Marshall - SV-1 Supervibe Chorus  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Marshall - SV-1 Supervibe Chorus

Postby hgamal » 31 Dec 2010, 21:02

I've got a Marshall Supervibe SV-1 but it is not working. Does anybody has its schematics?
hgamal
 
Posts: 46
Joined: 19 Feb 2008, 19:06
Location: Brazil
Has thanked: 0 time
Have thanks: 6 times

Re: Marshall Supervibe Chorus SV-1 schematics  [schematic]

Postby Valve Head » 01 Jan 2011, 12:01

Here are the schematics for the SV-1. This should get you started.
You do not have the required permissions to view the files attached to this post.

For this message the author Valve Head has received thanks: 5
Andy2No (01 Jan 2018, 19:41), chick33 (20 Apr 2015, 20:52), Dirk_Hendrik (01 Jan 2011, 19:54), IvIark (01 Jan 2011, 22:29), MickeyP73 (06 Jan 2014, 02:11)
Valve Head
 
Posts: 16
Joined: 07 Jul 2010, 02:02
Has thanked: 2 times
Have thanks: 14 times

Re: Marshall Supervibe Chorus SV-1 schematics

Postby roseblood11 » 01 Jan 2011, 12:15

How do you like the sound of that pedal? Is it worth making a layout?
roseblood11
Tube Twister
 
Posts: 1760
Joined: 23 Aug 2008, 15:21
Has thanked: 339 times
Have thanks: 306 times

Re: Marshall Supervibe Chorus SV-1 schematics

Postby JiM » 01 Jan 2011, 19:14

I'll have to look at it more closely, but the principle looks similar to the chorus in the stereo Valvestate amps.
For example, there are two LFOs, one of which is controlled by the RATE pot. The SWEEP pot mixes the constant LFO and the variable LFO.
User avatar
JiM
Diode Debunker
 
Posts: 908
Joined: 11 Mar 2008, 23:56
Location: France
Has thanked: 29 times
Have thanks: 37 times

Re: Marshall Supervibe Chorus SV-1 schematics

Postby Dirk_Hendrik » 01 Jan 2011, 19:53

roseblood11 wrote:How do you like the sound of that pedal? Is it worth making a layout?


I'd say no. These buggers are too cheap to go through the hassle of DIY.
Sorry. Plain out of planes.

http://www.dirk-hendrik.com
User avatar
Dirk_Hendrik
Old Solderhand
 
Posts: 4177
Joined: 03 Jul 2007, 09:44
Location: Old Amsterdam
Has thanked: 251 times
Have thanks: 1010 times

Re: Marshall Supervibe Chorus SV-1 schematics

Postby roseblood11 » 01 Jan 2011, 21:40

How is the bypass sound? I know the Vibratrem and the Guvnor2 from the same series, and they are tonesuckers.
A better buffer could be a reason to make a clone - or at least a mod for the original pedal...

Other idea: Is it possible to get a flanger sound out of this pedal? Chorus and Flanger are very similar circuits...

As a diy-layout would be quite large, a bb-enclosure would be needed anyway. So, it would make sense to have second footswitch to switch from chorus to flanger...

I saw this idea in this pedal: http://uk-electronic.de/onlineshop/prod ... 8a9a223116
But I guess that it´s digital (PT2399?) and a similar effect build around the mn3007 would be more interesting.

I listened to some samples of the SV-1 and I really like the sound of that little bastard, it would be a good starting point for a more complex pedal.
roseblood11
Tube Twister
 
Posts: 1760
Joined: 23 Aug 2008, 15:21
Has thanked: 339 times
Have thanks: 306 times

Re: Marshall Supervibe Chorus SV-1 schematics

Postby hgamal » 02 Jan 2011, 01:40

Valve Head wrote:Here are the schematics for the SV-1. This should get you started.


Thank you very much!
hgamal
 
Posts: 46
Joined: 19 Feb 2008, 19:06
Location: Brazil
Has thanked: 0 time
Have thanks: 6 times

Re: Marshall - Supervibe Chorus SV-1 [schematic]

Postby modman » 06 Jan 2011, 18:04

Moved from Requests to Modern Stompboxes
"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)
User avatar
modman
a d m i n
 
Posts: 4298
Joined: 19 Jun 2007, 17:57
Has thanked: 3107 times
Have thanks: 546 times

Re: Marshall - Supervibe Chorus SV-1 [schematic]

Postby guitarist » 27 Nov 2013, 05:16

I notice that this isn't true bypass at all! With my board and a Pete Cornish style tube buffer this thing goes way bright and a tad boosted when activated. So just wondering how I can draw that down so it plays fair.
guitarist
 
Posts: 5
Joined: 03 Jan 2010, 12:54
Has thanked: 0 time
Have thanks: 0 time

Re: Marshall - SV-1 Supervibe Chorus

Postby Andy2No » 04 Nov 2015, 12:34

I had trouble finding the PDF manual for one of these, which I like to have. I found plenty of links from googling, but they all turned out to be a link to a dummy file, containing another link, to a .exe installer - very dodgy.

