Go Back   Home > Forums > > >

Elektor News and offers from Elektor Magazine

Reply
 
Thread Tools
Old 5th October 2020, 05:35 PM   #21
metanastis is offline metanastis  Greece
diyAudio Member
 
Join Date: Dec 2009
Location: Piraeus
Quote:
Originally Posted by HerrFlick View Post
Nice to hear from you -Metanastics- What a pity we live so far from each other. I would like to make a direct compare between your old AXL amplifier
and my upgraded AXL V2 amplifier. I recently made a tiny modification for the ON/OFF switch LED illumination. It was powered by a old fashioned
small powersupply with a 1,8VA transformer and 100mA stablized 12V out. But I realized that it would be more usefull to have a more "intelligence"
one. This signal LED in the ON/OFF switch should go ON when all the four power supply voltages (-38V and + 38V) for the left and right channel are in good
health. If one of them is down the LED signal should be off. So I used a opto-coupler powered by the four amplifier power supply's. It is just a small PCB
which can easily find a place inside the amplifier.
What's your power transformer specifications in secondary volts and current?
  Reply With Quote
Old 5th October 2020, 09:28 PM   #22
Herr Flick is offline Herr Flick  Netherlands
diyAudio Member
 
Join Date: Sep 2010
Location: The Netherlands
It's a Amplimo toroidal transformer 2 x 25V 2,4 A = 120VA
https://www.amplimo.nl/images/downlo...ange/48016.pdf
  Reply With Quote
Old 7th October 2020, 11:39 AM   #23
metanastis is offline metanastis  Greece
diyAudio Member
 
Join Date: Dec 2009
Location: Piraeus
Try the class A operation- 1A current wit no load. You will be amazed by the sonic impression! I work it to its limits with +- 39VDC 5A power supply. My capacitors are 40000Uf/63VDC and i have built 2 separate boxes for power supply and amplifier. Yesterday I finished the 3 pcbs, 2 for the amp and 1 for the DC stabilization. I have ordered my spare parts from mouser and I will start rebuilding the project under the knowledge and experience of today. 15 years ago I came to your country working for a military project of my company( Hellenic Aerospace Industry).I stayed for 1 month in Wintersvijk and I had a really good time with the local fellows.
  Reply With Quote
Old 7th October 2020, 12:47 PM   #24
metanastis is offline metanastis  Greece
diyAudio Member
 
Join Date: Dec 2009
Location: Piraeus
I would appreciate it If you could inform me about the exact dimensions of the old AXL pcb because scanning the image from the magazine is a little bit tricky.
Thanks a lot
  Reply With Quote
Old 8th October 2020, 09:19 AM   #25
metanastis is offline metanastis  Greece
diyAudio Member
 
Join Date: Dec 2009
Location: Piraeus
Quote:
Originally Posted by Herr Flick View Post
It's a Amplimo toroidal transformer 2 x 25V 2,4 A = 120VA
https://www.amplimo.nl/images/downlo...ange/48016.pdf
Try the class A operation- 1A current wit no load. You will be amazed by the sonic impression! I work it to its limits with +- 39VDC 5A power supply. My capacitors are 40000Uf/63VDC and i have built 2 separate boxes for power supply and amplifier. Yesterday I finished the 3 pcbs, 2 for the amp and 1 for the DC stabilization. I have ordered my spare parts from mouser and I will start rebuilding the project under the knowledge and experience of today. 15 years ago I came to your country working for a military project of my company( Hellenic Aerospace Industry).I stayed for 1 month in Wintersvijk and I had a really good time with the local fellows.I would appreciate it If you could inform me about the exact dimensions of the old AXL pcb because scanning the image from the magazine is a little bit tricky.
Thanks a lot
  Reply With Quote
Old 8th October 2020, 12:15 PM   #26
metanastis is offline metanastis  Greece
diyAudio Member
 
Join Date: Dec 2009
Location: Piraeus
Quote:
Originally Posted by HerrFlick View Post
Nice to hear from you -Metanastics- What a pity we live so far from each other. I would like to make a direct compare between your old AXL amplifier
and my upgraded AXL V2 amplifier. I recently made a tiny modification for the ON/OFF switch LED illumination. It was powered by a old fashioned
small powersupply with a 1,8VA transformer and 100mA stablized 12V out. But I realized that it would be more usefull to have a more "intelligence"
one. This signal LED in the ON/OFF switch should go ON when all the four power supply voltages (-38V and + 38V) for the left and right channel are in good
health. If one of them is down the LED signal should be off. So I used a opto-coupler powered by the four amplifier power supply's. It is just a small PCB
which can easily find a place inside the amplifier.
I will give it a try in my new AXL construction-Thanks a lot
  Reply to this post

Reply


Elektor AXL V2 with Lateral MOSFET'sHide this!Advertise here!
Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
How can one tell if it is a lateral MOSFET Arroyo Solid State 4 18th June 2011 12:09 PM
Lateral MOSFET thermal vs others jackinnj Solid State 6 21st March 2009 02:20 PM
Lateral MOSFET torture... megajocke Solid State 11 11th November 2007 08:08 AM
Elektor- MOSFET 'valvesound' amp opinion mikee12345 Solid State 0 7th August 2004 06:53 AM


New To Site? Need Help?

All times are GMT. The time now is 10:20 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki