[Elecraft] KX3 2m external amplifier

[Mel Farrer]

If anyone needs information on the older KLM/Mirage amplifiers, I have some of the original documentation when I was at KLM/Mirage in the '70/'80 time period. Would be glad to share.

Mel, K6KBEOne of the founders of KLM Electronics


      From: Jim Brown <jim at audiosystemsgroup.com>
 To: elecraft at mailman.qth.net 
 Sent: Friday, July 29, 2016 12:15 PM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:
> Are those capable of linear operation for SSB as the poster asked? The ones
> I had back then were non-linear (class C) strictly for FM/CW only.

CW is 100% modulation of a carrier by a rectangular wave, so the 
harmonics associated with rise and fall times create at least as much 
distortion as SSB. That distortion shows up in the form of clicky 
sidebands. It's quite easy to see these sidebands on a P3. Here's some 
work I did a year or two ago measuring some rigs that were available to me.

http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on 
improvements made by firmware upgrades to the FTDX5000 a year or two ago.

http://k9yc.com/FTDX5000_Report.pdf

73, Jim K9YC

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