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

[Michael Zolno]

Well I haven't read that, but I'm not surprised, Mr. Bulter's site is a treasure.

Thank you.

Mike

Sent from my iPad

> On Apr 28, 2015, at 7:16 PM, elecraft-request at mailman.qth.net wrote:
> 
> This does not specifically talk about CW, but CW really is AM. The modulating signal is a square wave, modulated at 100%.
> 
> http://users.tpg.com.au/users/ldbutler/Intermodulation.htm
> 
> wunder
> K6WRU
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Apr 27, 2015, at 4:42 PM, Michael Zolno <luv.myipad3 at me.com> wrote:
>> 
>> 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
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to wunder at wunderwood.org
> 
> 
> 
> ------------------------------
> 
> Message: 10
> Date: Mon, 27 Apr 2015 20:01:45 -0400
> From: Michael Zolno <luv.myipad3 at me.com>
> To: Phil Hystad <phystad at mac.com>
> Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] [Was] Amp power per $$ spreadsheet download
>    [Now] CW
> Message-ID: <F633F1ED-2B0E-4267-81FF-9A9B088A14F9 at me.com>
> Content-Type: text/plain; charset=utf-8
> 
> Well that was fast! Thank You Phil!
> 
> I'm not an engineer, or a mathematician, but on the recommendation of someone whom I respect (Phil Anderson, W0XI) during an email chat last year, I've been looking for a bit more of the "behind the scenes" math wise when something interests me.
> 
> My apologies for the OT bandwidth and Thank You.
> 
> All my very best,
> 
> Mike WH6YH 
> 
> Sent from my iPad
> 
>> On Apr 27, 2015, at 7:47 PM, Phil Hystad <phystad at mac.com> wrote:
>> 
>> I am not Jim but if you are asking for the math based reference for square waves?
>> 
>> http://en.wikipedia.org/wiki/Square_wave
>> 
>> 73, phil, K7PEH
>> 
>> 
>>> On Apr 27, 2015, at 4:42 PM, Michael Zolno <luv.myipad3 at me.com> wrote:
>>> 
>>> 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