Search found 70 matches

by bool
30 May 2019, 14:45
Forum: Boutique Stompboxes dissected...
Topic: R3FX Resistafier
Replies: 7
Views: 1770

Re: R3FX Resistafier

Yeah the innards look a lot like a '80 DIY something.
by bool
30 May 2019, 14:41
Forum: Ready-To-Build Effect Projects
Topic: BAJA LA2A Style Optical Limiter [verified]
Replies: 98
Views: 18744

Re: BAJA LA2A Style Optical Limiter [verified]

Its a "353" ... probably because that's what was used in the "inspiration" pedal. It's a a TL072-workalike.
by bool
06 Apr 2019, 13:34
Forum: Boutique Stompboxes dissected...
Topic: Analogman - King of Tone [traced]
Replies: 459
Views: 156334

Re: Analogman - King of Tone [traced]

MPSA14 should be similar to MPSA13.
by bool
24 Mar 2019, 13:25
Forum: Pedal Debugging & Troubleshooting Support
Topic: Colorsound Tremolo Troubleshooting (No Effect)
Replies: 13
Views: 192

Re: Colorsound Tremolo Troubleshooting (No Effect)

I think you would also have to increase the 0.22uf coupling cap to Q4 a little. Perhaps use a 0.47 here.
by bool
18 Mar 2019, 14:03
Forum: Boutique Stompboxes dissected...
Topic: Wampler Pantheon [traced]
Replies: 38
Views: 10075

Re: Wampler Pantheon [traced]

My un-informed gut reaction to seeing the schematic is that by changing the value of C6 you could de-woof your pedal a bit. Just a speculation, of course.
by bool
24 Feb 2019, 14:45
Forum: Boutique Stompboxes dissected...
Topic: Keeler Designs Push
Replies: 19
Views: 6363

Re: Keeler Designs Push

You could also try to change values for C1/R2 combo - to 47nF/220k for example.
by bool
22 Sep 2017, 11:58
Forum: Boutique Stompboxes dissected...
Topic: Amptweaker - Tight Metal [traced]
Replies: 634
Views: 202757

Re: Amptweaker - Tight Metal [traced]

>>>> Maybe if it made it less tight (loose) it could serve a purpose because I find the Amptweaker pedals to be a bit stiff and unforgiving especially for playing lead solos. Adding a "loose" switch to the "tight" control could be made by simply breaking the continuity to the pot with a simple on-of...
by bool
16 Sep 2017, 11:08
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

.... The original pedal appears to use whatever is cheap and easily available. No disrespect toward Mr. F, just calling it how I see it. It seems the sound is in the CIRCUIT, not MAGIC NOS IC's, germanium, etc. In some pedals, guys obsess over carbon comp vs. metal film resistors, cap type, etc. In...
by bool
21 Aug 2017, 11:53
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

Perhaps the original value isn't 120p but 1200p (1.2n)..
by bool
19 Aug 2017, 17:13
Forum: Pimp-My-Cheap-Pedal
Topic: McCrypt AT2 Distortion (Krank Maximus style clone) Schematic
Replies: 9
Views: 4029

Re: McCrypt AT2 Distortion (Krank Maximus style clone) Schem

You can testdrive how the freq. change suits the pedal by simply (temporary) changing the 10k res. in the stack to 1k (parallel something to it f.e. a 1.1k resistor)

The eq curve wont be ideal, but massaging the eq usually takes time.
by bool
14 Aug 2017, 11:56
Forum: Pimp-My-Cheap-Pedal
Topic: McCrypt AT2 Distortion (Krank Maximus style clone) Schematic
Replies: 9
Views: 4029

Re: McCrypt AT2 Distortion (Krank Maximus style clone) Schem

Theres a slight contradiction in "mid-notch filter" and "center frequency about 100Hz".

As I suggested for this style pedals imho it would be worth upping the "mid-notch" to somewhere around 330-350Hz. But hey...
by bool
10 Aug 2017, 13:05
Forum: Pimp-My-Cheap-Pedal
Topic: McCrypt AT2 Distortion (Krank Maximus style clone) Schematic
Replies: 9
Views: 4029

Re: McCrypt AT2 Distortion (Krank Maximus style clone) Schem

Man, that "tone" section just dosen't make any sense to me. From a quick calc, it seems that the scoop is centered around 110Hz (slightly bellow actually), which is rather low imho. If you replace that 100nF cap with a 22nF; and the 10K resistor with a 4K7; you should get more in the 340Hz-ish terri...
by bool
07 Aug 2017, 13:03
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

... Conclusion: Personally, 4148 seems to give me the expected sound. ... That wouldn't be surprising, because electrically they seem to be fairly close to the original SMD part. Also juction capacitance; 1pF @ BAV99 vs 2pF @ 1N4148 yields a cca 1pF vs cca 2pF total capacitance diff. for the 4 in-c...
by bool
21 Jul 2017, 12:45
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

@baja: "....I cannot comment on how these devices sound or how they actually clip in practical terms, but running several AC sweep simulations made it very clear that the FREQUENCY RESPONSE CHARACTERISTICSare very different between these devices. ..." That's precisely what I was getting at. Device-i...
by bool
20 Jul 2017, 12:59
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

@bajamon: are you absolutely totally sure you applied the "DIY-er correct" methodology in simulations? Perhaps I'm mistaking, but (to me) it seems that you are comparing TWO pn drops (i.e. 4x1N4148 scenario) versus ONE pn drop (fat transistor b-e junction). My ghetto solution (but I could be totally...
by bool
18 Jul 2017, 14:31
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

Reading on ZTX these seem to be optimised for low saturation voltage switching application, so what you're saying makes perfect sense. (I think MPSA06 are used in tube amps???) But while you are at simulation, I think you can shoehorn a close-enough characteristic (for DIYers) juggling the resistor ...
by bool
18 Jul 2017, 12:57
Forum: Modern Stompbox Effects (1975 - ...)
Topic: AMT Electronics - Slap Bass [schematic]
Replies: 12
Views: 3922

Re: AMT Slap Bass (Provisional Schematic) [schematic]

If U1A pin2-pin1 are shorted, then it's a buffer - and the only logical conclusion in this case would be that they use a similar "deep notch" as SansAmps do in some of their "other" pedals (the misterious caps and resistors hanging off the U1A).
by bool
18 Jul 2017, 12:50
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 191298

Re: Friedman BE-OD Pedal [traced]

Using transistors to clip would make perfect sense since transistors seem to be used as clippers in tube amps as well.
by bool
17 Jul 2017, 12:57
Forum: Modern Stompbox Effects (1975 - ...)
Topic: AMT Electronics - Slap Bass [schematic]
Replies: 12
Views: 3922

Re: AMT Slap Bass (Provisional Schematic) [schematic]

Imho you have the R3 placed wrong. It should go right from U1A pin1 to U1A pin2. And consequently the C13 should connect directly to U1A pin2 (now junction pin2, R3 and C13). It looks like a fixed souped-up mid-boost section. (perhaps as you mention this is intended for some "other" type of pedal). ...
by bool
16 Jul 2017, 13:06
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor 1
Replies: 40
Views: 10574

Re: Mad Professor 1

BF545A is supposed to be a SMD version of the old skool tru-hole BF245A.