Have you run a Transmitter Gain Calibration from the K3 Utility
Application? If you do, be sure to use a good dummy load connected
direct to the radio with a known good short coax jumper.
The fact you have 3 different power indicating devices which all
indicate different power values, I'd say you have a problem with your
power measuring system, for starters. Always when measuring power it
is wise to use a known good 50 ohm dummy load. And just because the
label says 50 ohms is no sign it is really 50 ohms. Measure it with an
ohm meter. Power meters are voltage sensing circuits and the R value
affects the voltage. Thus, as examples, 100 watts into 45 ohms is 67.08
volts, 100 watts into 50 ohms is 70.71 volts, and 100 watts into 55 ohms
is 74.16 volts. Even with a 1:1 SWR most antennas have some reactance
and power indications will vary, depending on the complex Z. It is not
reliable to measure power with a reactive load such as an antenna.
Good luck.
73
Bob, K4TAX
On 7/10/2018 9:18 PM, Gary Smith wrote:
Thanks Fred,
Guess I have some issues with my K3s then.
I think it's past warranty at this point.
I'll break out the K3 and try to get it
working in place of the K3s, send the K3s
back for repair and figure how to get WSJT
going with the K3 while 6 is still open.
73,
Gary
KA1J
My K3S shows 100 watts, my Bird 43 with a 100 watt element shows 105
watts, my Daiwa CN-801HP shows 105 watts. All measurements are made
into a known 50 ohm dummy load.
73
Bob, K4TAX
On 7/10/2018 7:03 PM, Gary Smith wrote:
What is the expected output on 6 meters?
The K3 shows 110W
The P3 watt meter says 73.1W
The LP-100A says 60.1W
When I use the internal tuner it never
breaks into the higher power range, it
only outputs at 7 watts tops.
On all the lower bands it puts out 100
reliably.
Thanks & 73,
Gary
KA1J
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