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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  Modding Boss SD-1 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Modding Boss SD-1  (Read 642 times)
jonathansuhr
Posts: 128


Modding Boss SD-1
« on: April 18, 2013, 08:29:26 AM »

If I replace all the electrolytic caps that are rated <50V, is the pedal safe to run on 18v?
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duck_arse
Posts: 1712



Re: Modding Boss SD-1
« Reply #1 on: April 18, 2013, 09:23:34 AM »

there is an internal zener diode to provide over-voltage protection. the value is not shown on my circuit, but it would be less than 15V, I'm guessing. these are fitted to stop damage from 18V adaptors, and the like.
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MartyMart
Posts: 6059


Martin L / Berlin for a while


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Re: Modding Boss SD-1
« Reply #2 on: April 18, 2013, 10:06:45 AM »

If I replace all the electrolytic caps that are rated <50V, is the pedal safe to run on 18v?

They might get a little large for the enclosure, 25v or 35v is fine and should be smaller - though check when you order them.

Yes the reverse protection diode will have to be replaced.

You will gain some headroom but it's not a huge change IMHO

M
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DougH
Posts: 6026


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Re: Modding Boss SD-1
« Reply #3 on: April 18, 2013, 10:35:30 AM »

Is that really you, John Suhr?...
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Electron Tornado
Posts: 668


Re: Modding Boss SD-1
« Reply #4 on: April 18, 2013, 01:12:51 PM »

If I replace all the electrolytic caps that are rated <50V, is the pedal safe to run on 18v?

18v is the max supply voltage for the 4558.
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roseblood11
Posts: 456



Re: Modding Boss SD-1
« Reply #5 on: April 18, 2013, 01:17:43 PM »

No, it's +/- 18V...
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wavley
Posts: 1736



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Re: Modding Boss SD-1
« Reply #6 on: April 18, 2013, 01:37:22 PM »

I don't get the benefit of adding headroom to this pedal, isn't it just going to be negated by the clipping diodes?
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Ben N
Posts: 3292

Ben N. - really! Now Israel, once Baltimore


Re: Modding Boss SD-1
« Reply #7 on: April 18, 2013, 03:23:24 PM »

I've got a Barber Direct Drive, which is sonically similar to an SD-1 (I use them almost interchangeably even though the Barber's midhump is slightly less pronounced) and advertised to be 18V-ready. I tried 18V for a while, but I honestly didn't hear much of a difference, if any, and it wasn't worth the extra wallwart.
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EATyourGuitar
Posts: 491


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Re: Modding Boss SD-1
« Reply #8 on: April 18, 2013, 07:24:27 PM »

I don't get the benefit of adding headroom to this pedal, isn't it just going to be negated by the clipping diodes?

maybe double up the diodes while your in there?
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