madbeanpedals::forum

Projects => Build Reports => Topic started by: GrindCustoms on July 15, 2013, 06:34:37 AM

Title: Jacques et le haricot magique!
Post by: GrindCustoms on July 15, 2013, 06:34:37 AM
MadBean's Green Bean!

I used a On/Off/On SPDT for the comp, so it's Ge Ass/Lifted/Si Sym.

Bright and Fat switch, stacked OpAmps (JRC4558D/TL072)

Green enlightned tone pot   :D

(https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-frc3/1014168_491819877559974_2035997937_n.jpg)

(https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-prn1/r90/69002_491819840893311_1291132892_n.jpg)

(https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-prn1/994205_491819790893316_1751569432_n.jpg)

(https://fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-prn2/1069929_491819704226658_211151044_n.jpg)
Title: Re: Jacques et le haricot magique!
Post by: billstein on July 15, 2013, 08:48:26 AM
Love the look of that box. Nice build.
Title: Re: Jacques et le haricot magique!
Post by: pickdropper on July 15, 2013, 11:44:06 AM
Yeah, I always like the weathered boxes, Rej.  Looks great.
Title: Re: Jacques et le haricot magique!
Post by: gingataff on July 15, 2013, 02:36:57 PM
Looks great, a real giant killer  ::)
Title: Re: Jacques et le haricot magique!
Post by: GrindCustoms on July 15, 2013, 02:47:44 PM
Quote from: gingataff on July 15, 2013, 02:36:57 PM
Looks great, a real giant killer  ::)

Thanks,

I was out of insipiration for a thread name...., saw an add on tv with a magic bean.... :P

Quote from: pickdropper on July 15, 2013, 11:44:06 AM
Yeah, I always like the weathered boxes, Rej.  Looks great.

Glad you like it, it's the only thing i know how to do...hahahaha!
Quote from: billstein on July 15, 2013, 08:48:26 AM
Love the look of that box. Nice build.

Thanks Bill, i'll go take a shot at daylight...., the green and copper knobs works really well together imo.
Title: Re: Jacques et le haricot magique!
Post by: DutchMF on July 15, 2013, 04:13:23 PM
Hey Rej, nice as usual!! I'm having a hard time figuring out the 3PDT wiring scheme you used, care to share a diagram? Looks like a great way to make wiring those b@st2rds a bit neater!

Paul
Title: Re: Jacques et le haricot magique!
Post by: GrindCustoms on July 15, 2013, 04:21:38 PM
Quote from: DutchMF on July 15, 2013, 04:13:23 PM
Hey Rej, nice as usual!! I'm having a hard time figuring out the 3PDT wiring scheme you used, care to share a diagram? Looks like a great way to make wiring those b@st2rds a bit neater!

Paul

Sure thing, it got all the same advantages than Brian 3PDT wiring, just a different configuration, still bring the FX input to ground when in bypass.

It just works neater for me...

(http://www.grindcustomsfx.com/forum/download/file.php?id=12)
Title: Re: Jacques et le haricot magique!
Post by: GrindCustoms on July 15, 2013, 04:26:22 PM
Here's the thread with some discussion about 3PDT wiring and the different options.

http://www.grindcustomsfx.com/forum/viewtopic.php?f=5&t=50
Title: Re: Jacques et le haricot magique!
Post by: DutchMF on July 15, 2013, 05:15:15 PM
Thanks dude, that's pretty clear! I think I've gotten thrown off a bit by the lighted pot and the corresponding wire from the switch....

Paul
Title: Re: Jacques et le haricot magique!
Post by: wolfingsworth on July 16, 2013, 03:16:24 AM
I've seen this stacked op-amp thing before but didn't know the rules. Can you just stack them any time you want? What's the benefit/ effect?
Title: Re: Jacques et le haricot magique!
Post by: GrindCustoms on July 23, 2013, 09:39:37 PM
Quote from: wolfingsworth on July 16, 2013, 03:16:24 AM
I've seen this stacked op-amp thing before but didn't know the rules. Can you just stack them any time you want? What's the benefit/ effect?

From what i hear, the biggest benefit for me is when the diode are lifted, OpAmp clipping happens later than with a single opamp...but that could just be an illusion that i've created in my mind.

I've also noticed greater headroom or more width in the sound if i can say... when running the pedal at higher voltage....

But...main reason that i simply like to see some opamp humpin' action...lol