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 Push/Pull Mods for SD-1
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NannerPuddin
Copper Member

USA
11 Posts

Posted - 05/29/2008 :  17:43:23  Show Profile  Reply with Quote
I have done some mods on an SD-1, and I wish a couple of them to be activated by push/pull pots on the level and drive knobs. Does anyone around here know where to find these pots for this?

Thanks,

Doug

Laurie
Double Platinum Member

Canada
4854 Posts

Posted - 05/29/2008 :  18:35:01  Show Profile  Visit Laurie's Homepage  Reply with Quote
G;day and welcome NannerPuddin!

Have a look at these guys:
http://www.smallbearelec.com/Detail.bok?no=619


PS: now that's a really clever idea... can't believe I haven't thought of it myself



Edited by - Laurie on 05/29/2008 18:39:38
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pedals 4 pv
Platinum Member

Canada
1351 Posts

Posted - 05/29/2008 :  20:03:28  Show Profile  Reply with Quote
Yes that is a good idea. welcome to the forum NannerPuddin.
Guitar fetish has those pots cheap
http://store.guitarfetish.com/guelco.html

Edited by - pedals 4 pv on 05/29/2008 20:05:09
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 05/30/2008 :  08:36:00  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi NannerPuddin

Welcome to the forum from Australia.

Regards Dr. Bob
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NannerPuddin
Copper Member

USA
11 Posts

Posted - 05/30/2008 :  14:41:52  Show Profile  Reply with Quote
Thanks for the welcome and the responses! I have lloked at both sites and I am a bit confused. The Level pot that I hgave is marked M10k� 62C and the Drive pot is M1M� 62c. Do I need to get the exact pot values? I would think so, but I don't know. I found the 1m� on smallbear, but not the other.

Thanks,

DOug

P.S. Great forum!!!!!
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ChristoMephisto
Platinum Member

Canada
1288 Posts

Posted - 05/30/2008 :  16:01:56  Show Profile  Reply with Quote
Watch out for cheap commercial audio pots, awful taper
I put a push/pull pot in my wah for the Q and Volume switch,
The 250k pot didn't reach 100k till about 7 or 2:00 on the dial
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NannerPuddin
Copper Member

USA
11 Posts

Posted - 05/30/2008 :  20:30:42  Show Profile  Reply with Quote
Well, I ordered the 1M from small bear and am still trying to find a solution for the 10k push/pull pot. I know there must be some way to do it, because the analogman.com guy puts one on the level pot of one of his SD-1 mods.

I guess I will keep looking......

Thanks again,

Doug
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stahlhart
Platinum Member

1318 Posts

Posted - 06/04/2008 :  05:34:35  Show Profile  Reply with Quote
These are linear taper; I'm guessing that you're after audio taper for the 10K level control?

http://www.mouser.com/Search/Refine.aspx?Ntt=313-1601F-
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NannerPuddin
Copper Member

USA
11 Posts

Posted - 06/05/2008 :  16:47:10  Show Profile  Reply with Quote
I saw that mouser page. I thought that I needed audio taper, but am I wrong on this? I know that Analogman uses a push/pull on the level control on one of there SD-1 mods, but wouldn't it have to be a 10k audio?

Is there any way to tell if the stock pot is Linear or Audio? It sure would be great if one of these from Mouser would work!

Thanks,

Doug
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stahlhart
Platinum Member

1318 Posts

Posted - 06/05/2008 :  23:41:43  Show Profile  Reply with Quote
You can put an ohmmeter across the center and one of the outer lugs, and then observe the resistance change as you rotate the control (it's slightly easier with an analog meter). You'll either see a fairly constant change in resistance from minimum to maximum, or most of the change will occur at the last fraction of rotation, and from there you'll note whether the taper is linear or logarithmic, respectively.

You'd think that for something affecting perceived change in loudness, you'd want a logarithmic (audio) taper, but then the volume control in my Ampeg GU-12 amp is 1M linear. Go figure...

More info:

http://www.geofex.com/Article_Folders/potsecrets/potscret.htm
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NannerPuddin
Copper Member

USA
11 Posts

Posted - 08/02/2008 :  17:24:35  Show Profile  Reply with Quote
I measured the pots, and both are linear. I happened to find a 10k linear online and bought it. I installed it a couple of days ago. I still can't find a 1m linear push pull for the second mod. Well, actually, I did find one on the Weber site, but I don't think it is a mini, and thusly, would no fit. I am enjoying though having this project almost done!

Doug

P.S. I'll try to post some pics soon.
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