Aleph-X builder's thread. - Page 9

usekgb · 27th February 2004, 08:32 AM

Are you getting close to finishing yours Mark? I'd love to see it. I was working on my Zen V4 today, and broke the tap off in the heat sink.

. I'll have to get it out and finish it up before I can start on my AX's.

Cheers,
Zach

Mark A. Gulbrandsen · 27th February 2004, 01:20 PM

Zach,
Will all you at work today.. Getting that tap out is actually pretty easy.
Mark

Nelson Pass · 27th February 2004, 06:34 PM

Quote:

Originally posted by Mark A. Gulbrandsen
However, it was a wonderful evening and I rarely pull out the old Racal 5003.... I was just way too tempted...

I understand. I like to watch my hard disk get defragmented.
It gives the illusion of progress.

JCoffey · 27th February 2004, 09:20 PM

You dont know how good that makes me feel to hear, Mr. Pass. I work with computers for a living, and I have been known a few times to watch it get the ole Defrag....

andrew li · 28th February 2004, 03:22 AM

would anyone please inform me
how to select r2 r3 r42 r43
for different power o/p and different speaker impendance

hifiZen · 28th February 2004, 08:53 AM

These resistors should be the same as R5, R6, R41, R41... These are known as source resistors, and the calculation to find their value is explained here , under 'Calculating Circuit Values'.

The 'total bias current' needs to be known first, and you can use the spreadsheet to figure that out based on your desired power output and speaker impedance... Calculation Spreadsheet

Mark A. Gulbrandsen · 29th February 2004, 05:47 AM

"I cant wait to see results from mark's amp... i hope it goes well "

I might have some results to post tommrrow..... The first board has been completely built up since Thursday night.... Just have to wire up a temp. power supply and see what she does.....

Regarding toroids......

A friend just ordered a Victoria Magnetics toroid for his Aleph 3 project and it ran him less than 80.00 for a custom 500VA toroid. I also bought a custom VM toroid for my Mini Aleph. That was a 320 VA unit and it ran me about 60.00 shipped. These are super reasonable prices for custom trannys and the quality is as good as the best out there. You might consider getting one large unit wound for your multi channel X.

www.victoriamagnetics.com

Mark

moe29 · 29th February 2004, 05:59 AM

i finished populating the second channel tonight. Now I'm just
mulling over wether to make mono-blocks or a stereo amp. Since
i hate building chassis... i'm wondering if i should just go for both
channels in one chassis, sharing a transformer and PSU. I figure
something like a 750VA transformer should handle both channels
without any problems, with 15 volt secondaries... or is this a bad idea?

Prune · 29th February 2004, 06:16 AM

The thing I like about monoblocks is that you can use shorter speaker cables.

yoke · 29th February 2004, 08:09 AM

Hi...
What is easiest way to check if mosfet ( IRFP2410 ) is broken or not...
I would like to check mosfets before I solder them down...

Thanks
Josip

28th February 2004, 03:22 AM	#85
andrew li diyAudio Member Join Date: Jan 2004 Location: hk	hi power version would anyone please inform me how to select r2 r3 r42 r43 for different power o/p and different speaker impendance

28th February 2004, 08:53 AM	#86
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	These resistors should be the same as R5, R6, R41, R41... These are known as source resistors, and the calculation to find their value is explained here , under 'Calculating Circuit Values'. The 'total bias current' needs to be known first, and you can use the spreadsheet to figure that out based on your desired power output and speaker impedance... Calculation Spreadsheet __________________ - Chad.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

27th February 2004, 08:32 AM	#81
usekgb diyAudio Member Join Date: Feb 2003 Location: Salt Lake City, UT, USA	Are you getting close to finishing yours Mark? I'd love to see it. I was working on my Zen V4 today, and broke the tap off in the heat sink. . I'll have to get it out and finish it up before I can start on my AX's. Cheers, Zach

27th February 2004, 01:20 PM	#82
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Zach, Will all you at work today.. Getting that tap out is actually pretty easy. Mark

27th February 2004, 09:20 PM	#84
JCoffey diyAudio Member Join Date: May 2003 Location: Atlanta, GA	You dont know how good that makes me feel to hear, Mr. Pass. I work with computers for a living, and I have been known a few times to watch it get the ole Defrag....

29th February 2004, 05:47 AM	#87
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	"I cant wait to see results from mark's amp... i hope it goes well " I might have some results to post tommrrow..... The first board has been completely built up since Thursday night.... Just have to wire up a temp. power supply and see what she does..... Regarding toroids...... A friend just ordered a Victoria Magnetics toroid for his Aleph 3 project and it ran him less than 80.00 for a custom 500VA toroid. I also bought a custom VM toroid for my Mini Aleph. That was a 320 VA unit and it ran me about 60.00 shipped. These are super reasonable prices for custom trannys and the quality is as good as the best out there. You might consider getting one large unit wound for your multi channel X. www.victoriamagnetics.com Mark

29th February 2004, 05:59 AM	#88
moe29 diyAudio Member Join Date: Dec 2002 Location: Florida	i finished populating the second channel tonight. Now I'm just mulling over wether to make mono-blocks or a stereo amp. Since i hate building chassis... i'm wondering if i should just go for both channels in one chassis, sharing a transformer and PSU. I figure something like a 750VA transformer should handle both channels without any problems, with 15 volt secondaries... or is this a bad idea?

29th February 2004, 06:16 AM	#89
Prune Account Disabled Join Date: Mar 2003 Location: Vancouver	The thing I like about monoblocks is that you can use shorter speaker cables.

29th February 2004, 08:09 AM	#90
yoke diyAudio Member Join Date: Jan 2004 Location: Split	Hi... What is easiest way to check if mosfet ( IRFP2410 ) is broken or not... I would like to check mosfets before I solder them down... Thanks Josip

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)