Steve Nosko wrote:
I shouldn't, but will. You don't say, but I think you are puzzled by a
decreasing load impedance causing a decrease in collector current. I'd have
to think about it, but I'd first Try modeling that LC filter at resonance to
see if it gives an inverse function like the 1/4 wave line.
A "gut" reaction tells me that a decreasing collector current for *either*
an increased or decreased load Z would not be a surprise...

The output is link coupled through a series 216 nH coil and a 2.1 nF cap
to ground. The load is connected from the coil/cap junction to ground.
It's a Class E/F 40m amp.

Load Drain Current Drain Efficiency Load Power
25 ohms 12.2 amps 82.6% 129 watts
50 ohms 20.1 amps 77.7% 200 watts
100 ohms 33.1 amps 62.3% 264 watts

Can these be thought of as load-pulling data points? Maximum load
power appears to occur when the load is greater than 100 ohms.
--
73, Cecil http://www.qsl.net/w5dxp

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