A matched conditon does NOT prevent the components of the tuner from seeing high voltages and/or high currents. Check out TLW ... the transmission line application that comes free with the ARRL Antenna Book. Pick a load that gives a high SWR and then click on the "Tuner" button for the application to draw one of four different tuner configurations for you. The app will tell you what the voltages across each component are, and also the power loss (i.e., heating effects) in each one.
73, Dave AB7E On 12/12/2020 8:18 PM, Walter Underwood wrote:
Tuning happens at low power, so transients are small. After it is matched, why would the K3 ATU not be rated for full power over the full SWR range? Other components might fail, of course. Amphenol UHF connectors are only rated for 500 V. wunder K6WRU Walter Underwood CM87wj
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