Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [frequency]

Use this tag for questions about which frequencies to use or not use in certain locations/situations.

130 questions
9
votes
5 answers

Why do Hams refer to bands by wavelength and not frequency?

I've noticed while reading literature and websites geared towards and written by amateurs and ham radio enthiuasts that frequency bands are commonly referred to by wavelength. In professional environments I have been a part of, we always used…
YetAnotherRandomUser
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5
votes
2 answers

What is the frequency range 2300-21950 kHz used for?

I was checking out the gizmo mentioned in this question, and I see that it can receive "shortwave" in the frequency range 2300-21950 kHz. Most times I see "shortwave" mentioned, it's by sales or nontechnical people to describe any number of things.…
YetAnotherRandomUser
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2
votes
1 answer

FM transmitter sending to multiple frequencies

I bought Veronica 1W FM Transmitter online, hooking it up and tuning the radio beside me, I can hear the audio on multiple 'stations' or frequencies. I've tried screwing the vc1 which the seller said changed the frequency, there are in total 4…
wfe34rwfr3w4fr3w4fr3w4fr
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2
votes
2 answers

Mix of Sine waves with different frequencies

What is the mix of a received frequency 27 MHz and a oscillator frequency of 27.001 MHz? I expect the mix of them would be 1 KHz.
Axel H.
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2
votes
3 answers

Is 2.4Ghz good for an UAV?

I'm designing a drone(UAV) as a hobbyist, and radio communications is not my strong point. I will be transmitting waypoints from a portable control station and receiving video(a low frame rate is ok). I'm trying to decide what frequency I should…
Aaron
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2
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1 answer

Is it possible to set a precise frequency with a Btech 50x3 or am I stuck with being off frequency all the time?

I can't seem to figure out how to set it to the simplex frequency, 146.520. Always skips to 146.525 or 146.500.
NonYaBidnezz
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2
votes
2 answers

Full Duplex Radio Communication On a Single Frequency

I am an ELECTRONICS final year student and I am working on a project, "Full Duplex Radio On a Single Frequency". So is it possible to design such a project. If so then give me the idea about it, how can i design such a circuit, what do i need for it…
Waqas Ahmad
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2
votes
1 answer

Two transmitters on same frequency

What are the repercussions of using 2 transmitters on same frequency? Tx are ~50 feet apart and the freq is 447.800 mhz.
John
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1
vote
3 answers

What if all ham/Amateur radio frequencies are occupied, as ham/Amateur radio operators are increasing

What if all ham/Amateur radio frequencies are occupied, as ham/Amateur radio operators are increasing. If one ham radio operator wants to talk to other operator(s), at least one frequescy is needed which is not used by other operator(s). So, I…
ANUPAM
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vote
0 answers

communication with underground mines?

I have a meter that will analyze limited RF spectrum in my area. One frequency that keeps coming up is 2.498 kHz. An FCC site listed that as the frequency used to communicate with underground mines. Is that correct, and if so, why would it be in my…
Vincent Greco
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