[Elecraft] What autotuner to use with KPA500?

[Phil & Debbie Salas]

I've been using a MFJ-998 for about four years - first with an ALS600 and 
now with the KPA500.  The MFJ-998 works very well.  It has an amp-disable 
feature that opens the amp-key line when SWR goes above a pre-set level, or 
when the tuner starts tuning.  I modified my MFJ-998 so that it disables the 
KPA500 via AUX connector pin11, which is even faster than opening the 
amp-disable line.  Info on the MFJ-998 mod is in the "Equipment 
Modifications" section of my website at www.ad5x.com.  I also have a review 
of the MFJ-998 on my webiste.

I have my K3 set for 15 watts TUNE output, and I leave the MFJ-998 in the 
full-auto mode.  So when I change bands or antennas I push TUNE on the K3. 
If the SWR is 2:1 or greater the MFJ-998 disables the amp and tunes, then 
re-enables the amp.  As most of my normal frequencies are already stored in 
memory, the MFJ-998 usually clicks once and it is tuned.  And, of course, if 
I forget to tune first or pick the wrong antenna, the MFJ-998 disables the 
KPA500 as soon as I transmit.

I am looking forward to the KAT500 as I assume it will automatically pick a 
previous memorized tuning solution whne you change bands or frequencies on 
the K3 without having to transmit first.  But in the interim, the MFJ-998 is 
a nice tuner.

Phil  - AD5X