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

[Michael Zolno]

Please disregard Jim, and Thank You. I'm certain you can easily add to my reading pile, but I gracefully submit to the pile at hand!!!

Many Thanks for the speedy and efficient nature of this list and Thank You to all those responses, public and private.

All my very best,

Mike WH6YH 

Sent from my iPad

> On Apr 27, 2015, at 9:04 PM, Phil Hystad <phystad at mac.com> wrote:
> 
> Michael,
> 
> No problem — I guess I was just reading the messages at the time you posted yours or soon after.
> 
> Math, actually, Mathematical Physics is my number one passion and hobby (yes, I mean hobby).  Ham radio is important to me but it ranks 3rd behind second ranked woodworking (hand joinery projects) and first ranked mathematical physics (QED/QFT and General Relativity).
> 
> 73, phil, K7PEH
> 
> 
>> On Apr 27, 2015, at 5:01 PM, Michael Zolno <luv.myipad3 at me.com> wrote:
>> 
>> 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
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>