Aleph-2 PSU wiring layout question

moe29 · 21st August 2003, 01:20 AM

Is this a bad layout for my Aleph 2 power supply? I'm questioning
running the AC connection wires for the transformer between the
capacitors. I would run the wires along the floor of the amp and
then up to the AC inlet. For some reason i have a gut feeling that
this isn't such a good layout. It is convenient though because
that is the back panel of the amp. The fuse and switch would be
along side the AC inlet. Thanks for any input

wuffwaff · 21st August 2003, 09:56 AM

moe,

I don´t think it´s a problem to do it this way. Try to twirl the two wires for min. radiation.
Maybe you could even use shielded wire or make up a shield by cutting up some coax cable or use a small piece of iron tube.

In my Aleph the 230V also runs alongside the caps of one channel (couldn´t do it any other way) and I never noticed or measured any difference in hum /noise of both channels.

william

macka · 21st August 2003, 06:57 PM

Moe,

If you are concerned about induced hum radiation, air space is a great shield..says Doug Self.

In Self's articles and book he gives a good account of wiring practice for power amps. It is not nearly as critical for Class A as it is for Class B. I recall the ac wiring to and from the transformer should be twisted, but kept seperate from the earth (o volt) wiring and well clear of any signal wiring or boards.

More interesting is the so called star earth and feeback return points to minimise distortion.

macka

Nelson Pass · 21st August 2003, 07:26 PM

The truth is that the transformer itself is a much larger
contributor to magnetically radiated noise, and routing of
AC wiring is pretty non critical by comparison.

Just keep all of this as far away from the input stage as
you can.

macka · 21st August 2003, 07:34 PM

There you have it Moe,

The One and Only is watching over us.

macka

moe29 · 21st August 2003, 09:42 PM

Thanks Guys! I guess it is kind of funny to be worried about
a couple of wires when the transformer is sitting right there!
I just hadn't read much about how to run the wire connections.
Then again, i guess nothing beats wiring it all up and see how
it sounds. I will keep everyone posted

moe29

21st August 2003, 09:56 AM	#2
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	moe, I don´t think it´s a problem to do it this way. Try to twirl the two wires for min. radiation. Maybe you could even use shielded wire or make up a shield by cutting up some coax cable or use a small piece of iron tube. In my Aleph the 230V also runs alongside the caps of one channel (couldn´t do it any other way) and I never noticed or measured any difference in hum /noise of both channels. william __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Wiring / Layout question	kacernator	Tubes / Valves	4	23rd January 2009 06:29 AM
BrianGT's Aleph layout question	louischia	Pass Labs	1	5th April 2004 03:03 AM
Aleph 5 wiring question	martinschki	Pass Labs	1	16th February 2003 09:10 PM
Aleph 5 wiring question	PedroPO	Pass Labs	21	30th October 2002 03:43 PM
Layout question for aleph	hifi	Pass Labs	1	8th July 2002 06:55 PM

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

21st August 2003, 06:57 PM	#3
macka diyAudio Member Join Date: Dec 2001 Location: Australia	Moe, If you are concerned about induced hum radiation, air space is a great shield..says Doug Self. In Self's articles and book he gives a good account of wiring practice for power amps. It is not nearly as critical for Class A as it is for Class B. I recall the ac wiring to and from the transformer should be twisted, but kept seperate from the earth (o volt) wiring and well clear of any signal wiring or boards. More interesting is the so called star earth and feeback return points to minimise distortion. macka

21st August 2003, 07:26 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	The truth is that the transformer itself is a much larger contributor to magnetically radiated noise, and routing of AC wiring is pretty non critical by comparison. Just keep all of this as far away from the input stage as you can.

21st August 2003, 07:34 PM	#5
macka diyAudio Member Join Date: Dec 2001 Location: Australia	There you have it Moe, The One and Only is watching over us. macka

21st August 2003, 09:42 PM	#6
moe29 diyAudio Member Join Date: Dec 2002 Location: Florida	Thanks Guys! I guess it is kind of funny to be worried about a couple of wires when the transformer is sitting right there! I just hadn't read much about how to run the wire connections. Then again, i guess nothing beats wiring it all up and see how it sounds. I will keep everyone posted moe29