Ionovac distortion - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 20th October 2006, 10:37 PM   #1
rdr is offline rdr  United States
diyAudio Member
 
Join Date: Aug 2006
Default Ionovac distortion

How about Russell's site http://www.roger-russell.com/ionovac/ionovac.htm
where he seems to have measured high distortion. I have had a pair for many years and wonder who out there has had experience with them. It now seems to me that I should crossover at over 10 K instead of the 6 K I have been using.
  Reply With Quote
Old 23rd October 2006, 02:29 AM   #2
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
It should be fairly trivial to use a modern FFT computer/soundcard software measurement system to retest. Even one of the inexpensive Behringer or similar measurement mic will likely give useful results.

I'd try it.

Also, it would be useful to know if a higher slope xover reduced the measured IM figures or not. I suspect it would. How much is the question.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 23rd October 2006, 10:13 PM   #3
rdr is offline rdr  United States
diyAudio Member
 
Join Date: Aug 2006
Yes I am about to do some testing. Russell did IM measurements. I am trying to revive an old harmonic distortion meter (Heath IM12). Wonder if TrueRTA will do it? Don't know, jus downloaded the freebie. As early high end systems using the Ionovac did crosover above 10 k I suspect I will find I will also have to.
  Reply With Quote
Old 27th October 2006, 10:11 PM   #4
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Dunno about that software.

Speakerworkshop, iirc has FFT. Or is it Soundworkshop, I forget, it's freeware tho'.
There's lots of them...
Any of these softwares with FFT and preferably MLSSA will do fine at this point to get in the ball park.

Forget the old Heath, imho.

You want far more information that that old box will provide.

You need a decent microphone for measurement.
Linkwitz' site show how to do it on the cheap...

Then, test something other than the ionophone/vac first and get some sort of baseline results... see if ur of the same, greater or less magnitude for distortion, waterfall, and impulse responses... not to mention frequency response.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  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
How to get the less distortion with BJT? dododio Solid State 24 6th September 2008 09:55 AM
Amp Distortion... bhostinsky Solid State 7 17th July 2006 10:05 PM
Non Linear Distortion testing - Harmonic Distortion JMB Multi-Way 0 20th July 2004 02:54 PM
HELP - Hum and distortion rampage101 Chip Amps 6 14th April 2004 11:44 PM
Vg=0 distortion metalincident Tubes / Valves 3 30th August 2003 11:50 PM


New To Site? Need Help?

All times are GMT. The time now is 08:12 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