K160RX

[Gary Hvizdak]

Today Ken Chandler g0orh wrote ...

Advice needed please.  I have K2 number 5788 (new build) and have half the
RF board completed but no alignment or test in Part II, has been done
yet ... I have K160RX module built and awaiting installation, can I install
the module and ALL it's components, etc, on the RF board without upsetting
the alignment procedures etc, on page 60 of the K2 manual or is it best to
wait until I complete the part 2 alignment or even install when the K2 has
been fully built!!

Ken,

Referring to the annotated schematics at the back of our new Companion Guide
(beta release) at http://www.unpcbs.com/manuals/pdfs/companionguidebeta.pdf,
You can install the three caps RF-C13, C14, and C75 however, you should not
install the K160RX until after completing phase III alignment!  However,
instead of installing soldering RF-W1 onto the RF board, you instead install
RF-J14 and then insert a jumper wire into it to take the place of RF-W1.
HOWEVER, IF YOU DO THIS BE VERY CAREFUL THAT YOU INSTALL THE WIRE IN THE
CORRECT HOLES, OR ELSE YOU WILL LIKELY BLOW YOUR PA TRANSISTORS!!!

A much safer bet would be to instead install the correct un-module header at
RF-J14 in place of the K160RX.  If you were to order today we should be able
to get you our Rework Eliminator(TM) un-module header kit by the weekend.
Otherwise, you might be able to locate someone over there in the UK (via the
Reflector) who could loan you just this board, as several our customer there
have purchased two (or more) of these kits.

If you prefer to insert a jumper wire, PLEASE NOTE that whereas the silk
screen gives the FALSE impression that the RF-W1 connects RF-14-1 and J14-6
IT DOES NOT!  RATHER, (IF YOU'LL REFER TO THE K2 SCHEMATIC YOU'LL SEE THAT)
IT ACTUALLY CONNECTS J14-1 TO J-14-7,8, & 9.  THEREFORE, YOU WOULD BE BEST
OFF BY JUMPERING BETWEEN J14-1 AND J14-8.  This way, if you are off by one
you will still be okay.

If you are wondering why you can safely install the three caps, it's because
they are switched out of the circuit by the firmware.  I recommend you study
the color-coded schematic at the centerfold of our Rework Eliminators(TM)
User's Guide to learn more about un-modules.  You can also find this diagram
on our www.unpcbs.com website, on both our "Frequently Asked Questions" and
"Builder Resources" webpages, with the one on the "Builder Resources" page
having the best technical discussion.

73,
Gary, KI4GGX
K2 #4067

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~ Rework Eliminator, Rework Eliminators, and unpcbs ~~~~~~~~~~~~
~~~~~ are trademarks of Ken Kaplan (WB2ART) and Gary Hvizdak (KI4GGX) ~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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