REISSUE TYCOBRAHE PARAPEDAL wha

Started by troubledtom, October 14, 2005, 12:00:21 PM

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Nikolay

Quote from: alteredsounds on October 14, 2005, 04:15:56 PM
3 big red caps marked ECI 683k 100v (?)

Ok lets find the missing parts of the puzzle
This 683 means 68n
At this way:
c2 - 68n
c4 - 68n
c5 - 68n

I look in this picture:
http://www.alteredsounds.com/tyco/t3.JPG
And in this view C1 is makred 103. This mean 10n
And now: what we have :)
c1 - 10n
c2 - 68n
c3 - ?????
c4 - 68n
c5 - 68n

Can you tell us waht is makred on C3? and we have completle all valuse of elements ;)

R.G.

I posted the schematic drawn from the alteredsounds.com photos on GEO (http://www.geofex.com), as well as two layouts. The first layout is generic, and probably needs some work. The second is more interesting. It should fit directly on the mounting studs in a crybaby shell. You might be able to modify a 10K dual pot and have a parapedal clone in a crybaby shell.

There are some schematic mysteries. It looks to be positive ground for reasons I can't figure out. And the polarity of C7 is backwards compared to what I think makes sense.

Can someone verify the layout and schematics against the photos?
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.

gez

Quote from: R.G. on October 24, 2005, 08:51:42 AMIt looks to be positive ground for reasons I can't figure out.

For many years, before those plastic jobbies became available, I used to do virtually all my circuits (op-amps, the works) as positive ground so that I could use a metal socket for a PSU.

If this unit has a socket for PSU, is it metal (or was it on the original)?  Anyone?

Just a guess...
"They always say there's nothing new under the sun.  I think that that's a big copout..."  Wayne Shorter