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Old 29th March 2005, 08:56 AM   #11
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Old 29th March 2005, 09:01 AM   #12
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Is there a thread with a definative schema for an upgraded BOSOZ? There seem to be several versions with different mods around on the forum.
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Old 29th March 2005, 09:17 AM   #13
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Hi,

I don´t think there´s a definite version cause everybody build it a bit different. I made one without CCS and plus and minus 60V supply and another one with CCS and +40V -20V supply.

Some use bjt´s for the current source others use fets. Some have 20mA bias, others up to 50mA.

Since the circuit is so simple and doesn´t use many (expensive)parts it is easy to build a few variations. The only thing you have to think of beforehand is if you want to try it without CCS. If so you´ll need a symmetrical power supply with at least +-30V.
A current source is always possible although with higher losses in case of a symmetrical supply.

What seems to be true for all those variations is that they sound very good without using all sorts of fancy caps and resistors.

William
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Old 29th March 2005, 09:17 AM   #14
steenoe is offline steenoe  Denmark
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Kari is working on a X-CCS-BosoZ layout.
Heatsinks for Bosoz?
Can't wait to get some of those boards

Steen
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Old 29th March 2005, 09:30 AM   #15
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Quote:
Originally posted by pinkmouse
There seem to be several versions with different mods around on the forum.
Mine with +/-30V rail.
Two CCS tails.
30mA bias.
No X-feedback.
I am staying hear with full satisfaction of the sound.

So far, I do not see any motivation for further mods.

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Old 29th March 2005, 10:17 AM   #16
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Quote:
Originally posted by jh6you

So far, I do not see any motivation for further mods.

Regards

That seems to be the general problem and that´s why there won´t be a definitive version.......

William
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Old 29th March 2005, 01:17 PM   #17
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So I like the one from "Metalman" (Terry)
CS_CSS_X_BOSOZ

Thomas
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Old 29th March 2005, 08:30 PM   #18
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I think the big advantege of the schematic from the first post of this thread is lack of the input cap.

The circuit kind of remind me Aleph P 1.0, that I like soniclly very, very much. I think this might be just a better version of it - IRF610 instead of IRF244 and negative CCS that allows to use no cap at the input.

Bartek
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Old 29th March 2005, 08:33 PM   #19
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I bet the aleph P1.7 is better right ? Since i have one already i guss i should just finnish that instead : O )

And change all the caps to nicer one's.
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Old 30th March 2005, 12:57 AM   #20
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I think it is good to review this from "Metalman"


CC-CCS-X-BZLS: It's alive!


Thomas
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