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Old 28th May 2007, 08:42 PM   #1
Zen Mod is offline Zen Mod  Serbia
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to all greedy boyz
Default to all greedy boyz

new file at passlabs.com/np


hehe
type it

sorry if Papa already announce it

now you all can see how big Teaser he is...........
now -in line,and ........to Meka.............
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Old 28th May 2007, 08:52 PM   #2
twitchie is offline twitchie  Burkina Faso
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It looks expensive to build

How much heatsinking would you need for 5 channels?
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Old 28th May 2007, 09:02 PM   #3
Manu is offline Manu  Europe
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Default Re: to all greedy boyz

Quote:
Originally posted by Zen Mod
new file at passlabs.com/np
HVALA.

Manu
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Old 28th May 2007, 09:05 PM   #4
Vix is offline Vix  Yugoslavia
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Nice project for those who wanted Pass gear for their home theater.

( and have big transformers lying around )

Regards,

Vix
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Old 29th May 2007, 12:54 AM   #5
jupiterjune is offline jupiterjune  United States
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Well, it doesn't do ya much good without UGS 1, 2, and 3 now, does it?

Funny, I've been trying to find one for sale used. --there's no way I'd ever have the time to build one.
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Old 29th May 2007, 04:21 AM   #6
GRollins is offline GRollins  United States
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I believe there's a thread here about UGSs. The schematics in it may or may not be exactly what Nelson is using, but they will work.

Grey
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Old 29th May 2007, 09:57 AM   #7
h_a is offline h_a  Europe
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If I'm not completely mistaken, these are the UGS-threads:

http://www.diyaudio.com/forums/showt...threadid=86300
http://www.diyaudio.com/forums/showt...threadid=73931

Cheers, Hannes
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Old 29th May 2007, 10:39 AM   #8
h_a is offline h_a  Europe
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and here for the original ACAUDIO-UGS:

http://www.diyaudio.com/forums/showt...threadid=54826
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Old 29th May 2007, 01:48 PM   #9
CheffDeGaar is offline CheffDeGaar  Europe
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Great

Our great Philbyx is experimenting a version Follow links from here : http://www.diyaudio.com/forums/showt...32#post1167632

The schematic is a bit outdated, and a "Vbe multiplier" (a BJT based one, since the used output mosfets begin to conduct before a Mosfet bias control becomes active )

The first channel has been tested de auditu (wow,great, etc...) and the second channel in on the bench for testing. I think there'll be more to come quite soon.
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Old 29th May 2007, 03:49 PM   #10
CheffDeGaar is offline CheffDeGaar  Europe
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Something puzzling me...

A grand total of 40 Mosfets (8/channel). Bias per mosfet : 1A (470mV accross 0R47 source resistors) Supply at 32V.
So each mosfet idles at around 30W, leading to a total dissipation of 1.2kW at idle

Where did I go wrong ?
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