Fet switching and buffering layout

Started by AM, March 22, 2011, 06:08:53 PM

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AM

I'm trying to built a circuit that uses the Boss style buffer and switching system. I want to house the board in a Boss enclosure. Does anybody have a layout of the buffer switching circuit? I found a coupe of diagrams on the net but I'm not sure they are verified and what I need.
Thanks in advance. I would appreciate any help.

AM


brett

Many copies of original Boss schematics are avilable on the net, clearly showing the JFETs and associated bits in the buffer.
Brett Robinson
Let a hundred flowers bloom, let a hundred schools of thought contend. (Mao Zedong)

AM

I found some schematics and the following article, which I've been studying a lot. The problem is I'm not really sure I can translate the flip flop switching diagrams into the vero layout I'm working on.

http://www.premierguitar.com/Magazine/Issue/2007/Jun/JFET_Switching.aspx

R.G.

You may want to read the expanded article at my web site geofex.com on the technology of Boss switching.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

Mark Hammer


AM

Thanks Mark and R.G.
I studied the suggested schematics and I think I have a better understanding now.
What I wanna do is this: I have a Boss MT2 and I want to remove all the circuit parts except the switching and the input and output buffers. Then I will install my own distortion circuit at the place of the MT-2's distortion and eq portion of the circuit.
I found a post about trying to do the opposite of what I want to do. Basically people were trying to true bypass a Boss MT-2.
I uploaded the schematic I found in the mentioned post and another picture where I blanked out the parts which need to go. I'm linking to them below. Can you have a quick look at them if you have a chance? Am I correct in what I drew?
I wouldn't mind keeping the eq section intact but I think it's too complicated to me to the wiring in this case.
Links:
https://picasaweb.google.com/harm.on.x/MT2?authkey=Gv1sRgCKO48b6IlPODWw#5589275267693284578
https://picasaweb.google.com/harm.on.x/MT2?authkey=Gv1sRgCKO48b6IlPODWw#5589277601496292962