There is room for doubt here.
An SWR meter assumes the transmitter wants to see a 50 ohm resistive load.
A uBitx/sBitx might work a bit better into a load that is somewhat different than assumed.
Jerry,? KE7ER
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On Wed, Aug 3, 2022 at 06:20 AM, David McGaw wrote:
This is not correct.? The output impedance of the PA does not change the SWR and resistance/reactance of the tuner/antenna combination.
What one is really doing is tuning out the reactance of the antenna and setting the load resistance to the design value of the amplifier.? A reactive load increases the dissipation of the PA finals.? Tuning at low power within the voltage and dissipation limits is safe.
David N1HAC
