Search found 374 matches

by mmolteratx
03 Apr 2014, 01:08
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Well, update on PCB status. They came in today, but I accidentally ordered a previous revision that doesn't work. :slap: Will reorder in the next few days. That stinks, man. I don't mind paying a little extra when you get the new ones to help offset the cost of the bad boards. Nah, don't worry abou...
by mmolteratx
02 Apr 2014, 21:14
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Well, update on PCB status. They came in today, but I accidentally ordered a previous revision that doesn't work. :slap: Will reorder in the next few days.
alfieboy wrote:The transistor voltages I'm getting are =
Q1
C - 9.17v
B - 5.16v
E - 4.84v

Q2
C - 9.23v
B - 5.11v
E - 4.58v
What about the op amp?
by mmolteratx
28 Mar 2014, 00:34
Forum: Boutique Stompboxes dissected...
Topic: JHS SuperBoat [traced]
Replies: 47
Views: 19049

Re: JHS SuperBoat [traced]

Manfred wrote:
mmolteratx wrote:For the lazy.
The tone potentiometer is missing at the schematic.
There is a potentiometer gain1, I suppose that is rather the tone potentiometer.
Am I right?
Is the value of 500kA suitable for the tone pot.
I forgot to change the name of the part 500kA is exactly what you want.
by mmolteratx
21 Mar 2014, 23:49
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Yes.
by mmolteratx
21 Mar 2014, 22:37
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Oops. The one you want for this is the T101 (On-None-On), not the T103 (On-Off-On) I listed. Picked the wrong bookmark. Not at a PC where I can grab the link right now, but you can search it easily enough. PC mount version is the one you want. I'll link later.
by mmolteratx
21 Mar 2014, 20:53
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

FYI, PCB is verified. Having some issues with the computer that the board design is on, so it'll probably be a few days before I can order. If you're interested, send me an e-mail at my username @gmail.com with how many you want and your PP address so I can make a spreadsheet and invoice you when th...
by mmolteratx
13 Mar 2014, 22:55
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

FYI, a bunch of people have contacted me about the PCBs. The small prototype run will be at my door next Thursday, I think, and I'll build them up over the weekend. I'll post here when I get ready to place a bigger order. Not taking any money right now.
by mmolteratx
08 Mar 2014, 01:03
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Did up a PCB since a buddy wants one. Once it's verified, I could do a small run. Price would be $5 plus shipping. Those switch holes big enough? Or is the expectation to use PCB mount SPDT? PC mount. And a specific type at that. http://www.mouser.com/ProductDetail/CK-Components/T103SHZQE/?qs=sGAEp...
by mmolteratx
07 Mar 2014, 22:55
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Did up a PCB since a buddy wants one. Once it's verified, I could do a small run. Price would be $5 plus shipping.
by mmolteratx
03 Mar 2014, 17:25
Forum: Boutique Stompboxes dissected...
Topic: Greg Fryer - Treble Booster Deluxe (Guts + Schem)
Replies: 20
Views: 4672

Re: Greg Fryer - Treble Booster Deluxe (Guts + Schem)

JDub42 wrote:Excellent post!

I'm guessing the blue resistors are metal film and the beige ones are carbon film???

I've seen that Greg Fryer uses metal film, carbon film and carbon composite resistors in his AC30 rebuilds.

Is this done for some sort of 'tone improvement' reason?
Ridiculous mojo reasons.
by mmolteratx
03 Mar 2014, 09:46
Forum: Boutique Stompboxes dissected...
Topic: JHS SuperBoat [traced]
Replies: 47
Views: 19049

Re: JHS SuperBoat [traced]

For the lazy.
by mmolteratx
03 Mar 2014, 09:26
Forum: Boutique Stompboxes dissected...
Topic: JHS SuperBoat [traced]
Replies: 47
Views: 19049

Re: JHS SuperBoat [traced]

You're thinking too much into this. All the info you need has been posted, just start with a Supreaux (not Deux). One, remove the 100k gate resistor and replace it with an input cap. Really anything over 22n is fine. Then add a 1M pulldown resistor. Q2 source resistor is 2k7 instead of 3k9. High/low...
by mmolteratx
28 Feb 2014, 20:59
Forum: Boutique Stompboxes dissected...
Topic: Dumbloid [traced]
Replies: 471
Views: 125753

Re: Dumbloid [traced]

Do people still give a crap? Even the best demo from Pete Thorn makes it sound mediocre.
by mmolteratx
10 Feb 2014, 05:59
Forum: Boutique Stompboxes dissected...
Topic: Walrus Audio - Mayflower [traced]
Replies: 45
Views: 23264

Re: Walrus Audio Mayflower [traced]

newly wrote:
mmolteratx wrote:Just realized I accidentally placed the +9V tap at the +4.5V tap. Anyone reading it should realize the error pretty quickly.
So all "+9V" should connected to "V+" instead right? VB remain as 4.5V.
Yes.
by mmolteratx
09 Feb 2014, 03:47
Forum: Amplifiers
Topic: Badcat Unleash Re-Amplifier (solid state 100w acheivable)
Replies: 1
Views: 972

Re: Badcat Unleash Re-Amplifier (solid state 100w acheivable

Simple version would be to build a reactive load and grab one of those cheap Chinese class D kits and throw them in the same chassis.
by mmolteratx
28 Jan 2014, 21:54
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Walrus Audio - Voyager Overdrive
Replies: 10
Views: 5402

Re: Walrus Audio Voyager Overdrive

Who cares? It's a Klone...
by mmolteratx
20 Jan 2014, 04:58
Forum: Boutique Stompboxes dissected...
Topic: Wampler Faux Spring Reverb
Replies: 51
Views: 12586

Re: Wampler Faux Spring Reverb

Try the datasheet mixer with the 50k pot in series with the 22n cap in the NFB. I think that's what Brian's saying. See the Deuce Coupe tone control for what I'm talking about.

EDIT: Wait, I forgot I drew this up months ago. Here's the schem.

EDIT2: Holy crap, it's been almost a year. My bad. :lol:
by mmolteratx
19 Jan 2014, 05:05
Forum: DIY Stompbox designs
Topic: Servo Offset Biasing for JFETs
Replies: 29
Views: 10968

Re: Servo Offset Biasing for JFETs

Great! Thanks for taking the time to breadboard that. Did you run audio through it? Hows it sound? Just like a normal JFET stage really. The boost stage is based on a Baby Pink Booster and it sounds pretty much identical, save for a few adjustments I had to make to use it with 5457s instead of 5952...
by mmolteratx
19 Jan 2014, 02:51
Forum: DIY Stompbox designs
Topic: Servo Offset Biasing for JFETs
Replies: 29
Views: 10968

Re: Servo Offset Biasing for JFETs

Just breadboarded this, and it works pretty damn well. Bang on 4.5V with a 2 dozen FETs I've rolled through. Could use a few improvements just to make my EE profs happy though. Will work on it some more when I've got more time. You could eliminate C6, downsize C5 to 100n (or even smaller, but physic...
by mmolteratx
19 Jan 2014, 01:51
Forum: DIY Stompbox designs
Topic: Servo Offset Biasing for JFETs
Replies: 29
Views: 10968

Re: Servo Offset Biasing for JFETs

I like it. I've thought about something similar before, but never got around to actually implementing it.