Destroyer x Amplifier...Dx amp...my amplifier - Page 604 - diyAudio
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 26th April 2009, 10:45 PM   #6031
norazmi is offline norazmi  Malaysia
diyAudio Member
 
Join Date: Feb 2008
Default Re: Colector goes to point "A" and Emitter goes to point "C"

Hi DX,

Thanks, Nah... Dont worry DX, trust me. Aha, u guess same point as you show now, and now i`m much confident, look... so thats why i`m asking to make sure before i make myself like pro, so better i`m asking you DX, its ok sometimes i`m looks like hehehe btw because of outside the board then i must be careful and the better thing is ask the owner of the board.

OK.... i`ll put anything LOL near me . Include bullet proof thing

Wish me with luck, i`m sure i`ll build this baby.

can i have 50W rms with 35 0 -35 Vdc at 5 Amp by using 2SA1302 (pnp) and 2SC3281(npn).

Regards.
Azmi


Quote:
Originally posted by destroyer X

Take a look at the schematic...it is all there.

Are you sure you gonna build Norazmi?... it looks you are not too much skilled, as seems to me that you're having problems with some basic things, alike to watch and understand a schematic.

I wish you good luck..but i am afraid you gonna face some problems..well... we have to start with something to produce some smoke.... put a fire extinguisher near you as a safety procedure.

I am glad you have selected my amplifier to start to do those things..but at same time, i am feeling pitty about this amplifier destiny.

ahahahahah!


regards,


Carlos
  Reply With Quote
Old 27th April 2009, 05:31 AM   #6032
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Yes.... 50 watts RMS at 8 ohms and 92 watts RMS at 4 ohms


with very low THD distortion...around 0.03%


If you tollerate more than that distortion level you gonna have even more power..... into 0.2% your power will be bigger.

Do not worry too much with power.... you will see, that after the first moments of happyness testing huge power, alike everybody you gonna set 2 watts each channel,because this is the most confortable level people use to play music into normal appartment or houses where you have 50 square meters living room.

Of course having more power...alike our 100 watts into 4 ohms, will be much better as you gonna have dinamic power to listen undistorted peaks and will be able to manage bad speakers, the ones have no efficiency (there a lot this way).

It is hard to find those transistor (not fake ones) in Brazil....i hope you are lucky..... distortion is sligtly better using them...also i found BC556 better to the input...but carefull using them...because pins are different compared to the 2N5401.

I am using, now a days, BD139 and BD140 as drivers.... they work better...BUT!... they are more sensitive to oscilations than TIP41 and TIP42.

Those oldies TIP41 and TIP42 does not oscilate into Very High Frequencies (VHF.... 30 to 400 Megahertz) because they cannot... they do not operate above...hummm..lets say.... 3 Megahertz...this turns the unit almost imune to Very High Frequency oscilations... they are not the best possible choice to the driver position, but they are the most safe option.

Also 2N5200 and complementary are much less addicted to oscilate.

regards,

Carlos

.................................................. .................................................. ....

The amplifier is able to put out 20 volts RMS....but this depends the supply voltage drop....this happens when the supply is 35 plus 35 volts when the amplifier is draining 2.5 amperes each rail...total of 5 amperes (4 ohms loads....around 92 to 100 watts RMS depending on the distortion level you tollerate).... in the reality, supply use to have voltage drops...if you really want guarantee 50 and 100 watts, you must use 42 plus 42 volts supplies..voltage even dropping you give you the power you need and much more during peaks..... 30 plus 30 volts transformer (AC) will give you that voltage.
  Reply With Quote
Old 27th April 2009, 06:34 AM   #6033
diyAudio Member
 
Greg Erskine's Avatar
 
Join Date: Jan 2002
Location: Sydney/Australia
Here's a picture I took a few minutes ago. I noticed the ones I have posted on Carlos's web site is of the orginal DX before Carlos decided to use the Vbias circuit. It shows the actual Vbias in place on my DX amplifier. Works well.

regards
Greg
Attached Images
File Type: jpg dx amplfier showing vbias #2.jpg (83.8 KB, 598 views)
__________________
Greg Erskine
  Reply With Quote
Old 27th April 2009, 02:41 PM   #6034
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Thank you Greg.. those board you have made are lovely


I am doing some other channels, this one will be low power stereo power amplifier..... i am still building...not checked, not tested..... not even finished.

