short article about operating points - 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 January 2011, 04:31 PM   #1
diyAudio Member
 
Vinylsavor's Avatar
 
Join Date: Feb 2002
Location: Lindau
Default short article about operating points

Hi!

There had been some discussions about operating points lately. I also am often asked about 'best' operating points.

So I wrote a short post about my view on the topic on my blog:

VinylSavor: The search for that 'magical' operating point

Best regards

Thomas
__________________
http://vinylsavor.blogspot.com/
  Reply With Quote
Old 7th January 2011, 07:50 PM   #2
DF96 is online now DF96  England
diyAudio Member
 
Join Date: May 2007
Very sensible. Fussy amps are a sign of poor design, not "fine discrimination" as some seem to claim.
  Reply With Quote
Old 8th January 2011, 12:47 AM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Thomas, nice article on the selection of reasonable operating points and the rationale behind them.

__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 8th January 2011, 01:51 AM   #4
diyAudio Member
 
Join Date: Jun 2004
Location: Indiana
I bookmarked your blog. Very sensible thoughts on gain and headroom there too. I have often thought it rather interesting that we always seem to focus on distortion at wide (maximum) swings. In a sense we are forced into this because of the poor, shall we say, granularity of the plate curves that we have to work with. Where we might typically swing a few tenths of a volt the traces are at one or two volt intervals. If we had detailed curves near our operating points we might see a rather different picture emerge. Having the ability to swing more grid voltage than typical designs allow could provide improved performance just due to the fact that we are swinging very little of the total possible range.

It might be quite interesting to trace our own curves for something like a 6SN7 with grid voltages in say 0.2V steps, assuming we had the setup to do so.
__________________
If We The People refuse to hear the truth we will be ruled by liars.
  Reply With Quote
Old 8th January 2011, 08:41 AM   #5
diyAudio Member
 
Vinylsavor's Avatar
 
Join Date: Feb 2002
Location: Lindau
Hi,

thanks for the kind comments. I'm glad you like my posts. I plan more similar articles about general design philosophies. Planned in the near future are an article about voicing of an amp, component selection and I also plan to write about cable and wire. I guess my views on these topics are quite different from those of most people.

I will also present the first schematics soon. Stay tuned. Don't hesitate to leave a comment on my blog, or ask me here if you have any questions about an article or if you have suggestions for cetain topics which I should cover.

@mashaffer: I actually trace the curves of the tubes I use. This is quite interesting and helps a lot to chosse the right tubes.

Best regards

Thomas
__________________
http://vinylsavor.blogspot.com/
  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
6LW6 operating points AmpKiller66 Tubes / Valves 10 9th December 2014 12:46 PM
6N6P Operating Points Ruach Tubes / Valves 5 11th October 2006 09:43 AM
ECC99 operating points? skyraider Tubes / Valves 6 22nd September 2005 09:13 AM
PX25 operating points bcherry Tubes / Valves 12 28th June 2003 12:24 AM


New To Site? Need Help?

All times are GMT. The time now is 04:44 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