[Elecraft] 5 watts to KPA500

[Bill Breeden]

Here are some measurements I made a couple of weeks ago with my FT-817 and KPA500:

Band: FT-817 Out = KPA500 Out

160 Meters: 6.0 Watts = 70 Watts.
80 Meters: 5.8 Watts = 75 Watts.
40 Meters: 5.3 Watts = 75 Watts.
30 Meters: 5.1 Watts = 75 Watts.
20 Meters: 5.1 Watts = 75 Watts.
17 Meters: 5.0 Watts = 80 Watts.
15 Meters: 5.0 Watts = 80 Watts.
12 Meters: 4.9 Watts = 90 Watts.
10 Meters: 4.9 Watts = 100 Watts.
6 Meters: 4.2 Watts = 125 Watts.

The power output from my FT-817 was measured with an Oak Hills Research WM-2 QRP Wattmeter inserted between the FT-817 and the KPA500. The power output from the KPA500 into a MFJ-264 dummy load was measured with the KPA500's internal wattmeter and read from the digital readout on the front panel of the KPA500. All measurements were made with the FT-817 key down in CW mode on a frequency in the CW segment of each band.

I use my KPA500 with my K3, not my FT-817, but an amplifier discussion on the FT-817 group led me to make this test to satisfy my own curiosity.

73,

Bill - NA5DX