[Elecraft] KX3 and digital modes

[WW2R Elecraft]

Following the listed procedure made made my KX3's previously iffy
performance on 6m digimodes acceptable and even just about acceptable for HF
QRSS.

I used the 5th harmonic of my K3's 10MHz GPS locked reference as the
calibration signal

Dave

Ww2r


Message: 14
Date: Mon, 19 Nov 2012 18:13:03 -0800
From: Wayne Burdick <n6kr at elecraft.com>
Subject: [Elecraft] KX3 and digital modes
To: KX3 at yahoogroups.com, Elecraft Reflector <elecraft at mailman.qth.net>
Message-ID: <D032B041-F5E5-4A29-AC91-D7CB210457E2 at elecraft.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

Hi all,

Lance (W7GJ) recently described his efforts to use the KX3 for JT65  
for 6-meter moonbounce. Lance pretty much wrote the book on this  
niche, so it's not surprising that he went to extremes, rolling his  
own heatsink to reduce the RX-TX frequency shift to just a few Hz on 6  
meters. He also used our new temperature-compensation procedure.

I admire Lance's dedication to this pursuit--and put a lot of time in  
on it myself. But I wanted to point out that supplemental heatsinking  
of the KX3 is *not* needed for typical digital-mode operation with the  
KX3. PSK31, RTTY, etc. will all function "out of the box" on the lower  
bands (20 meters is by far the most common band for digital  
communications).

If you want to use JT65 or other extremely narrowband modes, I do  
suggest doing extended VFO temperature compensation. There's a  
procedure for this on our KX3 page, and if you don't have a very  
stable signal source, you can use our new XG50 RF generator.

73,
Wayne
N6KR