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Questions tagged [radio]

Radio equipment, including antennas, receivers, two-way radio systems, and more.

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what are examples of low-frequency navigation receiver in an aircraft?

AIM 5-3-3 a. states when reports should be made to ATC or FSS. and 5-3-3 a. 1-(a) says "any loss in controlled airspace of VOR, TACAN, ADF, or low-frequency navigation receiver capability" ...
0 votes
1 answer
101 views

Do you have to repeat back ATC taxi instructions while still on the runway [duplicate]

Upon touching down while still rolling, tower gives us taxi instructions back to parking. I understand the need to give instructions on where to exit the runway but I’m wondering if the FULL taxi ...
4 votes
2 answers
756 views

Would I hear the 90Hz and 150Hz signals when tuned to ILS frequencies with a basic handheld radio?

If I were to make a basic handheld radio and set it to listen to any ILS, would I hear the frequencies which tell you whether you're left or right of the center line? On similar note, how come pilots ...
1 vote
1 answer
207 views

What is, precisely, the function of far field monitor in ILS?

For what I have understood, far-field monitor (FFM) is composed by a set of antennas that receive the signal from the localizer, and check its integrity. The checking is made by extracting the DDM ...
0 votes
1 answer
64 views

Multiple COMM types on the same frequency?

In the manual for the Garmin GNC 255 on page 13, it is stated that: When connected to a position source, the nearest station identifier will be shown for the selected frequency. Frequencies with ...
1 vote
2 answers
172 views

COM Transceiver problem and SWR test

I have a VHF COM problem. I have a new composite structure aircraft (a Berkut) with an older VHF transceiver, (a Bendix King KX-155 TSO), that has significantly reduced range in certain situations. ...
1 vote
2 answers
514 views

Can I share ACARS messages online?

ACARS messages are transmitted via radio just like normal ATC communications are. In the UK, for example, it is illegal to listen to and broadcast ATC chatter. Does the same apply to ACARS? If an ...
2 votes
2 answers
184 views

Origins and Efficiency of the Phonetic Alphabet in Aviation

I’m curious about the history and practicality of the phonetic alphabet (Alpha, Bravo, Charlie, Delta, Echo, etc.) used in aviation communication. While I recognise its universal application in ...
1 vote
1 answer
156 views

Position Calls Relative to airport

Hey I’m a new student pilot to just trying to learn some new things here. I’ve been having trouble in recognizing and communicating my position with cardinal points relative to the airport in ...
0 votes
1 answer
112 views

What is the meaning of (HR) (LY) (FOR) in radio phraseology?

Need help! Can’f figure out what’s the meaning of (HR) (LY) (FOR) beside some words from this document: Source.
0 votes
4 answers
349 views

What format is the output from a GA aircraft microphone? WAV? MP3? or some other format

I'm trying to develop a personal weather station observation to a voice output on Unicom when pilot activated. To start, I need to know what format is in the output from a GA aircraft microphone? WAV?...
11 votes
3 answers
4k views

How does the emergency frequency work?

When I'm flying from my airfield, I usually am out of range of the airfield's radio within 50 miles or so, at low altitudes. How does the emergency frequency (121.50) work? Where is the location of ...
19 votes
3 answers
6k views

Do pilots ever talk directly to each other over radio?

Do pilots ever talk directly to other pilots over air band radio, or only to air traffic control?
8 votes
2 answers
1k views

What licenses do I need to transmit on AirBand frequencies?

I am not a pilot, but at my company we are trying to figure out what FCC licenses we need to use to talk to our pilot when we are on the ground and they are flying. My research has led me to mixed ...
4 votes
1 answer
357 views

Is it possible to use Morse code for communication?

Let's say your radio fails, but luckily you brought your keychain Morse code transmitter as a backup! Is there any way to use it? ICAO defines Q-codes for aviation use. Q-codes were initially ...
0 votes
0 answers
222 views

EASA procedures for radio/comm failure under VFR rules

Trying to find the VFR communication failure procedure in EASA, but can't find anything clear enough, maybe someone have a link for clear instructions for that procedure? I want to figure out what ...
0 votes
2 answers
174 views

Do other countries have the no-cell-phones-on-planes rule?

