New answers tagged antenna-theory
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Can an audio amplifier be used to transmit or receive radio signals?
SAQ Grimeton in was built 1922-1924 in Sweden and operates on 17.2 kHz. It still operates occasionally and has been heard all over Europe, and in Canada, USA, Brazil and Alaska. So yes, radio ...
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Can an HT be harmed by transmitting near it with another HT?
The safe answer is it depends, but let's look at it closely.
Typically, frontend amplifiers have a maximum input power (safety/breakdown rating) of about 20dBm. You transmitted at 38.5dBm at a ...
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Can an audio amplifier be used to transmit or receive radio signals?
You can transmit audio this way, but this is not strictly transmitting a radio signal. It works with transformer coupling, as you say; there's no need for the Ground and Antenna symbols on your ...
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Accepted
Can an audio amplifier be used to transmit or receive radio signals?
Short answer: not without a carrier wave:
Transmitting an audio-modulated radio frequency is fairly easy
Receiving that signal to the exclusion of other signals, and driving a speaker with recovered ...
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Exactly why do some SWR meters give a changing reading depending on the length of coax used to connect to an antenna?
Other answers are confused and confusing.
There are some Wheatstone bridge based "SWR" indicators popular among QRP kits. Those are not really SWR meters, but they just measure closeness to ...
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Can an audio amplifier be used to transmit or receive radio signals?
A short answer is not really.
An audio amplifier can respond to frequencies from 20 Hz to 20 kHz and when connected with a speaker, the coil in the speaker resonates as per the output frequency and ...
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