I have to find two volume potentiometers...i want to have separated volume controls, one to each channel.

regards,

Click the image to open in full size.
  Reply With Quote
Old 28th April 2009, 10:32 AM   #6035
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Dx Amplifiers, a whole DIY line made for you


We don't mind to give you sound stage.... we want to "put you on the stage!"

A complete line of amplifiers tuned by ears... evaluated by listening tests and A to B comparison... inspired into the great performer, the Aksa 55 (without the secrets and sub circuits used that makes the 55 superior).

A complete sensorial experience... a lovely sound amplifier.

Build one and check by yourself.

regards,

Carlos

.................................................. .................................................. ...

The picture is a home made unit...to produce not more than 20 watts each channel..will operate 20 plus 20 volts.

Was total manual work.... pen, rule and hard work...drilled with hand drilling machine...cleaned with steel brush...sanded with sand paper.... solder flux is there to cover defects into the copper lines (etching ancient process) and to give strengh... short circuit will never burn copper lines this way.

.................................................. .................................................. ....




Click the image to open in full size.
  Reply With Quote
Old 28th April 2009, 06:33 PM   #6036
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Do you like audio electronic images?


I love them also, too and either!

regards,

Carlos
http://img518.imageshack.us/gal.php?g=yeahk.jpg
  Reply With Quote
Old 29th April 2009, 04:11 PM   #6037
EMX_125 is offline EMX_125  Philippines
diyAudio Member
 
EMX_125's Avatar
 
Join Date: Jun 2008
Send a message via Yahoo to EMX_125
Default DHR Turbo

Hi... Sir Carlos ( Destroyer X )

DHR Turbo Power Amplifier 6 Pairs Of Power X sistor Can Be
Use A sUbw00fEr?
__________________
EMIX
  Reply With Quote
Old 29th April 2009, 09:24 PM   #6038
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default It was made to reproduce full audio range


of course you can, but you will have to provide an active or passive crossover to use it.

I have not tested..but here you have a suggestion to try..this will work into all amplifiers, not only Dx Amplifiers...this filter (send to ground) high frequencies and also some mid range frequencies (voices)

I think you may waste a very good quality amplifier (DHR Turbo) to reproduce only basses....but..... this is up to you.

Circuit UNtested!

regards,

Carlos

.................................................. .................................................. ....

DHR Turbo thread is herer:

This is the DHR.... Dx High Resolution Turbo
Attached Images
File Type: gif input filter.gif (8.4 KB, 384 views)
  Reply With Quote
Old 30th April 2009, 05:18 AM   #6039
norazmi is offline norazmi  Malaysia
diyAudio Member
 
Join Date: Feb 2008
Default Here is the board DX :D

Hi Dx,

Today i`ve finish manual etch the board, sorry little late making it because i`m working. today i`ve spend time to making DX amp.

here is below, i`ll put all components today and test this baby.

Please check if i`ve any error on the board layout.
Best Regards
Azmi.

Click the image to open in full size.
  Reply With Quote
Old 30th April 2009, 08:19 AM   #6040
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Picture not good enougth to search for errors.


regards,

Carlos

.................................................. .................................................. ....

To allow me to help you, send me 6 Megabytes crispy focus image, without ligth reflections and without angle (perfect 90 degrées up vision, alike aircraft pictures).... picture must use macro function, a very good digital camera with at least 9 Megabytes with perfect exposure..unless i will not be able to help because image turns almost invisible to debugging.

The image must fill the frame entirelly not to loose pixels... no margins or frames around...only board into the image!...cannot shake hands, use a tripot and some ligth... avoid electronic flash...cannot switch it off?..them cover it with black adhesive tape.

panzertoo@yahoo.com
Attached Images
File Type: gif norazmi.gif (66.5 KB, 262 views)
  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



New To Site? Need Help?

All times are GMT. The time now is 05:09 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