Destroyer x Amplifier...Dx amp...my amplifier - Page 206 - 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 1st July 2007, 11:22 PM   #2051
diyAudio Member
 
Join Date: Apr 2007
Default Re: I felt a little bit more controled, the bass, reducing it since the input.

Quote:
Originally posted by destroyer X

Try to install a 82N capacitor into the input.. substituting others that you have there... a single one to block subsonic and attenuate low end

Try to reduce R11 to 33K

Reduce C10 to 100uf

Install 0.47 ohms emitter resistances under the board.... this is the worst modifications i think, because turn the bass more controlable, less loosen but also much less punchy...the thunderstorm punch of the bass is lost in the name of superb fidelity, astonishing quality and impressive capacity to hold instruments producing nice figure at numbers......
...

regards,

Carlos

Hello

I remember Hugh Dean, in a 2004 Aksa thread, say that the 0.47 ohms emitter resistances was for the output to have more linearity.

What do you mean "producing nice figure at numbers" is it the soundstage ?

I do learn a lot in the Dx amp thread.

Gaetan
  Reply With Quote
Old 1st July 2007, 11:24 PM   #2052
ecat is offline ecat  United Kingdom
diyAudio Member
 
ecat's Avatar
 
Join Date: Jun 2007
So close...

If I do any more tonight it's likely that I'll forget to go to bed
Attached Images
File Type: jpg partassembly.jpg (69.6 KB, 319 views)
  Reply With Quote
Old 2nd July 2007, 07:15 AM   #2053
sandyK is offline sandyK  Australia
diyAudio Member
 
Join Date: Apr 2007
Location: Sydney
Default Destroyer X Amplifier

Carlos
You could always compromise with 0R22 instead. A little local NFB can be very beneficial as you mentioned.
SandyK
  Reply With Quote
Old 2nd July 2007, 09:38 AM   #2054
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default It is very impressive how fast you are Ecat..... also Microp is working fast too


I am happy to see you both moving.

Related emitter resistance...the standard Dx amplifier has not those resistances as you know.

About the sonic differences, give a try in your own unit...one channel with emitter resistance and the other using it...and compare.

I think the best way to conclude things is to listen.

regards,

Carlos
__________________
Convertion of 8 speaker output wire into standard 2 wires; https://www.youtube.com/watch?v=toZjKw3uUMo; Unbeatable!; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  Reply With Quote
Old 2nd July 2007, 11:59 AM   #2055
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default I now you have not finished the construction Ecat


But it is not bad to remember folks that a jumper here will be needed.

regards,

Carlos
Attached Images
File Type: gif jumper needed.gif (78.7 KB, 255 views)
__________________
Convertion of 8 speaker output wire into standard 2 wires; https://www.youtube.com/watch?v=toZjKw3uUMo; Unbeatable!; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  Reply With Quote
Old 2nd July 2007, 12:14 PM   #2056
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Hey Ali-X,

why don't you do us a favor, dress up as Eduardo and stroll into the Audiopax building to shop for a single-ended transistor amp some folks would like to peekaboo inside.
You've had a towel around your head, as long as you haul the merchandise you can wear a lady pantyhose for what i care.

(Rua Alvaro Alvim 31/1302, Rio de Janitor)
__________________
The buck stops Here
  Reply With Quote
Old 2nd July 2007, 12:21 PM   #2057
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Transistor position will depend of the unit selected


This image shows the more standard one..... The BC556 and BC557.

regards,

Carlos
Attached Images
File Type: jpg lead position.jpg (77.8 KB, 243 views)
__________________
Convertion of 8 speaker output wire into standard 2 wires; https://www.youtube.com/watch?v=toZjKw3uUMo; Unbeatable!; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  Reply With Quote
Old 2nd July 2007, 12:23 PM   #2058
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Naah Vermeullen


Naah!

I have born in Rio de Janeiro city..... Alvaro Alvim is there!...say...the street.

I am in Recife.... around 2 thousand miles into Northeast direction.... i do not feel we have Alvaro Alvim, Avenue or street, here.

Also i do not understand English very well...decode messages as i cannot read them coded...because poor English reading.

regards,

Carlos
Attached Images
File Type: jpg brasil.jpg (97.6 KB, 222 views)
__________________
Convertion of 8 speaker output wire into standard 2 wires; https://www.youtube.com/watch?v=toZjKw3uUMo; Unbeatable!; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  Reply With Quote
Old 2nd July 2007, 01:08 PM   #2059
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Brasil size is enormous dear Jacco Vermeullen



Brasil área is bigger than Australia.

Some data to you and forum folks.

regards,

Carlos
Attached Images
File Type: jpg we are bigger than australia.jpg (65.4 KB, 218 views)
__________________
Convertion of 8 speaker output wire into standard 2 wires; https://www.youtube.com/watch?v=toZjKw3uUMo; Unbeatable!; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  Reply With Quote
Old 2nd July 2007, 01:17 PM   #2060
ecat is offline ecat  United Kingdom
diyAudio Member
 
ecat's Avatar
 
Join Date: Jun 2007
Default Re: Transistor position will depend of the unit selected

Quote:
Originally posted by destroyer X

But it is not bad to remember folks that a jumper here will be needed.
Indeed, it would by typical of me to forget. From now on I'll fit the jumpers at the start while fitting the resistors

The other component that I would typically get wrong is C12 the 47uf 70v capacitor. I totally missed this when buying parts, luckily the local store had 5 100v parts and I found a 6th in an old TV


Quote:
Originally posted by destroyer X

This image shows the more standard one..... The BC556 and BC557.
This is where the pictures of everyone's boards can become very confusing, I know I've had to check and double check and draw a picture and have a coffee and check again - lol, very confusing. For the record and any passing strangers, I'm using 2N5401 transistors for Q1 and Q2.
  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 05:19 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