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MK1 or MK2 Small Stone


Post Posted Tue Jan 12, 2010 6:38 am
Analog-Umph


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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.
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Post Posted Tue Jan 12, 2010 8:29 am
GeeJee
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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. :mrgreen:
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Post Posted Tue Jan 12, 2010 1:00 pm
Beelooo


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

Thanks
Post Posted Thu Jan 14, 2010 10:54 am
Beelooo


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:cry: :cry: :cry:

Anyone for helping me ?
Post Posted Thu Jan 14, 2010 12:24 pm
Kanta
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Beelooo wrote::cry: :cry: :cry:

Anyone for helping me ?
I would if I could. :( There must be someone who can help, please. :?
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Post Posted Thu Jan 14, 2010 3:00 pm
Analog-Umph


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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 :D

Sine-ish for the Sovtek. (or lowpassed triangle)
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Post Posted Thu Jan 14, 2010 4:47 pm
Beelooo


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Thank you Analog

Any idea about the frequency range ? i don't find the information....
Post Posted Thu Jan 14, 2010 5:40 pm
Analog-Umph


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Neither did I.

I might be able to find out for you, if someone doesn't beat me to it. :wink:
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Post Posted Thu Jan 14, 2010 5:56 pm
radek tymecki


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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
Post Posted Thu Jan 14, 2010 7:42 pm
Beelooo


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







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