tube headphone amp - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

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 5th May 2010, 01:14 PM   #1
diyAudio Member
 
Join Date: May 2010
Default tube headphone amp

hi all,
keen looking for a headphone amp for my Beyer DT880/250ohm version,
planning to do it myself..
could 300B/2A3/101 these tube can be use for a headphone amp?
prefer for Single Ended Triode design if got anyone know..

thks in adv
  Reply With Quote
Old 5th May 2010, 10:06 PM   #2
Gordy is offline Gordy  United Kingdom
diyAudio Member
 
Join Date: Nov 2006
Hi drafus77, do you mean design it yourself or assemble it yourself?
  Reply With Quote
Old 6th May 2010, 04:00 PM   #3
diyAudio Member
 
Join Date: May 2010
oo..i wanna assy 1pcs for myself..still in looking for which may suitable for my current DT880 heaphone..
most software listen is audiophile recording,vocal,classical..
prefer higher performance design,or where can i get a orig. Cary 300sei circuit diagram?

thks bro for reply
  Reply With Quote
Old 9th June 2010, 11:31 PM   #4
Gordy is offline Gordy  United Kingdom
diyAudio Member
 
Join Date: Nov 2006
There are some options here...

Cavalli: Cavalli Audio
Millett: Pete Millett's DIY Audio pages
HeadWize: HeadWize Library - Projects
Aikido: John Broskie's Guide to Tube Circuit Analysis & Design (Octal All-in-One LSA/HPA)
  Reply With Quote
Old 20th June 2010, 06:09 AM   #5
diyAudio Member
 
Join Date: Aug 2009
Location: Sacramento
Hello,
You are asking about SET headphone amplifiers. You do not say transformer output or not.
I have been trying several versions of SET headphone amplifiers. I am using an Aikido line stage with up to 20 volts output (more than plenty) to drive the power tube. To start you do not need a high dollar tube or output transformer to work with, after you make refinements you can add more expensive parts.
I have tried 6BX7, you only need one tube with two triodes in the single envelope. Also 12B4A, 6G6G, 45, triode strapped 6L6GC, 5763, and others. They all work. I have 307A to try. The tubes that sound best with HD 600 300Ohm headphones are the tubes with the lowest plate resistance. The 6BX7 and triode strapped 6BQ6GBT I like the best. I have had the 6BQ6GTB running for several months. At this point I am going to move the 6BQ6GTB amplifier off the breadboard into a pretty box. This tube working into this headphone only needs to swing a couple of volts and produce less than 0.1 watt (way less) to cause hearing damage. With little voltage swing or little power needed there is very little distortion. The difficult part was obtaining output transformers made for headphones in the range of 300 ohms. I called Edcor and talked up output transformers. I paid a design fee and they made 5K : 300 ohm 3 watt transformers with a UL tap, model #GXSE-300-5K ~ $20.00 each. The tube idles at 150 volts plate ~22 volts on the grid at 50ma. Sounds very nice The Zo is ~23 ohms. I also had Jack at Eletra-Print make output transformers. The Eletra-Prints sound some better. I think the 50 ma idle current helps get solid output from both transformers.
DT
All Just for fun!

Last edited by DualTriode; 20th June 2010 at 06:12 AM. Reason: typo
  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
Tube Headphone Amp? Dougie085 Headphone Systems 22 3rd November 2007 09:10 AM
Octal tube as headphone amp output tube yagoolar Headphone Systems 6 25th November 2006 09:11 PM
Tube Headphone Amp ! -_nando-_ Headphone Systems 5 3rd April 2006 11:06 PM
My new tube headphone amp MCLL Headphone Systems 7 24th July 2005 08:44 AM
Could this tube be used for a headphone-amp? Mikael Abdellah Headphone Systems 6 22nd May 2003 01:22 AM


New To Site? Need Help?

All times are GMT. The time now is 05:49 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