DS-1 Voltage Sag Mod?

['59]

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.

[Francois]

Try first with an exhausted 9V battery and see...

['59]

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.

[ehdwuld]

get a power supply with adjustable output

find out where you like it
then put a switch resistor to get there

https://www.amazon.com/3V-Adjustable...s%2C251&sr=8-9

[dystrust]

get a power supply with adjustable output

find out where you like it
then put a switch resistor to get there

https://www.amazon.com/3V-Adjustable...s%2C251&sr=8-9

+1

This is literally what the 'sag' outputs on Voodoo Labs power supplies are for.

[ArtieToo]

Try first with an exhausted 9V battery and see...

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.

[Demanic]

"Sag"
Nothing good comes to mind when I hear that word.

Sent from my SM-A115A using Tapatalk

[ehdwuld]

"Sag"
Nothing good comes to mind when I hear that word.

Sent from my SM-A115A using Tapatalk

hot grandma comes to mind

[ehdwuld]

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.

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

[ArtieToo]

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

Ah, cool. That's why I said "a grain 'o salt."

BTW, here's a good and comprehensive article on battery sag that I had forgotten about when I posted. It even includes a simple "sag" circuit.

http://www.muzique.com/lab/batteryz.htm

[Francois]

+1

This is literally what the 'sag' outputs on Voodoo Labs power supplies are for.

Cool; Many possibilities...
Would it work with my Digitech Whammy v2 ? (I lost its power supply).

[ehdwuld]

Cool; Many possibilities...
Would it work with my Digitech Whammy v2 ? (I lost its power supply).

what voltage does the Whammy want?
and is it DC?

[dystrust]

Cool; Many possibilities...
Would it work with my Digitech Whammy v2 ? (I lost its power supply).

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.

[ArtieToo]

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.

Yup, yup. You are correct. I plead senility.

[Securb]

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.