BlahBlahCafe - Jean-Michel Jarre forum

Anybody have an unmodified working MK1 or MK2 Small Stone?

I'm doing a test on the difference between the depth of phase on the newer and the older Small Stones.

I have heard there is no difference, except that the color should be more warm because it is vintage and more of that kind of flush. This is however a perfect subject for audiophiles like you, but to me the re-issue sounds great and the difference in sound to the old ones is neglectible.

About small Stone, what's exactlly the frequency range of the effect, and the type of modulation used (sine or triangle ?)

Thanks

Anyone for helping me ?

Beelooo wrote:

Anyone for helping me ?

I would if I could. There must be someone who can help, please.

Beelooo wrote:About small Stone, what's exactlly the frequency range of the effect, and the type of modulation used (sine or triangle ?)

Thanks

Triangle

Sine-ish for the Sovtek. (or lowpassed triangle)

Thank you Analog

Any idea about the frequency range ? i don't find the information....

Neither did I.

I might be able to find out for you, if someone doesn't beat me to it.

i don't know what waveform is used i belive it's triangle.

they sound pretty similar, maybe new mk3 is cleaner/brighter... i know that there were almost no changes in electronics. only some resistors were changed for example from 27 to 30k etc

mk1 and mk2 were identical. russian mk2 sovtek was a bit dirtier and had diffrent sweep range.

i made several modifications, some are mentioned on the internet. also thanks to michel geiss i performed mod that he did to jmj's phaser - 2 switches or 2 knobs are needed

I suppose there a way with schematics to calculate the sweep range, Fmax and Fmin ?