Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Aleph-X builder's thread.
Aleph-X builder's thread.
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
Reply
 
Thread Tools Search this Thread
Old 15th June 2018, 03:20 AM   #2661
GeeVee is offline GeeVee  Australia
diyAudio Member
 
Join Date: Jan 2007
Location: Adelaide, South Australia
Hi Eric
Thanks for your response. Greatly appreciated.
I reckon its safer to run the amps with the prescribed 22V rails. On reflection, my speakers are a nominal 4 ohms, so definitely better to go for higher current.

PS: do you see any issue with using the IRF 140 Fets, instead of the 240 as is commonly used?

Kind Regards
George.
  Reply With Quote
Old 15th June 2018, 06:03 PM   #2662
Eric is offline Eric  United States
diyAudio Member
 
Eric's Avatar
 
Join Date: Nov 2000
Location: Central PA, USA
Aleph-X builder's thread.
I don't have any personal experience with the IRF140 devices. I know others have used 044, 240, and 244 with good results...
__________________
My DIY Basement Theater, Aleph-X Amps, Avro Open Baffle Speakers, LDR based BA-3 pre, Pearl II, highly modded Technics SL-1200, F4, a40, several ACAs, FHXL, Tang Band 1772 bass-reflex
  Reply With Quote
Old 1st July 2018, 03:46 PM   #2663
Jakeh is offline Jakeh
diyAudio Member
 
Join Date: Feb 2001
Location: London UK
I have 6 unused original v1.0 boards now going spare if anyone is still looking.
  Reply With Quote
Old 1st July 2018, 04:30 PM   #2664
Earthquake is offline Earthquake  United Kingdom
diyAudio Member
 
Join Date: Dec 2010
Location: Isle of Wight
Default PCB

Iíd be interested in purchasing the boards please PM me with the cost etc
  Reply With Quote
Old 1st July 2018, 06:50 PM   #2665
mpmarino is offline mpmarino  United States
diyAudio Member
 
mpmarino's Avatar
 
Join Date: Jun 2004
Location: Northeast USA.
Quote:
Originally Posted by GeeVee View Post
..

PS: do you see any issue with using the IRF 140 Fets, instead of the 240 as is commonly used?

Kind Regards
George.
I've used IRF140 in every aleph I've done. Just keep in mind it's a 100V device.

Bonus: you need less of them.
__________________
Crazy Yankee.
  Reply With Quote
Old 16th July 2018, 06:04 AM   #2666
da9735 is offline da9735  Sweden
diyAudio Member
 
Join Date: Jun 2004
Location: West Sweden
Quote:
Originally Posted by Jakeh View Post
I have 6 unused original v1.0 boards now going spare if anyone is still looking.
I’d be interested in buying please PM me if still available!
  Reply With Quote
Old 26th July 2018, 12:08 PM   #2667
gorgona1977 is offline gorgona1977
diyAudio Member
 
Join Date: Mar 2017
Hello. I collected my Aleph X own and ran into a problem. Periodically, I have a slight crackling and rustling in the speakers. And it can appear at any time and just disappear. Or in the left channel, or in the right channel. Sometimes not strong, sometimes stronger. It does not depend on the temperature regime. May be immediately after switching on and can be after warm-up. And this sound is not like a rumble from an earth loop or overexcitation. More like a bad contact somewhere. I disassembled the amplifier, did not detect anything visually, the suspicious places on the boards were lost again, but the problem did not dare. What could it be? Thank you in advance for your help!
  Reply With Quote
Old 26th July 2018, 12:25 PM   #2668
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Aleph-X builder's thread.
usual things - check all mosfets for resistance between mid pin (drain) and heatsink ,check torque of screws, reflow any suspicious solder joints

often you can't see bad solder joint , but reflow helps
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 1st August 2018, 05:28 PM   #2669
Flushing Shadow is offline Flushing Shadow  Netherlands
diyAudio Member
 
Flushing Shadow's Avatar
 
Join Date: Feb 2014
Location: Flushing suburbs
Iím looking for the BOM for the original pcb, canít seem to find any info in the wiki or am i just looking in the wrong corner?

Thanks in advance!
  Reply With Quote
Old 1st August 2018, 06:32 PM   #2670
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Aleph-X builder's thread.
define original pcb
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote

Reply


Aleph-X builder's thread.Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


New To Site? Need Help?

All times are GMT. The time now is 04:33 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki