[Elecraft] KX1 Power / Meter

[Jim - W6VAR]

I was just reviewing the power output on my KX1 on various bands and came up
with the following results:

Band	Int Batt	Ext  Bat	Ext w/Tuner	Ext Bat on 40M Doublet	13.8 Volts
20	1.0	3.0	3.0	4.3	3.9
30	1.4	3.9	3.7	1.7	4.6
40	1.5	3.6	3.6	4.7	4.3
80	1.5	3.9	3.7	4.4	4.4


All were into a 50 ohm dummy load except for the 40M ladder line fed doublet
that had a 1:1 balun near the radio. Power readings on a W1 watt meter.

Scenarios:
1. Internal Batteries Energizer Lithium 50 ohm dummy load, tuner bypassed
2. External SLA battery (about 12.5v) 50 ohm dummy load, tuner bypassed
3. Same but with tuner in line
4. External SLA battery with 40M doublet and tuned for a match.
5. 13.8V regulated power supply with 50 ohm dummy load

Initial readings seemed to make sense, but I had the following observations
/ concerns:

1. at 13.8 volts input, the power went over 4 watts on all but 20M, which
was close at 3.9. Is this running too hot and should I reverse the power
output mod or only operate at lower voltages?

2. The power output when the antenna was hooked up went up considerably on
most bands. Why would this happen and should I be concerned?

3. There was a significant difference between the W1 and the KX1 wattmeters
when the antenna was hooked up (several watts), whereas they were within a
few tenths of a watt in the dummy load. Again, anything to worry about? What
could cause this?

Thanks,

Jim - W6VAR

I have performed the modification 

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