Tychobrahe Parachute Pedal SCHEMATIC

alexzanderepair · October 19, 2006, 12:29:32 AM

Im new to building pedals. Ive been trying to figure out the values of C3 and D1 on the schematic. can someone help and explain why the values arent there

alexzanderepair · October 19, 2006, 12:39:01 AM

http://www.geofex.com/FX_images/PARAPEDAL.gif

Alex C · October 19, 2006, 01:16:47 AM

At the bottom of the schematic it says "based on pictures of interior of pedal..." so maybe the code wasn't visible/legible?

R.G. · October 19, 2006, 07:59:42 AM

D1 does not matter. It's a reverse polarity blocking diode. Any 1A rectifier diode will be fine, such as a 1N4001 through 1N4007.

C3 was a mystery. But my simulation shows that the pedal works with its value being 0 - that is, left out. But I have not built one yet. It may be there for some side effect.

jonathan perez · October 19, 2006, 10:21:36 AM

some older vox schematics will leave out some resistors, too. maybe because its variable?

zpyder · October 19, 2006, 02:41:17 PM

What does this pedal sound like?

cheers,
zpyder

R.G. · October 19, 2006, 02:49:36 PM

A wah.

Paul Marossy · October 19, 2006, 03:22:40 PM

QuoteWhat does this pedal sound like?

A wah pedal, as RG said - but it doesn't sound like anything else out there, IMO.

DEZREJECT · March 17, 2007, 12:27:46 PM

what are the ics also in this schem?

u1 and u2???

Hanglow · March 17, 2007, 03:23:59 PM

I beleive the start of Electric Funeral by Black sabbath makes use of it. It's quite an interesting sound.

Robin Trower also uses it, although I don't know his stuff well enough to recommend a song to listen to offhand.

also there are a couple of soundclipps on the chicago iron website I think for their clone.

I am going to try a perfboard version of it after another couple of builds I think.

Hanglow · March 17, 2007, 03:29:43 PM

I think it uses 4558 opamps,

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Tychobrahe Parachute Pedal SCHEMATIC