boss sd-1 bleed is annoying the hell out of me...

John Egerton · February 02, 2006, 07:15:45 PM

hey guys...

i've read the reports on here and i have tried switching the 2 FETs with J201's and the distorted signal was still coming through the bypassed signal slightly...

So I went further and tried 2n5485's instead

both in q1 and q2 as i believe these are responsible...

does anyone have a definitive fix for this bleed through problem as I understand keeley modded sd-1's have been fixed.

thanks

john

twabelljr · February 02, 2006, 11:09:32 PM

Hi John. I recommend you read this thread http://www.elixant.com/~stompbox/smfforum/index.php?topic=23903.0
(if you haven't). It talks about the SD-1 bypass problem and ALOT of good advice
and reports of "fix" attempts. I do not have an SD-1, so I have no first hand experience
with this concern, but I believe you would pick up a few good tips. Also, reply #42
by shredgd seems to be the hot thing. He refers to this mod :http://forum.musikding.de/attachements/Boss_SD-1_mod_c.gif
Well I hope this is of help to you. Good luck.

Tommy

AC30Dirty · February 10, 2006, 03:02:51 AM

I use to own a sd-1 that i modded and i had the same problem. I tried everything but it just wouldn't go away.

BUT i did find a solution recently. monte allums sells a kit to remedy this problem. I have tried some of his mods and they sound really good so I would trust him on this one. Check it out it might help.

http://www.monteallums.com/Product_links.html

puretube · February 10, 2006, 03:50:12 AM

interesting link...

wampcat1 · April 17, 2006, 02:22:19 PM

Quote from: puretube on February 10, 2006, 03:50:12 AM
interesting link...

Yes, makes you wonder.

I just tried it myself with a j201 and figured I'd post a diagram in case anyone wants to do it to theirs. I increased the gain tons for experimental reasons and installed this little circuit. Bypass distortion fixed!

http://community.webshots.com/album/549577402JRyhRz

I tried to upload it to my space in the layout gallery but it wouldn't let me log on...it kept asking me to debug an error!

bw

vanhansen · April 17, 2006, 02:36:11 PM

Man, seeing this thread reminds me once again that I need to do this fix to mine.

It's had this problem forever and I just never did anything with it. Could be that I don't use it much.

beatstrat · April 17, 2006, 07:33:33 PM

I've been using an SD-1 for years without ever having a problem with this. Am I the only one? Are only some units plagued with dist-bleed? (I can't imagine)...

wampcat1 · April 17, 2006, 08:38:23 PM

increase r6 to 1k and then you'll see what we mean.

bw

blustrat · April 19, 2006, 04:12:44 AM

Hello everybody!
I am very happy with my modded sd-1 since i solved the common bleed problem.
All you need is only 1 diode 1 cap and 1 jfet.
As wampcat says it really works! I don't remember the trhead where i find it, infinite thanks for that anyway.
My sd-1 seems to be a true bypass pedal now!
I also made a little diagram
http://togusa.altervista.org/sd1_bleedfix.JPG
copy and paste to another window if link doesn't work.
Sorry for my bad english again.
Ciao...

puretube · April 19, 2006, 04:20:50 AM

is this link:
http://www.diystompboxes.com/smfforum/index.php?topic=44425.0
related to this thread?

blustrat · April 19, 2006, 04:26:14 AM

Humm...don't know if it is the same mod.
I am going to find the trhead where i find it and post here the link.

rockgardenlove · April 19, 2006, 05:01:42 AM

That pic you posted didn't work blustrat...can you try and post again?

puretube · April 19, 2006, 05:08:02 AM

copy link, and paste it in new window...

wampcat1 · April 19, 2006, 07:30:19 AM

Quote from: puretube on April 19, 2006, 04:20:50 AM
is this link:
http://www.diystompboxes.com/smfforum/index.php?topic=44425.0
related to this thread?

Yes.. sort of -- I posted this:
http://www.indyguitarist.com/temp/sd1-bypass-fix-406.gif

and Robert emailed me and told me that I stole that idea off of him. To avoid any issue, I posted this:
http://www.diystompboxes.com/smfforum/index.php?topic=44425.0

Honestly, I just don't want to be blamed for being a thief.

bw

Gus · April 19, 2006, 10:48:23 AM

Muting is old

muting has been used in electronics for years, see that button on your TV remote?

Older CD players used BJT mutes on the output lines

Muting Muting Muting Muting Muting Muting Muting Muting

Jay Doyle · April 19, 2006, 11:07:02 AM

Keeley was accusing someone of stealing?

You have got to be kidding me. At least he knows what it feels like.

No more from me.

cd · April 19, 2006, 11:13:25 AM

The musikding mute works perfectly. Use it.

Doug_H · April 19, 2006, 11:31:44 AM

BTW kids, you can easily do this sort of thing at home with your DIY stuff with a dpdt/3pdt switch. No need for transistors and etc if there's no electronic switch. No one's patented that idea yet that I know of...

Quote from: Jay Doyle on April 19, 2006, 11:07:02 AM
Keeley was accusing someone of stealing?

You have got to be kidding me. At least he knows what it feels like.

No more from me.

Yeah, anyone remember Frank Clarke?

It's funny watching the modders stake out their territory and square off over something as banal as a mute. On the surface though, I got the biggest kick out of the 'adapting the TS-9 mod to an SD-1' comment. As if that's a stretch...

The mod biz is always entertaining to watch. I'm getting some popcorn...

Doug

TELEFUNKON · April 19, 2006, 12:36:06 PM

Doug: is that seat next to yours taken already?
I`d share some drinks to go with the popcorn.

Unbeliever · April 19, 2006, 01:11:18 PM

Quote from: Doug_H on April 19, 2006, 11:31:44 AM
Yeah, anyone remember Frank Clarke?

Yup, but I wasn't going to be the one to bring it up first .... it's pretty easy for hype to wash away the 'history' of how things got started!

News:

boss sd-1 bleed is annoying the hell out of me...

Jay Doyle

Doug_H