KX3 2M Module

[Kevin Luxford]

I ordered the 2 M module for a KX3 with automatic ATU (for the HF bands).
In assembling it into the KX3, I followed all the instructions, ticking
off each item.  Did the set up as in the front of the instruction
manual.  Display shows 2M frequencies when 2M band is selected.  Power
meter shows 3 W output when xmit button pressed. However nothing
received.  Set the XG3 to a 2 M frequency and tuned the KX3 passed that
frequency, but nothing heard.  Also fired up my 2 M rig, but no signal
from that heard.

Not sure where to go next.

Incidentally, the label on the shield was affixed 180 degrees to the
illustration in the instruction manual.  I caught that before powering
the rig.

73
Kevin
VK3DAP / ZL2DAP
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[Edward R Cole]

Kevin,

On some of the early 2M models the printing on the metal shield was
backwards to that shown in the manual.  I made the mistake of
installing my shield per the photo in the manual and got the shield
on backwards which partially shorted the output transistor resulting
in low RF output (0.3w vs 3.0w).  I was one of the field testers so
my unit was very early production.  MY understanding is that the
label issue was remedied in later units.

To be absolutely sure the shield is on correctly you should visually
examine the shield to see if the tiny cutout is over the output
transistor (this is the one with a tab you secured with a black
flat-head screw).  You should be able to check it without  removal of
the shield.  Another way to describe it is the cutout is along the
side of the shield nearest the edge of the radio case.

The manual was updated on this if I am not mistaken (Ron?).

"NOT receiving" is something to call tech support on.  If it
transmits OK, this would indicate to me a problem in the 2M unit.

My receiver lost sensitivity in field testing and was
repaired.  Elecraft added a mod to provide more protection to the
receiver input ckts (which I believe is a permanent mod on later
production units).  I run 1400w on 2m for eme on a tower only
130-feet away from the antennas I use with my KX3, so this puts my
KX3-2M in an extreme RF environment.  I unplug the KX3 antenna when
running eme, now.

73, Ed - KL7UW

snip -------------
Incidentally, the label on the shield was affixed 180 degrees to the
illustration in the instruction manual.  I caught that before powering
the rig.

73
Kevin
VK3DAP / ZL2DAP


73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
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