Build my own simple 9v voltage sag control?

[Sam]

yeah... i was just trying to give a good description of tube amp sag for new person, or other curious souls... a dying battery is a totally different thing... i'm gonna try a series resistance pot in front of a battery tho...thats a great idea and simple... i usually find that the simplest way to achieve a desired effect is the best sounding way too... zen and the art of signal shaping.
i've really got to stop typing "..." everywhere!
    any effects more prone to dying battery effects? fuzzes? tube screamers? i'm sure the tube screamer lot would give it a try:)
   what size pot to use ? 100kb?

Zvex suggest a 500k linear. That's what I'll try. I don't know yet which effects lend themselves well to voltage starvation. I first heard about voltage sag a few years ago in the context of a tubescreamer.