[Elecraft] Stray RF With KAT100-1

[Unifiedtx@aol.com]

I have replaced the MCU 1.03 with a new 1.04 to get the LEDs to settle down.  
They are still going wild.  Occasionally on voice peaks four or five LEDs 
will light up.  I have tuned the ATU into a 50 ohm dummy load on each band 
using AUTO mode and then put the ATU into SWR(x.x-1) mode preserving the L 
and C settings.  I wanted to see what the KAT100-1 was really doing, so I put 
my Bird 43 wattmeter between ANT 1 output on the KAT100-1 and the input of a 
MFJ 901-B manual antenna tuner.  The MFJ tuner was tuned to 1:1 SWR as 
indicated on the K2/100 readout at 100 watts.  At this point the KAT100-1 
will display only the leftmost green LED. However, when I start talking (SSB 
at 100 watts on 75 meters) the KAT100-1 LEDs start lighting up.  I never know 
how many will light up from transmission to transmission. All the while the 
Bird wattmeter needle is steady at zero in reverse SWR.  I thought MCU v.1.04 
was supposed to take more SWR samples to eliminate the stray RF pickup.  Any 
thoughts on this?  Roy Morris  W4WFB  KAT100-1, K2/100 #2225


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