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3 votes

What is the output impedance of a typical solid state ham transmitter?

For efficiency the transceiver output impedance is much different from its rated load impedance. For modern 100W TRX expect an output impedance of a very few Ohms. An example: A tranceiver has a ...
Pete Singleton's user avatar
6 votes

What is the apparent AC voltage source caused by a mismatched impedance on the antenna or transmission line?

This would usually take a course in Transmission Line Theory, but we can give you the mechanical solution really quickly. Behold: THE SMITH CHART (in impedance form): Wow. A mandala! A fractal! What ...
Marcus Müller's user avatar
5 votes

Understanding how antenna mismatch can damage a transmitter

There are a few parts to this, it's good to keep them separate. 1. Antenna impedance Antennas are complicated beasts, they connect the circuit world of voltage, current and power, into the ...
tomnexus's user avatar
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2 votes

Understanding how antenna mismatch can damage a transmitter

– let's say we modify the antenna so its radiation resistance is only 15 ohms. Current increases to 330 mA, total power to 10 W, but only 1.7 W is radiated, with remaining 8.3 W lost as heat. I ...
Kevin Reid AG6YO's user avatar
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