Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
DIY & Tutorials
DIY For Audio
Intermodulation Question
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Ampdog" data-source="post: 56129" data-attributes="member: 144"><p>Hi Ludo,</p><p></p><p>I am afraid I need to 'go back' on some of my advice, after looking at the analyses of a number of amplifiers reviewed in 'Stereophile', late last night. I was dismayed to notice that some of the secondary IM poroducts were not as low as I assumed. I.e. there were a row of 'organ pipes' as the secondary heterodyning with that 1kHz first product (that is at 1kHz intervals below the 19kHz and similarly above 20kHz). The highest ones were often not much lower than 14dB below the 1 kHz product.</p><p></p><p>Scant encouragement, since you yourself guessed that to view these one would need a quite powerful analyser. In fact, only expensive spectyrum analysers would be capable of rejecting products only 1 kHz away form what one is interested in. You will find some pretty tatty IM graphs in Stereophile under tube amplifiers reviewed.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 56129, member: 144"] Hi Ludo, I am afraid I need to 'go back' on some of my advice, after looking at the analyses of a number of amplifiers reviewed in 'Stereophile', late last night. I was dismayed to notice that some of the secondary IM poroducts were not as low as I assumed. I.e. there were a row of 'organ pipes' as the secondary heterodyning with that 1kHz first product (that is at 1kHz intervals below the 19kHz and similarly above 20kHz). The highest ones were often not much lower than 14dB below the 1 kHz product. Scant encouragement, since you yourself guessed that to view these one would need a quite powerful analyser. In fact, only expensive spectyrum analysers would be capable of rejecting products only 1 kHz away form what one is interested in. You will find some pretty tatty IM graphs in Stereophile under tube amplifiers reviewed. [/QUOTE]
Insert quotes…
Verification
Post reply
DIY & Tutorials
DIY For Audio
Intermodulation Question
Top