News:

SMF for DIYStompboxes.com!

Main Menu

but ge diodes...

Started by Loggie, March 18, 2006, 03:28:14 PM

Previous topic - Next topic

Loggie

are for overdrive?
not for distortion?
what happens to the sound in overdrive with ge diode?
and in a distortion (for example ds1)?

AzzR

Ge Diodes Give Softer Clipping

Si Diodes Give Harsher Clipping

Dream
A Broken Clock Is Right Twice A Day

brett

Hi.
Combinations count!  Ge + Si make special hybrid magic.
cheers
Brett Robinson
Let a hundred flowers bloom, let a hundred schools of thought contend. (Mao Zedong)

WGTP

Ge's sound fuzzey to me.   :icon_cool:
Stomping Out Sparks & Flames

R.G.

Quoteare for overdrive?
not for distortion?
what happens to the sound in overdrive with ge diode?
and in a distortion (for example ds1)?
QuoteGe Diodes Give Softer Clipping
Si Diodes Give Harsher Clipping
QuoteGe's sound fuzzey to me.

(1) overdrive and distortion cannot be clearly separated; they have been overused in marketing hype so that there is no clear demarkation, even if there was one in the sound. So distinguishing between overdrive and distortion is not possible without further defining what you mean by the terms.
(2) it's not possible in general to meaningfully say that Ge or Si have certain clipping characteristics without specifying other things. The nature of clipping from one kind of diode versus another cannot be determined without also saying how big a signal you apply, and whether there is any forward or reverse bias on the diode, and what waveform you feed the clipping diode. For instance- if you feed a square wave to any clipping diode, you get out a square wave. If you feed a sine wave with 100x the magnitude of the clipping voltage to an clipping diode, you get out a square wave.

The only way you can make meaningful statements about what kind of clipping a diode does is to specify the diode, the signal being applied to it, the source impedance (voltage mode clipping sounds different from current mode clipping) and crucially, the relative size of the clipping knee to the slope of the input signal being put into it. I've berated this point before - if the signal does not slope as it goes through the clipping knee, it might as well be a square wave. It's only when there is some slope that clipping knees can be distinguished. Even then, the amount of the signal voltage that happens while the signal passes through the clipping knee is crucial to how clipped the signal is.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

freak scene

i have monkeys to do my clipping.

aron


Toney


In bedroom at lower volume.......Si diodes do nice clipping

At stage volume with a tube amp........you will find all kinds of lovely tones you didn't know about with Ges...