The answers to this question list mobile apps that presumably need Internet and are intended for use on small planes. I assume Cessnas and similar planes don't have satellite internet; how do these ...
8 votes
6 answers
3k views

Is there a solution to radio interference?

I was reading about the Tenerife Disaster and came across what seemed to be the probable cause behind the accident. A simultaneous radio call from the Pan Am crew caused mutual interference on the ...
2 votes
2 answers
2k views

What is the bandwidth of a 1090ES ADS-B signal?

I cannot find an official, trustworthy source on the bandwidth of the 1090 Mode S extended squitter ADS-B signal. It is not even listed in DO-260C standard. I've seen ranges from 50 kHz to 11 MHz (...
0 votes
0 answers
136 views

Why is there a short tone in the ATC recording that cuts the pilot transmission using VOX?

I had an experience of listening to tower-to-pilot conversation and noticed that there was a short tone in the audio stream that suppresses the voice/audio signal and causes muting on the recording. I ...
12 votes
4 answers
11k views

Can normal PC headsets replace 'aviation' headsets?

Aviation headsets have noise reduction and a larger jack (1/4") than most PC headset counterparts (1/8"). But there are many excellent quality PC headsets with sound-proofing materials which ...
3 votes
2 answers
322 views

Do new VHF radios need to be flight tested?

I'm in the process of upgrading all our VHF radios and the local regulator has asked us to follow the guidance/recommendations from ICAO, as we have more or less cancelled many of our local rules. The ...
-4 votes
3 answers
600 views

Can fighter jets still fly with their radios being jammed?

Imagine a scenario, a squadron flies through an area and suddenly their radio is getting jammed. Even when they try to go back, it's still getting jammed. Would something bad happen if they can't ...
3 votes
1 answer
1k views

What types of antennas are used in a Piper Seneca PA34-200?

What types of antenna are used in the Piper Seneca PA34-200 and where are they are located? The manual is not giving the specific answer to the question. Also, what is the frequency range of the ...
7 votes
1 answer
559 views

Which radar altimeters are susceptible to 5G C-band altimeter interference?

There is apparently a great deal of consternation over the pending expansion of 5G The emergency petition claimed that interference from the C-Band "will cause irreparable harm and jeopardize ...
8 votes
2 answers
3k views

Which FCC license do I need to operate an aviation radio on the ground?

I'm in the process of buying a handheld radio as a backup for when I go flying. According to the owner's manual, I'd need a ground station license to operate it when I'm not actually in an airplane, ...
5 votes
1 answer
635 views

What does a DME indicator do in HOLD or RNAV mode?

I found this DME indicator on the Cessna 210. Its mode switch has four positions - NAV1, NAV2, RNAV and HOLD. NAV1 and 2 are clear - it uses the NAV1 and 2 freq respectively. I'm wondering what the ...
2 votes
4 answers
1k views

What to look for when purchasing a headset

I'm currently a student pilot, and I'm starting at an aviation university this fall to major in commercial aviation. Needless to say, I will be flying a lot. I'm looking to upgrade to a nice headset ...
2 votes
1 answer
236 views

What is the Correct Procedure to Test Portable Backup Airband Radio (US)?

I recently obtained a portable air band radio for use as a backup radio in flight. As this is a backup, it isn't much use without being tested. I'm trying to determine the proper way to test the ...
4 votes
2 answers
3k views

How strong would a servo motor need to be to power the control surfaces of a fixed wing ultralight aircraft?

I'm looking to build an ultralight aircraft. The video above shows a good example of how one is controlled with wires or with metal fulcrums/levers, but I am ...
17 votes
1 answer
14k views

What is the night effect?

I read the night effect takes place in radio navigation, especially VOR and NDB. My questions are: What is its nature? Why does it occur? What are the consequences of it?
23 votes
5 answers
10k views

Does ATC hear the same poor audio I hear on LiveATC?

When listening to air traffic control (ATC) communications on something like LiveATC there is a lot of feedback/static that often makes it difficult to hear. Do controllers hear the same feedback and ...
5 votes
2 answers
534 views

How to avoid talking over others when using different send/receive frequencies?

Related to this question about flight services: when I talk to FSS over the generic or the local receive-only frequency while listening to the VOR voice channel, how do I avoid talking over others on ...
11 votes
4 answers
2k views

How would ATC try to establish contact with a VFR craft?

