 Knob Deluxe Octave Multiplexer Schematic?
Replies: 5
Views: 517

Re: EHX 4 Knob Deluxe Octave Multiplexer Schematic?

Did anyone ever adapt this for LM13600/13700?