[Elecraft] [Was] Amp power per $$ spreadsheet download [Now] CW

Michael Zolno luv.myipad3 at me.com
Mon Apr 27 19:42:46 EDT 2015


Jim,

Can you point to a math based reference for this. I am curious (really). Any other non math based is appreciated as well if not immediately available.

All my best,

Mike WH6YH 

Sent from my iPad

>> On Apr 27, 2015, at 7:51 AM, elecraft-request at mailman.qth.net wrote:
>> 
>> On Sun,4/26/2015 10:33 PM, Vic Rosenthal wrote:
>> Sharpening the envelope is harmonic distortion, not IMD. I think.
> 
> Nope. It's a bunch of square waves, and any square wave is composed of 
> an infinite series of harmonics. Those frequencies are present in the 
> drive signal (from small signal circuits to power amp circuits, whether 
> in the rig or in a power amp), and if either is non-linear, distortion 
> is produced.
> 
> It's important to realize that ANY non-linear element produces both IMD 
> and harmonics -- indeed, in-band IMD is the result of the mixing of 
> harmonics in a non-linear circuit. Quantities like IMD and THD are 
> simply different ways of quantifying the distortion produced by 
> non-linear devices!
> 
> 73, Jim K9YC


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