[Elecraft] K3--Too much ALC creates energy on opposite sideband?

[Edward R Cole]

I assume the measurements with bare K3/K3S were using 100w internal 
amp.  I wonder how the 10w version of these radios Tx IMD perform?

On 6m, I run with the KXPA100 at 11w output (K3 at very low output) 
to drive a 1000w Harris surplus TV linear (which is rated to 1600w 
continuous duty).  1000w limit is due to the 50v-50A PS input 
limit.  On 2m+ I use the 1mw transverter interface output at 28-MHz 
on my K3.  My  2m 1500w and 23cm 600w LDMOS operate on 50v and I load 
to 1-dB output compression point: 2m at 1200w, 23cm at 560w.

Any IMD analysis on the KXPA100?

73, Ed - KL7UW

From: Conrad PA5Y <g0ruz at g0ruz.com>
To: Michael Walker <va3mw at portcredit.net>, "Elecraft at mailman.qth.net"
         <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] K3--Too much ALC creates energy on opposite
         sideband?

I have measured the TX IMD performance of my and 2 other K3S 
transceivers. In my opinion it is not possible to have anything other 
than mediocre TX IMD performance from a K3S or a K3 at ANY power 
level. I am so disappointed with this aspect of the K3S. The  mass 
market and cheap IC-7300 is better, especially on 6m. In all other 
respects I am very impressed with the K3S.


73, Ed - KL7UW
   http://www.kl7uw.com
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