Finally hit a breather in my busy schedule* to spend a little time
with the new 2M transverter module. *Just wound up running a week of
W1AW/KL7 for 2m eme.
My unit was one of the few that had to have the Rx fixed as result of
field testing. Came back in great shape and verified the RF output
to be 3w. I still don't have enough time to make the exhaustive
frequency measurements that I want to evaluate for use with mw
transverters that commonly use 144 as IF, but
...made some local 2m-FM contacts and noticed the receiver audio
seemed "scratchy", sort of like one would see with poor
signals. That got me curious to make some tests with my other 2m-FM
rig and that also seemed off.
At the same time I decided to program the KX3 with the local NOAA Wx
station (162.475) and it was terrible. I switched to my standard
vertical dual-band base station whip and NOAA came at S6 "loud and
clear" -wow! Quick check of the tower-mounted preamp shows its
blown. It reverts to bypass by removing 12v power. BTW the preamp
is connected to a yagi pointed toward Anchorage 70-mi north. The
NOAA station is 20mi south.
But the thing I wanted to say is KX3-2M Rx sensitivity at 162 MHz
appears pretty good! Quick check of 2m Rx sensitivity was made using
my XG3+30 dB step-attenuator and good it was hearing down to -137 dBm
in SSB bandwidth.
Now I am fixing a RFConcepts 2-23 30w linear amp to be driven by the
KX3-2M. This amp is a very nice brick which is small enough to take
on a plane in a briefcase when traveling. Being linear it can be
used on 2m-SSB with the KX3-2M. Check out my new webpage for the 2M module:
http://www.kl7uw.com/KX3-2M.htm
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com
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