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Old 19th July 2005, 01:27 AM   #31
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Hi Benson,

Referring to your posted schema. It's such a pity that it's sooo
wasteful of supply. That's the price you pay for running MOSFETs as source followers. The gigant has conceded and run higher drive supplies to reclaim some of the output losses.


Now if only they were to operate them as CE then they could go R2R. And guess what - the slew rate would go up..up !

Why? Anyone?

Cheers,
Greg
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Old 19th July 2005, 10:31 AM   #32
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hi,

I just want to make this clear ...

are the rails + - 81 ?

and seems also close to the 300watt hitachi mosfet amp or this would

be this, which was also posted sometime back...


Guru: is there something you can do improve this


rgrds,

hienrich
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Old 19th July 2005, 03:00 PM   #33
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Default 250W Crescendo

I built this as well! Mediocre sound but reaaaly good driving power. Never heard my my pair of Kef 105s sing so effortlessly. Fairly stable and ran for years without any problem but just like the other Crescendo members, midrange is slightly dark. Some female singers can sound as if they have a slight cold!! Playing around with the feedback capacitors can change the sound. Perhaps you can try different values or bypassing it with some PP caps. If you're looking for sound reinforcement, go for it!! Mine was built with all the recommended solid state devices without any bridging.

ckt
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Old 21st July 2005, 07:38 PM   #34
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choky that was not that a mean!!
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Old 22nd July 2005, 12:20 AM   #35
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by danne_linkinpar
choky that was not that a mean!!
for my knowledge-there are just 3 "Crescendos" :
1. mini Crescendo (just one pair of output fets)
2.Crescendo - two pair of outputs , and
3 . Gigant

you must wait 'till tommorow for scan of 2.

cheers!
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Old 22nd July 2005, 05:50 PM   #36
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Next week I gone to start built my Crecsendo Mosfet 250W from news paper "Elektor".
I wounder I somebody here have built this amplifer and haave some pichurse maby??
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Old 22nd July 2005, 06:49 PM   #37
joensd is offline joensd  Germany
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Quote:
3 . Gigant
The Gigant2000 is an entirely different amplifier.
One you forgot is the crescendo ME.

2. is already in sweden.
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Old 22nd July 2005, 06:52 PM   #38
joensd is offline joensd  Germany
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Quote:
haave some pichurse maby??
I want to see your amps!
posts 35-38 and 42.
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Old 22nd July 2005, 08:37 PM   #39
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But I have the part to the amplifer and not to the crescendo 2001
Someone that have some phothos of the Crescendo mosfet 250W?
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Old 24th July 2005, 04:49 AM   #40
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Here are Millenium Crescendo schematic for your reference. Same concept with previous Crescendo but it uses new Toshiba 2SK1530 / 2SJ201. I have a comnplete size is big, 2.9MB.
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