aircraft radio

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There was a time when I was a kid riding in the back of my dad's Piper Comanche where you could fly all day without talking to a soul. Airports without towers do not have assigned frequencies and pilots are expected to announce them themselves, if at all.

Aircraft Radio

Sometime in the mid 60's when I started learning to fly in the early 90's, things changed. The larger size of the radar led to greater use of VFR flights. Many airports that do not have towers have been assigned special low-season routes and air traffic control systems. And my father's old Narco 360-channel radio was considered obsolete, instead of the need for a 720 radio, which reduced the range from 118.00 to 135.95 MHz (then it was expanded to 760 channels and increased the frequency between 135 35 MHz and 136,060 MHz).

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Even the simplest flights these days seem to involve some kind of radio function, whether it's getting the weather from ATIS or AWOS from the ground, announcing your intentions on the ground without a tower, or simply repositioning your plane on the ground with a tower. . And when the planes are flying close together, communication is important.

Communicating with other pilots on the radio during flight can be confusing. For some long-haul pilots, 122.9 MHz was the air-to-air frequency for connecting round-trip flights or deciding where to fly for lunch. However, since boarding my father's plane, this frequency has been designated as the multicom frequency for communication at airports without towers without Unicom assigned.

From air traffic control to hot air balloons or deicing operations, almost all aviation activities have special flights. Weekend fighters flying warbirds have been communicating on 123.45 for so long that it has been nicknamed "The Fingers" - and although it was designated for use in flight tests and naval communications it has become an unapproved air-to-air frequency. By law, there is only one frequency allowed for air-to-air communication between fixed-wing aircraft: 122.75 MHz. For most commercial helicopters: 123.025 MHz. Gliders and hot air balloons share 123.3 and 123.5 MHz.

The Federal Communications Commission, which oversees aviation, has documented the proper (and legal) use of each of the 760 channels available in the VHF radio band. From air traffic control to hot air balloons or deicing operations, almost all aviation activities have special flights. An official list can be found in FAA Advisory Circular 90-50D. And while there is little reason for pilots to know the frequency distribution, there are times when a little information can go a long way.

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In 2001, Larry Gaines started having production facilities near his home in Northern California to get Bonanzas coming to Oshkosh for EAA AirVenture. With 33 aircraft involved, Gaines required special frequencies and air-to-air communications backups for each of the eight test phases. A single "authorized" frequency was not enough.

"I went through my pilot's guide, and wrote down the frequencies used by every airport within 300 miles. I did the same with the radio stations within 300 miles to find the route and the center frequency," he said.

Gaines understood that while all frequencies in the airband have a specific function, not all frequencies are used in time and place. For example, unless you are flying near the Boeing facility in the Seattle area or another flight test facility, the dozen or so flights reserved for flight testing by the manufacturer may be unused. The same may apply to airshows, which are anonymously labeled "Aviation Support", or frequencies reserved for unicom or future AWOS.

"I have 20 frequencies that are not currently used, I tested them. Then, at the hospital, I reminded everyone that we are using illegal frequencies and told them to go to the backup if they were challenged by anyone," said Gaines.

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Commonly used (but not resolved) frequencies have clever names. Along with "Fingers" there is "Cheap Suit" (129.95) and "Jumbo" (127.47).

Gaines is careful to stress that he's not condoning illegal use of frequencies, but he's just pointing out the lengths he's gone to solve the problem. By law, misuse of licensed frequencies can result in fines of up to $10,000 from the FCC. Usually, if someone criticizes you regularly and apologizes politely and moves to backup, no one will write. If you and your friends use it regularly for search and rescue or firefighting in the air, disaster is with you.

In the end, the airline group can open up if the FCC and the FAA want to install radios with 8.33 kHz channel separation (8.33 kHz spacing has been required in some airspace in Europe since 1999 and will be added to most of Europe in 2018), creating a possible opportunity. 2,280 options available. Until then, it's best to treat the airwaves like an airline: know where you are and what you're doing, be careful and respect others, and have a backup in case things go wrong. We are pleased to announce the GTR 200B, a Bluetooth-enabled radio and intercom designed for experimental and hobbyist aircraft. In addition to automatic noise cancellation, stereo intercoms, warning inputs, standby frequency monitoring and more, Bluetooth connectivity allows pilots to connect a smartphone or tablet, adding more capabilities to the cockpit. In addition, the advanced integration with the G3X Touch offers many features and benefits that further reduce the number of pilots.

"TeamX, our dedicated team of test and construction aircraft, continues to raise the bar with the launch of the GTR 200B, the industry's first intercom and Bluetooth radio," said Carl Wolff, vice president. sales and marketing of the airline.. "Using the successful implementation of the first generation GTR 200, we are excited to bring the GTR 200B to market as the industry standard for radio communications."

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The GTR 200B with Bluetooth combines advanced radio communication and a two-seat intercom feature to ease the pilot's workload. Bluetooth connectivity adds functionality to the cockpit, giving pilots the ability to wirelessly connect a smartphone or tablet to the GTR 200B. Pilots can make phone calls and listen to audio entertainment or call Flight Service to get permission to take off at an uncontrolled airport - all over the radio. The GTR 200B is also equipped with a 3D audio system to provide a unique travel experience. With stereo headphones, the incoming sound is spatially separated to reflect how people adjust speech and conversation by differentiating the sound source from their unique location or seating position on the plane. Using stereo headphones, listen to the 3D audio presentation by visiting this website: http:///3daudio.

The G3X Touch advanced integration sets the GTR 200B apart from other radios on the market. For example, the GTR 200B can receive communications directly from the G3X Touch Flight Display or a compatible handheld device. The airport ID and frequency type are also displayed along with the frequency. For example, "KOSH TWR" is displayed below the frequency of the Oshkosh tower, so it is easy to confirm that the correct frequency is in a fixed or standby position.

The GTR 200B has a bright, sunlight-readable design and intuitive interface that includes shortcuts and easy-to-use control keys. Pilots can program soft keys to provide one-touch access to emergency situations, audio isolation, stored frequency lists, music mute, and more. Movie-style house music adds to the dynamic sound provided by the GTR 200B, allowing pilots to select bass boosts and matching effects including rock, classical and pop. Optionally, pilots can also install switches on the flight controls to perform common functions such as changing the frequency from standby to active without taking their hands off the controls. The GTR 200B also stores 20 recently used frequencies and easily stores 20 pilot frequencies.

The GTR 200B has a compact design (1.35 inches high) so it can accommodate a variety of aircraft panels. The 10 watt power amplifier also supports 14 and 28 volt planes and provides 25 kHz spacing. Stack Exchange is a question and answer site for pilots, mechanics and enthusiasts. It only takes a minute to sign up.

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I have seen a button built into the yoke or attached to the yoke with velcro on older airplanes. However, the other day my mentor was using an old headset that had a push-to-talk button built into the side of the headset. It had no cable included except for the mic/headphone jacks and never touched the PTT button on the yoke to transmit. My question is: how to start the PTT service? Is this done by a load suppressor or something that pollutes the microphone cable, causing radio transmission? I've done some research and looked at various posts about audio panels and nav comms and haven't been able to find an answer. The audio unit used here is the Garmin GMA-430 audio unit shown here:

The standard GA aircraft microphone plug is the PJ-068 plug, which has three electrical connectors (tip, ring, and

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