Dx Supply, output adjustable, stabilized power supply - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 December 2012, 12:02 PM   #1
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Dx Supply, output adjustable, stabilized power supply

Now in development...one unit (prototype) already assembled and tested, and a pcboard layout starting to be developed.

Juan Vargas and other folks may help producing decent layouts using software.

It uses three output pairs (not shown in the schematic), able to 150 watts each rail (easy), stabilized within 2.5% .

This depends on your transformer power, of course..no magic allowable here, it is an analogue supply.

It was made (the style, the frame, the idea, the topology) down the seventies by Ampex to power 2 inches tape video tape recorders..also used by Sony and others.

A very good, very simple, very reliable supply i am using since the seventies.

I have build several and worked together HAM transceivers sucking 340 watts of power from the mains.... delivering 13.8 volts and 22 amperes in the output with wonderfull regulation to SSB transmitters.

The speed of the reaction into the error amplifier is adjustable by a single electrolitic condenser..you can have it fast or slow decay of voltage...quick reaction or not, depending your use..to class A amplifier you do not need all that quick response as current does not variates too much.. 50 percent to 100 percent only..when other amplifiers goes from 10 percent to 100 percent of consumption.

Many units assembled..never had a single complain..it works, is reliable and you can adjust your output voltage from the zener diode used (usually one third of the output maximum output voltage, to the supply maximum output voltage..in our case is more or less 14 to 43 volts.

You adjust your output using two separated potentiometers..this way you can adjust the output voltage the way you want having two supplies...and you can use one, or other or two of them same time (symetrical)

It saves electrolitic condenser capacity because use a modified (Dx Patent 0000000 registered in the book 0000, page 0000, line 0000) capacitance multiplier.

A video about:

Dx Supply - Home board will be prepared - YouTube

regards,

Carlos
Attached Images
File Type: jpg Dx Adjustable and voltage stabilized power supply.jpg (423.9 KB, 3080 views)
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 15th December 2012, 12:31 PM   #2
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Something more about this supply.

Dx Super A - Dx Voltage regulator - YouTube

Here in portuguese only:

Fonte Dx tá pronta sim - YouTube

regards,

Carlos
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 15th December 2012, 12:44 PM   #3
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default A little bit more comments

I will explain how it works soon.

Now i gonna work to build and test the new pcboard.

Dx Supply more comments - YouTube

regards,

Carlos
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 15th December 2012, 01:08 PM   #4
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default This is very helpfull, for instance

You want to build a Class A power amplifier that needs 22 plus 22 volts DC... and you already have a 56 plus 56V supply, rectified and filtered...then you enter this DC voltage after the rectifiers, into the DC input section, and adjust to the voltage you want.

Much better if you have a power transformer measuring 40 plus 40 volts AC..then you can plug this AC voltage directly into the diodes and will have an adjustable power supply able to go from 15 to almost 56 volts each rail.

You can adjust and ready to go!... so, having such kind of thing you gonna be able to test an amplifier you build, using your laboratory supply, and then you gonna decide if you will buy a dedicated transformer or not...knowing the amplifier deserves that or not.

regards,

Carlos
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM

Last edited by destroyer X; 15th December 2012 at 01:14 PM.
  Reply With Quote
Old 15th December 2012, 07:14 PM   #5
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default I have prepared the second prototype pcboard

This one a reference to Juan prepare the official pcboard layout.

14 cm by 8.5 centimeters are dimensions.

regards,

Carlos
Attached Images
File Type: jpg Pcboard to Dx Supply ready.JPG (796.7 KB, 2779 views)
File Type: jpg Connections and details about transistors.jpg (339.6 KB, 2252 views)
File Type: jpg How to assemble.jpg (953.1 KB, 2139 views)
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 16th December 2012, 06:22 AM   #6
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default If the world does not end on December 21, so next year i will release

The Dx DIY Laboratory Supply.

It will have short circuit protection and adjust to almost zero volts.

Here you see the scratch, or sketch, i will develop starting from this circuit.

Of course will be much more sophisticated..this is only the skeleton, the basic topology, the main idea..to be developed by the "Dx Corporation world audiophile union center laboratories from Brazil headquarters"..... ahahahahaha!

but first hold on that idea to destruct the world...people must try to be better to develop the human race...the way it is going, with selfish and envy..no way to have this world the way it is...will be erase and deleted and will start from the beginning once again alike Noah arc.

21 of december, just in case, i will go to the mountains..will do that 20 of December.... just in case as i said....Maya, Jews and Hindu...all them saying things about that date...well.... i will be 2000 meters above the sea level..... just in case.

No lo credo em bruxas, pero que lay hay ... hay!

I do not believe in ghost, but they exist..for sure they exist!

The ones that are reading uncle charlie maybe can do the same...so..we gonna populate the new world.... Dx Corporation will continue to feed the whole world with nice diy circuits.

regards,

Carlos
Attached Images
File Type: jpg Dx DIY Laboratory Supply.jpg (176.2 KB, 1950 views)
File Type: jpg Serra das Russas.jpg (790.4 KB, 690 views)
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM

Last edited by destroyer X; 16th December 2012 at 06:38 AM.
  Reply With Quote
Old 16th December 2012, 07:09 AM   #7
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default The supply home made pcboard will be assembled

today.

regards,

Carlos
Attached Images
File Type: jpg Dx Supply.jpg (851.9 KB, 479 views)
File Type: jpg Dx Supply pic b.jpg (783.5 KB, 355 views)
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 16th December 2012, 12:22 PM   #8
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Dx Supply - Building

Here you have it.

http://www.youtube.com/watch?v=ZroBZd2AeRk

regards,

Carlos
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 16th December 2012, 04:21 PM   #9
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default It is looking good..considering was etched at home

and painted using nail polish...hehehhehe.... to result pretty was a miracle!

Dx Power Supply - Prototype assembled. - YouTube

It is only a prototype... Juan is making professional look pcboards....already doing it.

regards,

Carlos
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  Reply With Quote
Old 19th December 2012, 01:15 PM   #10
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Juan is preparing the layout

Here you have the first study about.

regards,

Carlos
Attached Images
File Type: jpg Layout da fonte.jpg (124.8 KB, 731 views)
__________________
These words sounds alike English..but they are not.. these are words without meaning, just sounds made by humans; https://www.youtube.com/watch?v=_X_7iMHugXM
  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
Adjustable power supply questions rendisha Parts 28 10th June 2013 09:57 AM
Adjustable High Voltage Power Supply alfa88 Equipment & Tools 7 8th January 2012 11:33 AM
Adjustable Regulated B+ power supply question Captn Dave Power Supplies 9 21st October 2009 05:13 AM
Adjustable regulated power supply Ford_V6 Solid State 2 1st April 2003 05:03 PM
DIY - Adjustable Power Supply Design vinay Pass Labs 7 20th March 2002 05:46 PM


New To Site? Need Help?

All times are GMT. The time now is 12:24 AM.


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