Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 Yesterday, 07:47 AM   #1
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Dx Amplifiers, all models will be shown here

All published DIY models posted in this forum, i am collecting data and pictures to post them here as a display to show how we have worked hard inside this forum, for our own pleasure and for the good of our community.

Soon, this thread will be populated with images and list of projects by name for you to use the search button.

regards,

Carlos
__________________
Never mind, be happy!
  Reply With Quote
Old Yesterday, 08:19 AM   #2
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Here you have Uncle Charlie.

Six feet tall.

regards,

Carlos
Attached Images
File Type: jpg Untitled.jpg (213.5 KB, 198 views)
__________________
Never mind, be happy!
  Reply With Quote
Old Yesterday, 08:49 AM   #3
diyAudio Member
 
Join Date: Apr 2013
Can't wait - subscribed :-)
  Reply With Quote
Old Yesterday, 09:36 AM   #4
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Thank you dear Ranchu

It gonna be a display only...threads are already there..posted.

I have made a recall to the most important threads...and today they are in the front page were you can see them...visit and save the links to future use.

regards,

Carlos
__________________
Never mind, be happy!

Last edited by destroyer X; Yesterday at 09:38 AM.
  Reply With Quote
Old Yesterday, 10:12 AM   #5
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default A small list of amplifier made... designed, built and tested

Power and distortion are not that precise..to more precise data then go to the thread..use the forum search button please.

I am in DIY audio since 2004...so... completed 10 years.

The units made outside the DIY world i cannot comment here:

DIY designs, shared into www.diyaudio .com – Solid State and other world foruns

Dx Amplifier – 50/100 - 8/4 ohms
HRII - High Resolution II – 35/70 - 8/4 ohms
Dx Precision 1 – 150/250/400 – 8/4/2 ohms
DHR Turbo – Destroyer High Resolution Turbo – 170/240/450 – 8/4/2 ohms
Trust – 20/40 - 8/4 ohms
Troyan – 200/400/800 - 8/4/2 ohms
Dx Blame ES and Dx Blame ST – 55/120 – 8/4
Dx Blame MKII and Supercharged – power depending the model…. From 50 to 200 watts
Dx Blame MKIII – 150/250/550 - 8/4/2 ohms
Dx Super A – 80/150/270 – 8/4/2 ohms (10%) ….. 60/120/200 (0.001%)
Dx Armagedon – 240/480/780 – 8/4/2 ohms

Conceptual amplifiers:

Dx Triamp
DxDc – Dx disintegrated Circuit
Dx Symphony
Dx Xs – Dx Excess
Dx Semprini
Dx Evolution
Dx Boom

Outside the DIY world

Mako
Dx Tecton
Dx Avenger
Dx5000 – 2.5 Kilowatts per channel, a specially designed top secret SMPS


regards,

Carlos
__________________
Never mind, be happy!
  Reply With Quote
Old Yesterday, 10:57 AM   #6
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default I will remind you something about the Dx Amplifier

It was a kind of design used inside all brands cabinets....all brands, Sansui, Pioneer, Macintosh, Sony, Philips ...all them used...since 1970.

Extremely developed by the best Wide World Ever Born Audio Designer, Mr. Hugh Dean, the one made the Aksa 55, from Aspen Amplifiers, now took the name NAKSA because someone stole his name creating KSA brand name.... the guy that did it was cursed..anything went well in his life..his amplifier have not take off and now a days he is publishing his schematic to see people using his failed job...i do think he deserved the destiny he had.... well done!

Aksa 55 and Lifeforce was an outstanding audio amplifier, deeply tuned, a very high quality High End product sold in kits and latter on assembled inside the enclosure....Hugh was so famous, the unit has so high quality, so highly respectable that people use to fly from USA to invite Hugh to a dinner in Melbourne (Australia) to receive and to pay in cash the previously ordered amplifier.... these guys spent several thousand dollares (air tickets, dinner and general expenses) and i do think, till our days, that was very cheap by the quality applied.

Even Todd Johnson travel to Australia and met Hugh Dean....oh!...i felt so big envy about that.... he cannot believe i became green of envy!

One day, people started to say that Hugh should show a conceptual schematic, removing all sub circuits and tuning that represent the secret of his design and also produce the outstanding sound quality....he made that and i helped him opening the thread and publishing the simplified schematic (Hugh will show you the Aksa 55 schematic!)...i already had my Aksa 55 and i was amazed with the quality...Hugh to me, was and still represent something valuable as a God.

I took to myself the honor to be the first to develop, from that simplified schematic, something to have my name, to share, to help people to understand how it works, to see people have the enjoyment to have their own amplifier and to have the chance, the oportunity to make some modifications their own way..... i have stollen the basic concept from Hugh because already published and already used (the main frame, the skeleton, the topology) by hundreds of factories...but no one could achieve Hugh results due to his research....mine unit had no one of Hugh secrets applied on it, also my unit performance was worse...no one!.. no design secret applied!... mine unit was not made to sell...no unit was sold...was a result of contribution of several forum folks producing layouts and helping me a lot....was the real forum amplifier..the real DIY amplifier... a lot of guys contributed...Klaas Veenstra and many others..all then have posted stuff in the thread.

