Wampler - Plextortion

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Postby call1800ksmyazz » 12 Jul 2007, 15:18

Ah cool Brian. I was wondering about the Plextortion. Sounded good. Same with the other Plexi pedal you sell.
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Postby indyguitarist » 12 Jul 2007, 16:22

bump
Last edited by indyguitarist on 02 Jan 2008, 19:34, edited 1 time in total.
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Postby call1800ksmyazz » 12 Jul 2007, 16:26

Oh awesome again :D . Seems like you have been doing great! :D
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Wampler - Plextortion

Postby plexilover » 14 Oct 2008, 13:03

hey guys,
anyone heard about? schematic?
greetings
andy
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Re: Wampler - Plextortion

Postby analogguru » 14 Oct 2008, 14:20

The search function is your friend - rumours say:
plextortion: marshall guv type circuit (1st version) with treble boost circuit on the end.


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Re: Wampler - Plextortion

Postby plexilover » 14 Oct 2008, 14:27

thanks but i didnt find anything on search function ;)
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Re: Wampler - Plextortion

Postby PurplePeopleEater » 14 Oct 2008, 16:23

plexilover wrote:thanks but i didnt find anything on search function ;)


The two pertinent comments I found searching for "Plextortion" were the aforementioned "Guv w/ treble boost" , and another where Brian says it's a "tweaked 1st version Guv".

I hope this helps, at least a little.
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Re: Wampler - Plextortion

Postby indyguitarist » 15 Oct 2008, 03:38

I'm flattered that my pedal was brought up. :)

I'll start from the beginning - I was always a huge fan of the old blues pearl 'perplexed' pedal, which is a modified guv'nor.
Let's start with this schem: http://www.freeinfosociety.com/electron ... php?id=476
The first version is a modded guv'nor, no additional parts.
c5: .22
r16: 1m, add 100pf in parallel.
remove c4
r6: 470k
c8: 100pf
c9: 1uf
r7: 10k
r1: 1k
c1: .22uf
diodes: 1n914+led, 1n914 on the other side.
IC: tl072 and 5532 on later versions.
500ka volume - iirc - I have since lost my original schem in a hard drive crash. :(


That didn't have enough highs, so I added a high boosting stage, similar to the tubescreamer tone control type, except it didn't tie back into the signal before the opamp (no additional low pass), this was called the 'presence'.

The next version had the same thing, except I added a basic jfet gain stage after that to boost the volume.



Next version, I dropped the presence control and added these changes:
r7: 1k
diodes: led's
c5: .1uf
c2: 47pf
ic: lm833

The last version is about the same - I *think* r8 is just a jumper IIRC.
component types: metal film
ic: 4580

der ya go! It's a good sounding little circuit, and the first and last "clonish" type of circuit I did.

:)

bw

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Re: Wampler - Plextortion

Postby indyguitarist » 15 Oct 2008, 03:40

I forgot - last two versions are 100ka volume pots, at the end of the jfet. resistors going to the jfet were 100k into it, 470k to ground IIRC - you may have to fiddle with the 470k for optimum tone though - I'm going from memory here. :)

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Re: Wampler - Plextortion

Postby indyguitarist » 15 Oct 2008, 04:22

I take it back - second 'cloneish' of sorts - analogecho, which is a modified delay that francisco of tonepad has on his site (i forget the name of it), but I pay francisco for it. :)

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Re: Wampler - Plextortion

Postby MoreCowbell » 15 Oct 2008, 05:50

Just sayin' "hello" Brian ! I hope all is well....and thanks for the info !

AC
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Re: Wampler - Plextortion

Postby ieatyouforbreakfast » 15 Oct 2008, 06:25

This is definitely why Brian is one of my favorites in the industry right now. Awesome.
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Re: Wampler - Plextortion

Postby ShortScaleMike » 15 Oct 2008, 11:42

Thanks Brian, I'm a big fan of this pedal, I'll definitely be breadboarding the design shortly.
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Re: Wampler - Plextortion

Postby plexilover » 15 Oct 2008, 15:04

thanks alot :)
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Re: Wampler - Plextortion

Postby erikm5150 » 15 Oct 2008, 15:34

indyguitarist, you are awesome! :thumbsup
Thanks for sharing the knowledge
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Re: Wampler - Plextortion

Postby ShortScaleMike » 15 Oct 2008, 22:37

I prototyped this this evening and it sounds great. Really nice tweaks on the original circuit.
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Re: Wampler - Plextortion

Postby bajaman » 16 Oct 2008, 00:58

Hi Brian
thanks for sharing the info - hope all is well with you. :D
Cheers
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Re: Wampler - Plextortion

Postby Lawnchair » 16 Oct 2008, 01:05

Heck of a nice guy, great ears and teaching skills. Thanks Brian.
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Re: Wampler - Plextortion

Postby indyguitarist » 16 Oct 2008, 16:16

glad to help - I'm getting ready to replace the plextortion pedals with a new distortion pedal which (IMO) sounds better and is more versatile - similar gain stages but the eq is a baxandall.

Brian
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Re: Wampler - Plextortion

Postby nooneknows » 04 Feb 2009, 18:22

hi,
is the Plexidrive based on a similiar circuit (maybe with a simplified tone stack)?
thank you
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