Questions tagged [radio]

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

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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 ...
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7 votes
1 answer
473 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 ...
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5 votes
1 answer
207 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 ...
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2 votes
1 answer
80 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 ...
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22 votes
5 answers
5k 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 ...
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0 votes
1 answer
79 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 ...
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4 votes
2 answers
991 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 ...
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7 votes
1 answer
438 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 ...
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0 votes
2 answers
136 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 ...
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7 votes
2 answers
871 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, ...
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0 votes
0 answers
36 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 ...
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2 votes
2 answers
203 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 ...
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0 votes
1 answer
630 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.
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  • 305
4 votes
1 answer
207 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 ...
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-2 votes
1 answer
100 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 ...
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1 vote
1 answer
3k 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
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0 votes
1 answer
76 views

Are lhe old King KX170B Nav/Com radios monaural?

If so, does this mean I need to use an adaptor to play the output on stereo headphones? My Stereo-Mono switch does not produce a two-ear audio. Would this be solved with a converter? Would be nice ...
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1 vote
2 answers
455 views

How feasible digital radio communications would be? [closed]

Its been over 100 years since we first flew and we still use analog radio with parasites and "radio effect" which changes your sound. Why don't we ditch the old system and make a mandate a new law ...
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0 votes
4 answers
277 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 ...
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4 votes
1 answer
689 views

Instructor can't talk when H10-13.4 is plugged in

I'm a student pilot and I just bought my first own headset because the standard one in the plane does not really fit me. I got a david clark h10-13.4. My instructor uses either his private Bose A20 ...
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0 votes
0 answers
36 views

What are the procedures for radio malfunction [duplicate]

I was reading this question Do airline pilots ever risk not hearing communication directed to them specifically, from traffic controllers? and there is a answer mentioning radio malfunction If it's ...
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6 votes
2 answers
735 views

Do left and right mic buttons control both headset microphones?

The aircraft I was flying today has a push to talk integrated button on each control yoke. I was sitting in the right seat, but my headset was plugged into the jacks on the left side of the cockpit. ...
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7 votes
2 answers
1k views

How unusual were MH370's final ATC exchanges?

There are 2 noteworthy occurrences in the ATC radio transcript within just minutes of a 3rd noteworthy, quite unprecedented occurrence in aviation history: At 01:07:55 MH370 unnecessarily reported ...
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0 votes
1 answer
88 views

ground staff radio controll [closed]

Hoping someone can help me in understand who is who when using a aviation radio. eg: "Delta Delta, Tac" I understand some of them but am still quite unsure as to who is a sierra, whiskey, alpha etc. ...
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3 votes
1 answer
973 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 ...
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2 votes
1 answer
2k views

Should I monitor the emergency frequency (121.5 Mhz) at all times?

When flying on a plane with two or more radios, should I set the second radio to 121.5 at all times? (Assume I'm not using it to listen on other frequencies) I've heard that sometimes when an ...
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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 ...
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  • 111
1 vote
2 answers
2k views

What requirements do A&Ps (AMT) have to work on avionics?

Is there any additional requirement for A&Ps to work on avionics or is that even a totally different license? I just wonder why only a few A&Ps I met, also do avionics.
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  • 325
2 votes
1 answer
1k views

Why does "airplane mode" turn off Bluetooth and WLAN if I can just turn them on again? [closed]

On my (Android) phone, enabling airplane mode automatically disables all wireless antennas except for GPS and NFC (I assume the latter is either passive or way too low power for anyone to care about). ...
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  • 129
0 votes
2 answers
709 views

Carrier frequency and transmit power of a commercial aircraft

I have a few questions on the radio comms. aspects of commercial aircrafts. At what (central) frequency does an aircraft communicate with a control tower? Is the communication over one frequency only?...
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  • 435
2 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 ...
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0 votes
0 answers
891 views

What is that wire on the picture? [duplicate]

I thought it was HF antenna the What is the purpose of that? What kind of nav aid use HF frequency?
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4 votes
2 answers
2k 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 ...
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5 votes
1 answer
374 views

Did the Westland Lysander have a helmet/face mask for radio communication during WW2?

I have a character in some war-time fiction I'm writing 'acquiring' an aircraft (a Westland Lysander). Just need to know: was there a helmet/face mask for radio communication for these aircraft? And,...
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5 votes
1 answer
664 views

What are the ways to perform air traffic control on long distance flights? [closed]

I have a few questions on air traffic control. From my understanding, there are three major ways of sending control messages to an aircraft: 1) Direct radio link from control as long as the aircraft ...
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6 votes
3 answers
10k views

How many antennae are there on a typical small aircraft, and how are they connected to the avionics?

As far as i know there are a bunch of antennas on board of a small (EASA CS-23) plane: GPS is for GPS navigation in MHz VHFVOR is for NAV and Glideslope/Localizer ADF is for ADF DME is for DME ...
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2 votes
4 answers
2k views

Is there a radio frequency that is sure to be quiet?

When flying in beautiful VFR weather, I often search for a quiet frequency so I don't listen to a lot of chatter. Guard (121.5) sometimes works, but sometimes has "Guard"-ians on it. ("Yer on gaaard")...
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11 votes
4 answers
9k 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 ...
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4 votes
2 answers
2k views

Is there an ATC radio backup?

I was thinking, what would happen if the radio systems for an ATC tower fail due to power loss or faulty systems? Is there any kind of backup radio that would be used to contact the planes and/or ...
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6 votes
3 answers
2k views

Why is radio communication still used?

Why is radio still the method of communication from the ground to air? If i'm not mistaken, cellular services should be much better in quality and reliability
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2 votes
1 answer
109 views

Which authority is responsible for RT licensing in the Netherlands?

Which authority does issue the separate RT license for pilots in the Netherlands? I had a conversation with Netherlands CAA and they could not help me.
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6 votes
2 answers
786 views

What will be in 'radiotelephony privileges' part of EASA PPL without practical RT examination?

My question is addressed to pilots who recently obtained PPL in Europe (preferably in Czech Republic, but not so important). As I understand, EASA itself does not require separate radiotelephony ...
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  • 532
4 votes
0 answers
186 views

Is it normal for airport to transmit unmodulated carrier on its ATIS frequency for extended periods of time?

So I'm around 4 km away from the City-Airport Mannheim (EDFM/MHG). Various websites tell me that its ATIS frequency is 136.550 MHz. When I tune to 136.550 with my VHF AM receiver, I can see a strong ...
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  • 481
6 votes
1 answer
2k views

Is there anything better than LiveATC to get accustomed with RT phraseology?

I would like to "train my ear" for RT communications and I tried to listen to approach of Dublin's Airport. I simply can't understand more than 50% words because of loud background whistle and poor (...
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16 votes
1 answer
12k 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?
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  • 2,751
7 votes
5 answers
2k 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 ...
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  • 878
15 votes
2 answers
3k 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 ...
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  • 685
5 votes
2 answers
7k views

How to check if (small) aircraft's radio is working properly?

Is there a standard way to test/check aircraft's radio without calling anybody (Ground/Tower) to see if it is receiving and transmitting? Is there a way to check aircraft radio with your own ...
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  • 1,947
8 votes
1 answer
10k 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?...
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5 votes
1 answer
1k views

What do the radiation patterns of ADS-B transmissions on large airliners tend to look like?

In the recent article Flightradar24 gears up for a new wave of flight tracking I've read about FR24's experimental Wave Glider ADS-B receiver - essentially a self-propelled, solar power buoy as a ...
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