So, I emailed Marshall and they sent me this (It's no longer on their website and hasn't been for a while). I asked permission to post it in a forum but never got a reply, so I'm taking that as a yes. If they, or anyone else, feels it should be removed, then please do, though I can't think of a good reason for doing that. Mostly, I hope to provide a google search result that does actually lead to downloading the manual, and doesn't lead to probably contracting a virus, or installing a trojan.
You do not have the required permissions to view the files attached to this post.

For this message the author Andy2No has received thanks:
Nocentelli (04 Nov 2015, 20:02)
Andy2No
Breadboard Brother
 
Posts: 55
Joined: 23 Sep 2015, 17:33
Has thanked: 123 times
Have thanks: 2 times

Re: Marshall - SV-1 Supervibe Chorus

Postby roseblood11 » 04 Nov 2015, 13:05

I love the sound of this pedal, but it never found its way onto my pedalboard, because of the background hiss. I guess it's caused by the 4066 that is used for the switching. Any ideas how to solve this?
roseblood11
Tube Twister
 
Posts: 1760
Joined: 23 Aug 2008, 15:21
Has thanked: 339 times
Have thanks: 306 times

Re: Marshall - SV-1 Supervibe Chorus

Postby Andy2No » 04 Nov 2015, 16:22

I only bought one recently, roseblood11, so I've only played with it briefly. I haven't noticed the hiss, so far. I have noticed a fairly large level boost when I turn it on, which I wasn't really expecting.

Could it be your power supply, or does it do it on a 9V battery too? Some pedals are more sensitive to that than others.

I normally use an 8 cell AA NiCd or NiMH pack fed through a 1A LDO 9V regulator - an LM2940T-9.0, with the usual capacitors to smooth it. That's a very low noise power supply (when run on the NiXX packs), compared to most wall wart style ones.

The Boss wall wart is supposed to be good (based on a youtube video comparison I saw), but it's a lot of money, for just a 200mA or so supply - I could probably make half a dozen of mine, for the same price, and I already had quite a few of those battery packs.
Andy2No
Breadboard Brother
 
Posts: 55
Joined: 23 Sep 2015, 17:33
Has thanked: 123 times
Have thanks: 2 times

Re: Marshall - SV-1 Supervibe Chorus

Postby Andy2No » 04 Nov 2015, 16:24

Have you checked the link in your signature recently, roseblood11? It doesn't work for me.
Andy2No
Breadboard Brother
 
Posts: 55
Joined: 23 Sep 2015, 17:33
Has thanked: 123 times
Have thanks: 2 times

Re: Marshall - SV-1 Supervibe Chorus

Postby roseblood11 » 04 Nov 2015, 18:55

Andy2No wrote:Have you checked the link in your signature recently, roseblood11? It doesn't work for me.

It#s dead since the german musikding forum runs with a new software. I#ll have to upload all my files again.
roseblood11
Tube Twister
 
Posts: 1760
Joined: 23 Aug 2008, 15:21
Has thanked: 339 times
Have thanks: 306 times

Re: Marshall - SV-1 Supervibe Chorus

Postby Andy2No » 04 Nov 2015, 21:20

roseblood11 wrote:
Andy2No wrote:Have you checked the link in your signature recently, roseblood11? It doesn't work for me.

It#s dead since the german musikding forum runs with a new software. I#ll have to upload all my files again.

I see. It's now http://musikding.rocks/wbb/ but I guess they cleared it all out and started again.
Andy2No
Breadboard Brother
 
Posts: 55
Joined: 23 Sep 2015, 17:33
Has thanked: 123 times
Have thanks: 2 times

Re: Marshall - SV-1 Supervibe Chorus

Postby AuditoryDriving » 05 Aug 2017, 04:06

wtf monday, this is a nuts and bolts forum, not a nuts and bots forum.

For this message the author AuditoryDriving has received thanks:
Andy2No (10 Aug 2017, 14:49)
User avatar
AuditoryDriving
 
Posts: 26
Joined: 17 Oct 2013, 06:55
Has thanked: 6 times
Have thanks: 2 times

Re: Marshall - SV-1 Supervibe Chorus

Postby roseblood11 » 12 Sep 2018, 18:09

Has anybody tried to improve this chorus in the meantime? It has some interesting tonal options, but with that tone sucking in bypass mode and all the hiss when it's on, it's not really usable.

Maybe replacing the cmos switching with a 3pdt and higher quality output buffers could help.
I made this silly looking layout for a Dimension - P chorus, but it should fit into te SV-1 easily.
Image
roseblood11
Tube Twister
 
Posts: 1760
Joined: 23 Aug 2008, 15:21
Has thanked: 339 times
Have thanks: 306 times


Return to Modern Stompbox Effects (1975 - ...)

Who is online

Users browsing this forum: alsirazi, electricb and 7 guests