to all greedy boyz

Zen Mod · 28th May 2007, 07:42 PM

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.............

twitchie · 28th May 2007, 07:52 PM

It looks expensive to build

How much heatsinking would you need for 5 channels?

Manu · 28th May 2007, 08:02 PM

Quote:

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

HVALA.

Manu

Vix · 28th May 2007, 08:05 PM

Nice project for those who wanted Pass gear for their home theater.

( and have big transformers lying around

)

Regards,

Vix

jupiterjune · 28th May 2007, 11:54 PM

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.

GRollins · 29th May 2007, 03:21 AM

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

h_a · 29th May 2007, 08:57 AM

If I'm not completely mistaken, these are the UGS-threads:

UGS adventures
Pass X250 concept ?

Cheers, Hannes

h_a · 29th May 2007, 09:39 AM

and here for the original ACAUDIO-UGS:

X2_ugs3,4

CheffDeGaar · 29th May 2007, 12:48 PM

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The schematic is a bit outdated, and a "Vbe multiplier" (a BJT based one, since the used output mosfets begin to conduct before a Mosfet bias control becomes active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

CheffDeGaar · 29th May 2007, 02:49 PM

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 ?

28th May 2007, 07:42 PM	#1
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	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............. __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

29th May 2007, 08:57 AM	#7
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	If I'm not completely mistaken, these are the UGS-threads: UGS adventures Pass X250 concept ? Cheers, Hannes __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2/3 transistor kits

29th May 2007, 09:39 AM	#8
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	and here for the original ACAUDIO-UGS: X2_ugs3,4 __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2/3 transistor kits

29th May 2007, 02:49 PM	#10
CheffDeGaar diyAudio Member Join Date: Feb 2003 Location: This Universe, I think	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 ? __________________ /Cheff - Falling feels like flying, until you hit the ground

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28th May 2007, 07:52 PM	#2
twitchie diyAudio Member Join Date: Jul 2004 Location: Toronto, Canada	It looks expensive to build How much heatsinking would you need for 5 channels?

28th May 2007, 08:05 PM	#4
Vix diyAudio Member Join Date: Nov 2003 Location: Somewhere on Planet Earth	Nice project for those who wanted Pass gear for their home theater. ( and have big transformers lying around ) Regards, Vix

28th May 2007, 11:54 PM	#5
jupiterjune diyAudio Member Join Date: Nov 2006	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.

29th May 2007, 03:21 AM	#6
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	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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