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What is the voltage of the transmitter signal for shortwave high frequency transmissions?
Wiki User
∙ 14y ago
The strength of radio transmissions are expressed in "watts of power", not in voltage. Transmission strength might be weak (eg., 20 watts for my small amateur transmitter) or quite strong (eg., 50,000 watts for WSM in Nashville, Tenn.). OK: For there to be "watts of power" there must be voltage and current. Watts are voltage times current. So what is a typical voltage range of an HF transmission? This information would be helpful if one is buying a knife switch to disconnect an antenna from a transmitter. The switches are rated by their voltages. Knowing the voltage range of the signal sent from an HF transmitter would help to know if a given knife switch is capable. In the previous question, I asked specifically if anyone know the voltage. Of course transmissions are expressed in watts. But there is also a voltage range. Sorry for my slow reply -- been on vacation trip. I doubt that the application of ohms law is so simple at radio frequencies. The impedance of a tuned antenna varies along the length of the wire therefore, I would expect that the voltage might also vary. In any case, I would not want to be connecting or disconnecting the antenna while "hot". I would expect there would be a risk of personal injury and damage to the transmitter. When I had an active "ham" rig I would turn off the transmitter and 'only then' switch the antenna to my receiver. Jack
Wiki User
∙ 14y ago
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