Example: I'm in a 172 tailed N1234A, on a pleasure hop between Hicks Field and Addison, circling around DFW International to the north, flying at 1500ft within DFW's Mode C veil under VFR (so I'm ...
0 votes
1 answer
98 views

Portable radio for cockpit communication [closed]

I am a private pilot based at Van Nuys airport in Los Angeles. Recently due to traffic congestion we have to hold short for extended periods of time, 20-25 minutes. I thought to get a portable radio ...
4 votes
2 answers
2k views

What can cause my radio to transmit nothing but a terrible noise?

I have replaced the noise filter and checked the jacks. It does not matter what headset or jacks are used. I replaced the audio panel and had the radio serviced. When I transmit all I hear is a low ...
3 votes
2 answers
2k views

What is the name or part number of the Bose 'Lemo' aviation headset connector?

In a similar direction to this question, I was wondering if anyone knows the name or part number of the connector commonly featured on Bose aviation headsets such as the A20. It is commonly know as ...
7 votes
1 answer
660 views

Question about congestion of the 1090MHz frequency

I'm no expert so there's likely to be a lot of mistakes in this post. ADS-B - Automatic Dependent Surveillance - Broadcast, (out) transmits (in) receives position data from/to other aircraft and to ...
0 votes
2 answers
249 views

Why does a phone's flight mode also disable FM radio? [closed]

I had two phones being capable of listening to VHF FM radio (in Germany about 90 to 104 MHz). However when turning on flight mode, the radio receiver is also disabled, and I wonder why: Listening to ...
0 votes
0 answers
38 views

Volume differences between intercom and outside communications [duplicate]

While flying I can hear my instructor in my headset talking no problem, but when they (and me) are speaking with ground/tower the volume in my headset is much lower. Is there anyway to increase the ...
0 votes
1 answer
1k views

Where can I listen online to live VOLMET broadcasts?

Are there sites that stream live VOLMET broadcasts? I need to listen to the format but haven't have the time to put together an amateur radio.
2 votes
2 answers
513 views

Do aircraft carry commercial VHF radios?

Years ago, I was working in the bush and we used portable radios on something like 154MHz. When it came time for pickup, we were able to talk to the helicopter pilot on that frequency. Since it's ...
9 votes
1 answer
14k views

What's the meaning of underlined frequency in sectional chart nav aid box?

There is a statement to describe the underlined frequency in legend, it says: Underline indicates no voice on this frequency. What does this mean? We still need to ident the Morse code, doesn't it?...
2 votes
4 answers
500 views

Can ADS-B used for voice communications?

Everyone knows the radio communications doesnt sound great altough they work perfectly. But can the brand new ADS-B communications be used for carrying audio signal? Would it be clearer? The ADS-B ...
4 votes
1 answer
239 views

Just how inaccurate are (Las Vegas) VOR radials?

I was discussing VOR-based navigation with a pilot, and he mentioned that VOR doesn't provide a very high level of integrity and safety (at least, compared to GPS or DME). He explained that the FAA ...
9 votes
2 answers
2k views

How can I find the location and coverage of aviation VHF transmitters?

In the USA, is there a way to find locations of VHF transmitters that are used for air traffic communication, and the frequencies they transmit/receive on? There are some places (Northern Bay Area, CA)...
-2 votes
1 answer
121 views

What are some alternate methods of communication with aircraft (specifically small drones)?

I've been thinking about his alot but I've yet to find an answer. Most of the time drones use radio, wi-fi, GPS and Bluetooth signals to communicate with their controllers but all of these methods ...
8 votes
2 answers
3k views

Is it legal to use a home-made Airband radio receiver in the United States?

I work at a local small airport (very small, if we get more than about 10 or 15 airplanes taking off/landing it's a "busy day") and I mow the runways (we have multiple grass ones). Because of the ...
1 vote
1 answer
5k views

Can I listen to control tower frequencies on a ham radio legally [duplicate]

Is there a frequency I can tune into to listen to airport I’m in Durham by RDU AIRPORT and would like to listen in on a ham radio only legally
15 votes
2 answers
4k views

Do transoceanic airliners monitor marine VHF emergency frequencies?

I know that modern jetliners often have a multitude of radio equipment on board, including VHF, HF, satellite, etc. From what I've read (such as here), it's customary for jetliners to monitor 121.5 ...