Engineers too listen to music - Page 3 - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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......

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
Thread Tools Search this Thread
Old 21st August 2006, 02:07 PM   #21
jlsem is offline jlsem  United States
diyAudio Member
jlsem's Avatar
Join Date: Jun 2003
Location: Dallas,TX
Now, will this conclude a DC blocking capacitor disturbes the signal path or more appropiately, the overall system behavior in an unmeasurable way?
Obviously the presence of a capacitor is measureable and so would any dc-blocking device inserted at the input. What is hard to correlate is how the measurements would indicate "good" sound or not. An input transformer may not seem to measure the "best", but many think it sounds better than an input capacitor. I had a friend here in Dallas, he has since passed away, who was a marvelous engineer (worked many years at TI/Raytheon on guided missile systems after an exemplary career in the Air Force) and had a great deal of interest in audio. He designed and tried many audio circuit schematics such as SRPP, mu-follower, long-tailed pair, cathode-follower, etc. He finally told me not long before he had to go into hospice care that, after all was said and done, a triode that was plate-loaded with a choke, transformer primary, or constant-current source sounded best. His name was John Camille and was well-respected as a designer and engineer. One of the things that interested him most was hearing something subtle in a system and then working out a method of measuring what was there.

"Those who abjure violence can do so only because others are committing violence on their behalf." - George Orwell
  Reply With Quote
Old 21st August 2006, 02:24 PM   #22
ingrast is offline ingrast  Uruguay
diyAudio Member
Join Date: Sep 2004
Location: Montevideo
Originally posted by jlsem

Obviously the presence of a capacitor is measureable and so would any dc-blocking device inserted at the input. What is hard to correlate is how the measurements would indicate "good" sound or not. .....

Correct, by I assume the DC blocking capacitor is used just for that, i.e. not only frequency response down to 20 Hz or lower if you want, but phase deviation, are kept close enough to a capacitor less scheme performance.

I may suggest several possible mechanisms why the NS phenomenom occurs - I put my faith in that it really exists - but it should be irresponsible without further knowledge of actual device inner topology and actual operating conditions like when the situation was noticed.

I hope National will find means to make the challenge profitable and demonstrate what is really happening. Otherwise, someone else will do.

For my part I can safely bet my life there is a perfectly measurable performance difference and a perfectly understandable mechanism explaining what happens and why. It may be subtle and complex in the worst case, but it is there.

It will be enlinghtening too. Hope it comes through.

  Reply With Quote


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
Mix engineers not doing their job!! Richard Ellis Multi-Way 35 28th March 2009 02:14 PM
Music to listen to freedom Music 16 20th July 2005 10:49 PM
Unemployed engineers Fred Dieckmann Everything Else 14 13th May 2003 06:59 PM

New To Site? Need Help?

All times are GMT. The time now is 11:37 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2