DS-1 Voltage Sag Mod?

5

'59

New member
Hey fellas, I'm modding another DS-1 and was wondering if y'all knew whether or not there would be any value to adding a knob to starve the voltage.

What can I expect from this mod and what tips do you guys have for it? I hear it's the mod is simply adding a small pot inline with the power supply and as I turn it down it makes it more compressed and synth like.
 
That sounds like a lot more trouble than it would be worth. Also, is there a way to boost voltage? I'm pretty sure DS-1s are built to handle at least an extra volt or two.
 
Francois said:
Try first with an exhausted 9V battery and see...
Click to expand...

I 2nd that motion. Take this with a grain 'o salt because I've never actually done it . . . but I believe "sag" is slightly different than just a lower voltage. A weak battery could actually show 9-volts, then drop in current when loaded. A lower voltage power supply would still have full current capability. I believe it's the sag in current, more so than a sag in voltage, that creates that affect.

But again, I'm not positive about that.
 
ArtieToo said:
I 2nd that motion. Take this with a grain 'o salt because I've never actually done it . . . but I believe "sag" is slightly different than just a lower voltage. A weak battery could actually show 9-volts, then drop in current when loaded. A lower voltage power supply would still have full current capability. I believe it's the sag in current, more so than a sag in voltage, that creates that affect.

But again, I'm not positive about that.
Click to expand...

literally as I read this
the pedal show had this
at around 19 minutes in
Josh gives the breakdown of dying battery voltage sound

 
Francois said:
Cool; Many possibilities...
Would it work with my Digitech Whammy v2 ? (I lost its power supply).
Click to expand...

No, and it wouldn't make sense to use it for that. First of all, the Digitech Whammy is a rather high current device, and the Voodoo Labs supplies only offer sag voltage on 100ma outputs. Second, sag voltage only really makes sense on analog circuits where it can affect things like headroom and possibly frequency response. Digital devices (like the Whammy) either work of they don't, and they're more likely to not work with insufficient voltage.
 
TMD said:
A sag in voltage in a power supply would yield a corresponding sag in current — not in current capacity, but in actual current delivered. This is simply because these power supplies act like voltage sources and deliver current according to I = V/R.

A battery — especially a dying battery — behaves less like an ideal voltage source and (I think) has a higher output impedance such that when higher currents are demanded, the internal voltage drop across the output impedance becomes more and more significant.
Click to expand...

Yup, yup. You are correct. I plead senility. :)
 
My Decibel 11 Hot Stone Deluxe has the option to sag. With modulation pedals, it added artifacts like chirps to my choruses. There were some cool effects with overdrives and distortions. However, these were sounds I would like to toggle not have always on. BTW the Hot Stone was designed and built by guys that left VooDoo Labs.
 
"Hot grandma"= no sag.
So, if lowering the voltage produces sag, does increasing it tighten things up?

Sent from my SM-A115A using Tapatalk
 
ehdwuld said:
1st
it warms my heart that you read my post

second
it will lest the tone smoke out
Click to expand...
As Dave Mustaine once said, "got nothing better to do."
And thanks for the info. Don't want to let the smoke out, for sure.

Sent from my SM-A115A using Tapatalk
 
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