Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

thermal condition of headphone class A amp.
thermal condition of headphone class A amp.
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 10th November 2017, 01:08 PM   #1
revenant is offline revenant
diyAudio Member
 
Join Date: Mar 2016
Location: mauritius,indian ocean
Default thermal condition of headphone class A amp.

Hi to u all,
i built a class A amplifier headphone ,a john linsley hood design on veroboard and have noticed that the two transistors on the right channel get hot quickly and after a while the heatsink cannot be touched whereas the left channel transistors remain warm.I have been listening hours of music with this amp and if something was wrong it should have malfunctioned earlier but no the sound is pleasant and clean and listening fatigue comes after really listening for a very long time.Can someone give an explanation for the above.Also JLH used a TL072 as the input device and although it gave good results,i found that an NE5532 was a better replacement as the high frequencies were bettered
Attached Images
File Type: jpg 20171110_163333.jpg (257.5 KB, 28 views)
File Type: jpg 20171110_163343.jpg (969.2 KB, 28 views)
File Type: jpg 20171110_163311.jpg (886.0 KB, 28 views)
  Reply With Quote
Old 10th November 2017, 01:44 PM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
diyAudio Member
 
JonSnell Electronic's Avatar
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
Possibly quiescent current is incorrect, too high or it is oscillating at HF maybe.
__________________
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
  Reply With Quote

Reply


thermal condition of headphone class A amp.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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Biasing/thermal compensation of Thermal Trak transistors Bob Cordell Solid State 161 8th March 2014 09:42 AM
thermal distortion in class T amplifiers memo Class D 3 25th June 2004 09:40 AM
Will a true class B have thermal runaway? azira Solid State 46 31st January 2004 10:57 AM
Thermal design for Class AB amplifiers mbroker Solid State 3 24th September 2002 04:03 AM


New To Site? Need Help?

All times are GMT. The time now is 05:21 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki