Aleph 2 construction help

dshortt9 · 28th December 2002, 06:07 PM

I'm building Aleph 2's. How close (far away) should an input fet be from a toroid so it does not cause hum? is 2" ok?

dshortt9 · 28th December 2002, 08:04 PM

Any educated guesses are welcome. No Liability. I can change it later easily if it hums. It just looks better this way if 2" will work.

Peter Daniel · 28th December 2002, 08:24 PM

This is not an easy guess. It depends on many factors (type of toroid being one). I'd say it's OK, and when it hums just move it further away. But I doubt if the distance will make any difference.

You can also try to shield toroid with a copper tape.

dshortt9 · 28th December 2002, 10:00 PM

Thanks, Peter. At least I know I'm in the ballpark.

Mark A. Gulbrandsen · 29th December 2002, 03:55 AM

My toroid and pcb are at opposite ends of the chassis....but then my chassis is radically different from what most of you have done anyway.....I could have put the pcb and transformer next to each other, but it didn't make sense. I have a very small amount of hum and may try surrounding the toroid with a copper ring, or having some steel cans spun to enclose them completely for best shielding. Needless to say the front panels and anodizing are still to come......
Mark

dshortt9 · 29th December 2002, 04:11 AM

Thanks, Mark. Your amps look great!

Mark A. Gulbrandsen · 29th December 2002, 06:34 AM

Thanks! I just finished the second one and have had it on-line now for just over an hour........You will never regret building yours. I just improved my system about 5000%......
Both amps worked fine on forst power up too and that makes me really happy.

Nelson.....You Da Man!

Mark

28th December 2002, 06:07 PM	#1
dshortt9 diyAudio Member Join Date: Apr 2001 Location: Milwaukee, Wisconsin	Aleph 2 construction help I'm building Aleph 2's. How close (far away) should an input fet be from a toroid so it does not cause hum? is 2" ok?

28th December 2002, 08:24 PM	#3
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	This is not an easy guess. It depends on many factors (type of toroid being one). I'd say it's OK, and when it hums just move it further away. But I doubt if the distance will make any difference. You can also try to shield toroid with a copper tape. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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
aleph 3 construction (it's me again!)	ShanaVar	Pass Labs	5	24th February 2007 03:56 PM
Another Aleph ?? under construction..	blank527	Pass Labs	25	10th December 2002 09:57 AM
Aleph 2 construction problem!	alexmark	Pass Labs	1	14th October 2002 05:54 PM
Aleph 2 construction issues	Luke	Pass Labs	26	7th October 2002 09:01 PM
PCBs for Aleph 2, Aleph 3, Aleph 4 and Aleph 5 amplifiers	kristijan-k	Swap Meet	64	12th September 2002 07:55 AM

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

28th December 2002, 08:04 PM	#2
dshortt9 diyAudio Member Join Date: Apr 2001 Location: Milwaukee, Wisconsin	Any educated guesses are welcome. No Liability. I can change it later easily if it hums. It just looks better this way if 2" will work.

28th December 2002, 10:00 PM	#4
dshortt9 diyAudio Member Join Date: Apr 2001 Location: Milwaukee, Wisconsin	Thanks, Peter. At least I know I'm in the ballpark.

29th December 2002, 04:11 AM	#6
dshortt9 diyAudio Member Join Date: Apr 2001 Location: Milwaukee, Wisconsin	Thanks, Mark. Your amps look great!

29th December 2002, 06:34 AM	#7
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Thanks! I just finished the second one and have had it on-line now for just over an hour........You will never regret building yours. I just improved my system about 5000%...... Both amps worked fine on forst power up too and that makes me really happy. Nelson.....You Da Man! Mark

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