[Elecraft] Auto ATU for K3 + Amplifier

[Phil & Debbie Salas]

I've been using a MFJ-994B with my ALS-600 for about two years, and it has 
worked great (used it with my Yaesu MKV).  I've recently upgraded to the 
MFJ-998 because it has a digital readout, and an amplifier bypass feature 
(now using with my K3).  I had modified my ARB-704 with an amp-bypass 
feature, but now with my K3 and this feature built into the MFJ-998, I've 
done away with the ARB-704.  The amp bypass feature is really neat.  The amp 
enable out from the K3 goes to the amp-in RCA jack on the MFJ-998, and the 
amp-out RCA jack on the MFJ-998 then goes to the amplifier.  So when you 
push the button to start tuning on the MFJ-998, it automatically takes the 
amp off-line before tuning starts and then puts it back on-line when tuning 
stops.

I set my K3 to output 10 watts when I push the TUNE button, and I leave my 
MFJ-998 in the auto-tune position (where I set it to automatically retune if 
the SWR is greater than 2:1).  So when I move to an antenna that isn't 
resonant, I press the TUNE button on the K3.  The K3 puts out the 10 watt 
carrier, and the MFJ-998 automatically tunes if the SWR is greater than 2:1. 
It doesn't matter if my ALS-600 is in OPERATE mode or not, as the MFJ-998 
takes it off line during tuning.

I have reviews of both the MFJ-994B and the MFJ-998 on my website at 
www.ad5x.com.

Phil - AD5X