Improvements - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 27th May 2006, 08:43 AM   #1
diyAudio Member
 
Join Date: May 2006
Question Improvements

Hello All!!

Came across this design, I like it but maybe there are areas for improvement!

Like BJT BC546B, hes just to noisy for my liken
changing to BC550C must be a good choice

Whats your ideas??
I have two 625 trannies, one for each mono

Thanks for your input
Attached Images
File Type: jpg alpeh-x 100.jpg (85.3 KB, 846 views)
  Reply With Quote
Old 17th June 2006, 11:29 PM   #2
diyAudio Member
 
Join Date: Sep 2005
Hello lplate

I to am using this design, in fact just populating the board.
im using BC 546B for Q2,Q3,Q8,Q9.
Any progress in your decision/s of the improvment/s

Has any one elsed used this design?

Cheers Dan
  Reply With Quote
Old 18th June 2006, 12:10 PM   #3
diyAudio Member
 
Join Date: Aug 2005
The Aleph-X

Aleph-X builder's thread.
  Reply With Quote
Old 19th June 2006, 04:31 PM   #4
gl is offline gl  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Sierra Foothills - California
Hi lplateaudio,

There is no evidence that Kristian actually prototyped that circuit before he made the layout. Selling boards is how he makes his living. Hopefully some builders will post their experiences with this circuit. Then you will have some hard facts.

The two threads referenced by eapavant are the two reference threads on the Aleph-X. Anyone building an Aleph-X needs to read and understand these threads in order to make any informed design decisions on the circuit. You need to develop your own judgement ability. There is a great deal of information and mis-information on the Aleph-X. In my personnal opinion I suspect that there are issues with Kristians 100W circuit. I emphasize the words "personal opinion" and "suspect".

When I undertook to build a 100W version of the Aleph-X I decided to completely re-read the two main threads and use the information they contain to develop my own cicuit. The resulting amps are documented here:

AX100 100W Aleph-X Monoblocks

Regarding your question about the 625VA transformer; it should probably work OK. Back when the A40 came out the rule of thumb for class A amps was to duoble the idle dissipation wattage to come up with an approximation for the transformer rating. In recent years the popular number has grown to 3 times or even more. If you already have the transformers I'd say go ahead and use them.

Cheers,
Graeme
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Improvements to first GC hotscot Chip Amps 1 26th December 2008 07:09 AM
NAD 302 Improvements ben556473 Solid State 10 7th April 2007 12:14 PM
amp improvements felixx Solid State 0 6th January 2007 07:56 AM


New To Site? Need Help?

All times are GMT. The time now is 01:57 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2