[Elecraft] KXV3B install - no problems

[Joe Subich, W4TV]

I also installed the KXV3B in my K3 s/n 1450 yesterday evening with no
problems - other than of my own doing <G>.  The K3 has a KRX3 and two
of the new synthesizers installed so of course the KRX3 needed to be
removed to gain access to the KIO3 and KXV3.

In removing and reinstalling the KRX3 one of TMP cables between the
KREF3 and one of the synthesizers came lose and I failed to notice it.
After buttoning up the K3 and enabling the KVX3B, I had no receive and
no TX power output.  Removing the top of the rig and resetting the bad
cable fixed the problem.  While I was at it I also reseated all of the
TMP cables to/from the KREF3 and both synthesizers.

The KXV3B went in without a hitch - no problems with pin length or
board height.  I inserted the KXV3B pins all the way into J66 then
allowed the board to rotate toward the back panel and adjusted its
final height as appropriate to align the mounting bushings with the
screw holes and the rear (cover) panel.

Preamp 2 appears to be somewhat more sensitive than the PR6/KXV3 that
was replaced.  A quick test with the XG3 and P3 on six meters shows
the -108 dBm signal to be approximately 42 dB above the noise floor
which would work out to an MDS of better than -150 dBm in a 500 Hz
bandwidth.  This compares to approximately -133 dBm with Preamp 1
and -126 dBm with the preamp off.  Not shabby in the least.


73,

   ... Joe, W4TV


On 2015-06-19 6:04 AM, Barry Simpson wrote:
> I have just completed installing the KXV3B in my K3 s/n 1397. It already
> had a KXV3 in it (and a sub receiver which had to be removed and put back)
> and I am pleased to report that it all went together quite easily.