Twin DN2540 in TubelabSE? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 7th April 2011, 05:36 AM   #1
Green77 is offline Green77  Sweden
diyAudio Member
 
Join Date: May 2007
Location: MJOLBY
Default Twin DN2540 in TubelabSE?

Hello.

Would consult with you about putting twin DN2540 in my TubelabSE.
Is there a noticeable improvement in sound to do so? Or is it
most measurement result which is better?

Could it look like this? And how do you present value of the resistor (180 ohms?)?
Used 250 ohms before but thought 200 ohms sounded better. Have not measured how much mA I run through the
tube Maybe is booming..

Click the image to open in full size.


Sincerely. Daniel
  Reply With Quote
Old 7th April 2011, 06:47 AM   #2
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally Posted by Green77 View Post
Used 250 ohms before but thought 200 ohms sounded better. Have not measured how much mA I run through the
tube

Are you lazy or just stupid? Resistor in second drawing is not in the correct place anyway. How about using a multiturn trim-pot to set the current with some degree of precision like everyone else? If you have any doubts about the presense of such a device in your sound chain you can always replace it with a fixed resistor once you're happy with the operating point.

IME the cascoded CCS does indeed sound better.
  Reply With Quote
Old 7th April 2011, 07:50 AM   #3
diyAudio Member
 
Join Date: Mar 2003
Location: Zürich
Scroll down the page and see how to properly cascode the DN2540s. The author (not me) omits the gate stoppers, I would just use the 1k you are already using. Good luck.
:: View topic - Real World All Tube LCR Phono for MC Without SUT
__________________
my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY!
  Reply With Quote
Old 7th April 2011, 07:51 AM   #4
Green77 is offline Green77  Sweden
diyAudio Member
 
Join Date: May 2007
Location: MJOLBY
Well, it was a bit lazy I will messure it tonight.
I can see now that i draw it wrong.. Is this better?

Click the image to open in full size.

Thanks. //Daniel
  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
DN2540 croccodillo Tubes / Valves 49 7th November 2011 04:00 AM
TubelabSE with DN2540? Green77 Tubelab 2 26th December 2010 09:45 AM
WTB:DN2540 Help!! guglielmope Swap Meet 4 18th December 2009 02:53 PM
dn2540 chip jarthel Parts 1 1st October 2006 01:51 PM
DN2540 N TO-220 Available dshortt9 Parts 0 15th September 2005 04:12 PM


New To Site? Need Help?

All times are GMT. The time now is 07:34 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