Blackstone Appliances - MOSFET OD (2SV3.12) [ goop-alarm ]

soulsonic · Post by **soulsonic** » 23 Mar 2009, 05:34

madbean wrote:There was another little surprise in there, which I will also share.

A Golden Ticket?

bajaman · Post by **bajaman** » 23 Mar 2009, 06:28

don't keep us in suspenders

great work brian

bajaman

borislavgajic · Post by **borislavgajic** » 23 Mar 2009, 11:28

madbean wrote:Looks like two 1/4W resistors and three 1/8W resistors to go along. I'll finish this up tomorrow. There was another little surprise in there, which I will also share.

It's a double sided board, too. I might just desolder the whole thing.

Ripdivot · Post by **Ripdivot** » 01 Apr 2009, 03:48

Any luck with the double sided board?

RnFR · Post by **RnFR** » 01 Apr 2009, 05:40

man, these suspenders are really uncomfortable.

madbean · Post by **madbean** » 01 Apr 2009, 06:08

This will whet your appetite, I think.

soulsonic · Post by **soulsonic** » 01 Apr 2009, 06:17

Awwww.... better write them now and order a module before they go back on the deal!

SPeter · Post by **SPeter** » 01 Apr 2009, 07:23

soulsonic wrote:Awwww.... better write them now and order a module before they go back on the deal!

briggs · Post by **briggs** » 01 Apr 2009, 10:51

haha, that is one of the funniest things I've seen in a while! Do you think it's for real?

RnFR · Post by **RnFR** » 01 Apr 2009, 11:17

at least they said please!

perregrintuk · Post by **perregrintuk** » 01 Apr 2009, 14:39

Hey folks,

could any of you explain me in a short and understandable way, what this little "black box"-platine does excactly?

I have got a Blackstone on my board, and I'm really happy with it...

Thanks a lot

kusi · Post by **kusi** » 01 Apr 2009, 15:10

perregrintuk wrote:Hey folks,

could any of you explain me in a short and understandable way, what this little "black box"-platine does excactly?

I have got a Blackstone on my board, and I'm really happy with it...

Thanks a lot

hi,
the "main-distorting-circuit" is on this gopped pcb. probably cmos-inverter-clipping.

thanks to mr. madbean for the funny pictures

regards, kusi

perregrintuk · Post by **perregrintuk** » 01 Apr 2009, 17:35

Hey Kusi,

so what I thought is done by transistors is at the Blackstone inside this chip, like a lot of transistors in one chip, or just like diodes?

Is the way Blackstone does it, a clean and good way or are there some "it could be done better" thoughts in your head?

While I was using the pedal I thought a couple of times about a chip inside the pedal, because if I used the "mid"-pot I always recognized besides the increasing of the mids that another drive character which goes strongly into the typical JRC4556 drive sound came up. Cool pedal...I love it.

Thanks

briggs · Post by **briggs** » 01 Apr 2009, 17:50

The circuit is using a CD40XX series chip, the cmos inverters that are in the chips are made up of mosfets. There is also an opamp in there too, you can see on the pictures. My guess is that this will be buffering the output of, and controlling gain to, the CMOS chip. I'm expecting the inverter stages to be cascaded into one another - emma reezaFRATzitz style.

culturejam · Post by **culturejam** » 01 Apr 2009, 18:24

briggs wrote: I'm expecting the inverter stages to be cascaded into one another - emma reezaFRATzitz style.

Similar to the Runoff Groove Double D?

http://www.runoffgroove.com/doubled.html

briggs · Post by **briggs** » 01 Apr 2009, 18:42

culturejam wrote:
briggs wrote: I'm expecting the inverter stages to be cascaded into one another - emma reezaFRATzitz style.
Similar to the Runoff Groove Double D?

http://www.runoffgroove.com/doubled.html

Yeah, something resembling that sort of design, with an op amp buffering any tone control networks.... I dunno, just a guess.

perregrintuk · Post by **perregrintuk** » 01 Apr 2009, 20:16

Sounds good.

@madbean: Will you try to reverse engeneer....?

madbean · Post by **madbean** » 01 Apr 2009, 20:28

Yeah, I'm working my way through the boards slowly.

perregrintuk · Post by **perregrintuk** » 01 Apr 2009, 20:32

Slow and exact, the best way to go. You're the man madbean!

jrc4558 · Post by **jrc4558** » 02 Apr 2009, 03:03

madbean wrote:This will whet your appetite, I think.

At first I thought it's an April Fools' joke.

Thanks for doing it for us man! Great!

Blackstone Appliances - MOSFET OD (2SV3.12) [ goop-alarm ] [traced]