Hugh continued to explore his design without any harm..the opposite, his name became even more famous as a result of his contribution....his customers are high level skilled audiophiles, all them successful entrepreneurs and professionals in their own area of activity that had not spare time or skills to assemble themselves...so..Hugh did for them.... all these years...he has units spread into the whole world.

I have never sold a single unit of this Dx amplifier...just helped forum folks, year after year, people to assemble...and you will find the thread... "Dx amplifier, my amplifier".. with hundreds of images, pictures, sketches, diagrams, oscillograms and all stuff...also supported by Doctor Greg Erskine that made a site to host Dx amplifiers here:

Greg's Web Site

I do know all secrets..also Greg knows..also all customers from Hugh knows...but we do not have shared, nor used, the ideas from Hugh.

Dx Amplifier is a three stage amplifier, with a differential feeded by a standard (noisy) zener diode referenced supply into the long tail.... it has resistors as colector load into the differential...the VAS (Voltage Amplifier Stage) is feeded by a resistor divisor that constitutes the bootstrap resistors..this is feeding the VAS...the output is a darlington style Emitter Follower with the driver having their emitters floating...very simplified, no output coil, no power emitter resistors.... distortion was 0.023% THD and power 50/100 watts RMS at 8/4 ohms..... bass is loosen, uncontrolled, and this is what people have appreciated, despite not perfect, nice and looooong bass tones.... thread is almost 1 million views!

Well...this was the first one..hundreds built....also in Brazil they were published in the HT forum and several brazilians have built too.

Dx amplifier test video recorded using a point and shoot fujifilm ancient digital camera....camera recording had not made justice to the audio quality of this amplifier:

https://www.youtube.com/watch?v=8xtvwuYmWGQ

Image is from the AKSA 55

regards,

Carlos
Attached Images
File Type: png dx amplifier-dx amplifier schematic-1.png (137.9 KB, 162 views)
File Type: jpg 55modulesmall.jpg (12.9 KB, 156 views)
__________________
Never mind, be happy!

Last edited by destroyer X; Yesterday at 11:24 AM.
  Reply With Quote
Old Yesterday, 12:10 PM   #7
diyAudio Member
 
Join Date: Apr 2013
Wonderful story, Carlos. The original DX Amplifier is high on my "to do list" to build soon. I think the simple circuits like this have a lot to offer. We are expecting our second baby in a few months and I will build this amplifier to put in his or her nursery.
  Reply With Quote
Old Yesterday, 12:12 PM   #8
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default I hope you like it dear Ranchu 32

Best regards,

Carlos
__________________
Never mind, be happy!
  Reply With Quote
Old Yesterday, 01:16 PM   #9
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default The Dx HRII - Dx High Resolution 2

This amplifier, the second made..... after reading of the entire forum..all posts, all threads...since the begining.... readed books of Douglas Self, Duncan and Slone... i felt myself prepared to make something even better.... some kind of "blameless" style amplifier.

Interesting that i have assembled the Blameless...the concept schematic...my god!...was so awfull, so terrible that i gave it a double barreled 12 gauge shot so angry i felt after listening...what a hell awfull sterile sound!...alike food without salt....now a days i feel that i have made some error, because it is not that bad even as original.... some tuning made then it came into the reality as the best audio amplifier i have listened too....i decide to use it as reference and to recalculate it to make it "my way"....some kind of marriage of the Dx Amplifier with the Blameless concept.

My way is to tune the amplifier while listening... using a channel standard and other channel being tweaked..there are some tricks to do that...and i do reserve to myself to keep some small secrets about the method applied.

Resulted very good.... had modifications into the differential load to colectors and an enhanced VAS applied....retuned the bootstrapp and rail regulators introduced...power droped to 35/70 watts RMS due to the line voltage regulators in step down mode, but the sound was an advance compared to the Dx amplifier...less distortion, played louder despite de lower power, more gain, more sensitivity, wider audio bandwidth..... result very good... several guys assembled....search the thread.

Here you have a video, and down a picture and the schematic....details into the thread:

https://www.youtube.com/watch?v=Tg4TM8ru8eo

Greg site has details about it too:

Greg's Web Site

regards,

Carlos
Attached Images
File Type: jpg HRII.jpg (164.2 KB, 129 views)
File Type: jpg HRII - 26.jpg (834.8 KB, 127 views)
__________________
Never mind, be happy!

Last edited by destroyer X; Yesterday at 01:20 PM.
  Reply With Quote
Old Yesterday, 05:01 PM   #10
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
That's a very nice looking pcb by Nordic you have there.
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  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
BiAmp using Dx amplifiers are now ready destroyer X Solid State 18 17th October 2013 07:01 PM
Dx Super A - a module to be coupled to Dx amplifiers destroyer X Solid State 41 28th March 2013 09:53 PM
Tuning the DX Blame amplifiers, for newbies... smartx21 Solid State 3 15th May 2010 04:56 PM
Bi-amplification to Dx Amplifiers, a passive input filter destroyer X Solid State 53 17th July 2009 05:16 PM


New To Site? Need Help?

All times are GMT. The time now is 07:53 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