[Elecraft] Cookbook solution to connecting K3, Tokyo HyPwr amp,

[Phil & Debbie Salas]

"The K3 controls the THP amp okay using a cable from ArraySolutions: 
K3-ACCconnector-to-THP.  I want to add an MFJ autotuner because of reflected 
power from the 160- and 80M antennas, and an antenna switch for convenience. 
Will a KRC2 with V1.4 firmware be helpful?  What would the cabling need to 
be?  Tia & 73,  Dave Windisch, W8FGX"

Dave - I use my K3 with a MFJ-998, an ALS-600 and an Ameritron RCS-12 
switch - kind of a similar setup to what you are looking at.  You'll need a 
SVGA splitter cable so you can simultaneously feed the THP amp and the KRC2. 
Make sure you get a cable with all 15 pins connectied through (Array 
Solutions sells one).  The KRC2 will drive remote switches like the Array 
Solutions SixPak or the Ameritron RCS-8 or RCS-10 (I'm only familiar with 
these switches).  The MFJ-998 autotuner has an amp disable feature whereby 
you feed the amp-key output of the K3 through the MFJ-998 and on to the 
amplifier, and so the MFJ-998 will take your amp off-line before it starts 
tuning or if you exceed a pre-set SWR threshold,.  So you'll need a RCA 
cable from the K3 amp-key out to the MFJ-998, and another RCA cable from the 
MFJ-998 to the amp-key input on the THP amp.  The MFJ-998 also puts out a 
ground when it gets ready to tune, which can be used with some transceivers 
to put them into a low power CW tune mode automatically (the K3 doesn't have 
this capability yet - but I THINK it is coming eventually).  I have a review 
of the MFJ-998 on my website (www.ad5x.com).

Phil - AD5X