[Elecraft] K3 build: seeking advice re: KRX4 and DVR

[BigAlT]

Two weeks ago I assembled my K3 ( serial 974 ) having waited until I received
both my KRX3 and KDVR3 since I didn't want to have to keep removing and
replacing the front panel to install each of them. I installed the KRX3
auxiliary DSP board on the main DSP board during the initial build as
specified on pages 36 & 37 of the most recent assembly manual. While the K3
assembly manual doesn't make any mention of installing the KDVR3 during the
original build ( hint hint for an errata ) since it mounts on the main DSP
board I also mounted it when I mounted the KRX3 Auxiliary DSP board. 
 The manual says to complete the initial assembly without installing the
KPA3 or KRX3 ( page 61 & 62 ) due to " essential tests and calibration
procedures before the KPA3 module is installed ".
 I therefore completed the initial assembly only installing the KRX3
auxiliary DSP board & the KDVR3 board. I completed the tests and calibration
procedures for the K3 and then installed the KPA3, did it's tests and
calibration and then installed the KRX3. 
 Since you don't need to remove the front panel to install the KRX3 the
installation goes pretty quickly once you assemble the KRX3 shield & install
the KRX3 board inside it.
 While the wait for the KRX3 and then the KDVR3 was some 7 months from the
time I received my KR100 kit I'm glad I waited as I put it together at one
time with the minimal amount of disassembly and therefore the minimum amount
of handling the circuit boards. 
 PS. using a hint mentioned on the reflector, In installing the KPA3 I used
a very small amount of Deoxit to lubricate the connectors on the RF board
before mounting the KPAIO3 board and then lubricated the connectors on the
KPAIO3 board as well before mounting the KPA3 module to the KPAIO3 board.
Using this method both the KPAIO3 board and KPA3 module mounted with very
little effort unlike many of the comments I've read from people who mounted
the KPAIO3 board and KPA3 module Dry. 
 I also did all of the recommended mods before starting assembly.
 I'm glad to say the build went perfectly with no missing parts and
everything works 100%. So for me, waiting until I had everything necessary
to complete the rig with all the options I wanted at one time was worth it.
 Al
 WB6HPF

DOUGLAS ZWIEBEL wrote:
> 
> HI all...
> 
> I am helping a neighbor assemble his K3.  I have put a number of these
> together now, but none with the DVR and/or subRX.
> 
> I think the DVR can go in with the initial build (comments)?
> 
> Do you suggest that the "base" K3 be completed first and then the
> subRX be installed, or should I do it "all at once?"  Maybe the
> official K3 advice is "in the box."  It just arrived at my qth tonight
> and all we did so far was an inventory.
> 
> Thanks!
> de Doug KR2Q
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