Aleph 30 building problems..

claes · 30th December 2001, 04:12 PM

Hi!
I'm currently building an Aleph30 amp. I have problems reading the schematic: Is R21 and C10 supposed to be connected to the emitter of Q5 or not (in aleph4 the corresponding components are not connected)? R20 and R15 is only connected to Q6 and Q9, right?
Thanks in advance,
Claes

GRollins · 30th December 2001, 04:30 PM

Claes,
R21 & C10 are in series between the base of Q5 and the feedback return. There is no connection between the emitter of Q5 and those two components.
R20 & R15 only connect to the first MOSFETs/sense resistors in the lineup (Q6 & Q9). Since the MOSFET banks are matched, those two transistors serve as good proxies for the behavior of the other transistors in their respective banks.

Grey

claes · 30th December 2001, 06:45 PM

Thanks a lot for your reply!
Claes

Nelson Pass · 31st December 2001, 07:35 PM

So Grey, are you available for adoption?

GRollins · 31st December 2001, 09:20 PM

Da, si, oui, ja, yes...
And I'm housebroken, too.

Grey

macka · 1st January 2002, 02:45 AM

Mr Pass,

Given that Grey has been of so much assistance with many of the Aleph diy bulders perhaps he could be a feature of your DIY gallery, maybe a pic or an article on one of Grey's projects.

best regards

Macka

30th December 2001, 04:12 PM	#1
claes diyAudio Member Join Date: Nov 2001	Aleph 30 building problems.. Hi! I'm currently building an Aleph30 amp. I have problems reading the schematic: Is R21 and C10 supposed to be connected to the emitter of Q5 or not (in aleph4 the corresponding components are not connected)? R20 and R15 is only connected to Q6 and Q9, right? Thanks in advance, Claes

1st January 2002, 02:45 AM	#6
macka diyAudio Member Join Date: Dec 2001 Location: Australia	Appreciation for Grey Mr Pass, Given that Grey has been of so much assistance with many of the Aleph diy bulders perhaps he could be a feature of your DIY gallery, maybe a pic or an article on one of Grey's projects. best regards Macka

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30th December 2001, 04:30 PM	#2
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Claes, R21 & C10 are in series between the base of Q5 and the feedback return. There is no connection between the emitter of Q5 and those two components. R20 & R15 only connect to the first MOSFETs/sense resistors in the lineup (Q6 & Q9). Since the MOSFET banks are matched, those two transistors serve as good proxies for the behavior of the other transistors in their respective banks. Grey

30th December 2001, 06:45 PM	#3
claes diyAudio Member Join Date: Nov 2001	Thanks a lot for your reply! Claes

31st December 2001, 07:35 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	So Grey, are you available for adoption?

31st December 2001, 09:20 PM	#5
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Da, si, oui, ja, yes... And I'm housebroken, too. Grey

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