Search found 39 matches

by 1oldsidewinder
06 Feb 2018, 17:11
Forum: Boutique Stompboxes dissected...
Topic: Vertex - Steel String Singer [traced]
Replies: 25
Views: 29363

Re: New Vertex Stuff. Anyone open any of them up? [traced]

Interesting. i wonder if the new Ultra Phonix OD is a variation of the same basic design. It's also being marketed as a Dumble sim.
by 1oldsidewinder
31 Dec 2016, 20:50
Forum: Boutique Stompboxes dissected...
Topic: J Rockett - The Dude (gut Shots)
Replies: 15
Views: 8578

Re: J Rockett - The Dude (gut Shots)

Not all the op-amp stages may be in use. IIRC, the Blue Note only used half of a 4558. Another possibility might be a charge pump. Also the Dude's "ratio" control is supposed to be a clean blend. I guess a dual gang pot might be a clue. Just a guess but Rockett has had a lot of success wit...
by 1oldsidewinder
31 Jul 2015, 05:39
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumboid clone fail [traced]

My first post here. I stumbled on the Dumbloid/Big Bloom phenom late last year. The samples I saw on youtube sounded pretty okay. I built mine on a tonepad ts-808 board since I've built quite a few TS varients and have several unused boards. I used the tonepad schematic that had the new Dumbloid va...
by 1oldsidewinder
03 Jul 2014, 15:44
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

It's pretty clear that the second stage LED isn't doing much at the minimum accent setting of 1k (stock TS value). Why not put the first stage LED's on a switch so you could get both the "stock" Dumbloid sounds as well as the smoother CJOD tones from your pedal. You could even do a 3-way l...
by 1oldsidewinder
28 Jun 2014, 17:17
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

This is kind of interesting. I did a little shoot-out last night between a Dumbloid-mod SD-1 and a GGG Red Llama clone and was able to get very similar tones, using the guitar's tone control to trim the highs a bit on the RL. The D-mod Sd-1 was a little more sensitive to pick attack but the RL had a...
by 1oldsidewinder
23 Jun 2014, 14:24
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

By the way I left the single LED in the second stage. It only conducts when you turn the tone pot way up. Ripdivot, would it be too much trouble for you to also do a clip with the LED lifted? Aside from leaving the 3mm LED in place, you've pretty much reduced the Dumbloid to a YATS with what are no...
by 1oldsidewinder
23 Jun 2014, 03:24
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

By the way I left the single LED in the second stage. It only conducts when you turn the tone pot way up. Ripdivot, would it be too much trouble for you to also do a clip with the LED lifted? Aside from leaving the 3mm LED in place, you've pretty much reduced the Dumbloid to a YATS with what are no...
by 1oldsidewinder
22 Jun 2014, 23:59
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

What I really find curious are the posts where guys have tried every possible combination of clipping diodes and it apparently hasn't helped. It seems like converting the pedal to diode clipping would solve the problem if the rattle was indeed a product of op-amp distortion. If someone was to repla...
by 1oldsidewinder
21 Jun 2014, 15:27
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

What I really find curious are the posts where guys have tried every possible combination of clipping diodes and it apparently hasn't helped. It seems like converting the pedal to diode clipping would solve the problem if the rattle was indeed a product of op-amp distortion. If someone was to replac...
by 1oldsidewinder
17 Jun 2014, 14:13
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

Enough talking about the farty decay, I thought it was time to record it. The following clip consists of 3 parts. The first section is played through my dumbloid clone on the breadboard with a strat through a deluxe reverb reissue dry with no effects or processing. The second part is played through...
by 1oldsidewinder
15 Jun 2014, 16:17
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

Correct me if I'm wrong but wouldn't lowering the value of those resistors give Q1 and Q2 a much hotter bias? Do you suppose the designer is using them as boosts or to contribute to the distortion in some way? I've read in a couple of earlier posts that these changes seemed "arbitrary" but...
by 1oldsidewinder
15 Jun 2014, 05:13
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

I don't understand the purpose behind the lower values of the biasing resistors for Q1 and Q2 (150k and 100k) on the D'loid and BB. Has anyone tried the Tube Screamer value of 510k for these? It seems possible some weirdness might be occurring there.
by 1oldsidewinder
10 Jun 2014, 04:43
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

Ripdivot wrote:The dumbloid does have a nice voicing though.
400hz HP filter and an Eternity-like 7k tone control. It would be easy to take the things you like about the D'loid and add them to the Tube Screamer of your choice.
by 1oldsidewinder
08 Jun 2014, 15:55
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 69
Views: 56126

Re: Mad Professor Simble [traced]

That shot of the corner of the board with the transistor and diodes is interesting. Looks like a series resistor combined with a diode (D1) and the transistor. The other diode looks to be labeled D8 and may serve a different purpose. So what are we looking at; a buffer w/ protection diode or maybe h...
by 1oldsidewinder
07 Jun 2014, 06:34
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

I think I'm hearing something a little different. The 3mm LED seems to decay faster than the op-amp clipping, making a transition from fairly severe asymmetric clipping to the op-amp's more symmetric sound as the note fades away. If you look at the accent control, you can see how it's being put to c...
by 1oldsidewinder
28 May 2014, 06:02
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

A small cap across the 3mm LED seems to help smooth the decay a bit.
by 1oldsidewinder
24 Apr 2014, 02:56
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

I tried blue and red leds in both the first and second stages in all sorts of configurations and they helped a bit but the fizzy decay was never totally gone. I don't get it because other pedals with leds in the feedback loop don't seem to have this problem. I need to isolate what stage is causing ...
by 1oldsidewinder
20 Apr 2014, 17:38
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 478
Views: 180536

Re: Dumbloid [traced]

You might also try lifting a leg on the 3mm LED just to determine where the fizz is coming from. It's still part of the circuit even at the minimum "accent" setting. The accent control should still function as a second gain control without it.
by 1oldsidewinder
19 Apr 2014, 20:48
Forum: Pimp-My-Cheap-Pedal
Topic: "Dumbloid" mod for the Boss SD-1
Replies: 2
Views: 4246

Re: "Dumbloid" mod for the Boss SD-1

Manfred wrote:Which schematic version are you referring to for applying the mod?
The part identifiers for clipping diodes at the original schematic are D4, D5, D6.
May you add the matching schematic.
Doh! You're absolutely right. It should have read "remove D4, D5 and D6". Forgive my error.
by 1oldsidewinder
19 Apr 2014, 17:18
Forum: Pimp-My-Cheap-Pedal
Topic: "Dumbloid" mod for the Boss SD-1
Replies: 2
Views: 4246

"Dumbloid" mod for the Boss SD-1

This mod is in no way intended to be a clone but will give up some of the OD tones associated with the Dumbloid and Big Bloom pedals. I've stripped it down to as few changes as possible, using only common, Radio Shack parts. Here are the changes: Remove D1, D2, and D3. Do not jumper C2- .1uf film C3...