Hot answers tagged

29

None of them. You say you are in the United States. In general, all radio transmissions fall into one of three categories: The operator is allowed to transmit on that frequency (amateur, "business band", aviation, military, etc.) The radio is allowed to transmit on that frequency (CB, FRS, MURS). The transmissions are very low-power ("Part 15": WiFi, ...


23

Bad etiquette and illegal. Bad etiquette because anyone else scanning the repeater will hear your useless silence, and illegal by §97.119: §97.119 Station identification. (a) Each amateur station, except a space station or telecommand station, must transmit its assigned call sign on its transmitting channel at the end of each communication, and at least ...


19

In the United States, Under the Code of Federal Regulations, Title 47, §97.113 "Prohibited transmissions": (a) No amateur station shall transmit (2) Communications for hire or for material compensation, direct or indirect, paid or promised, except as otherwise provided in these rules; (3) Communications in which the station licensee or control ...


18

The GMRS and FRS bands are governed by the FCC and have specific requirements not just for use and power output, but for equipment that is allowed. One of the requirements is that radios used for GMRS service be part 95 certified and FCC certified for GMRS use: §95.129 Station equipment. Every station in a GMRS system must use transmitters the FCC has ...


17

Completely legal. In fact, it's common practice to identify repeaters (both in the amateur service and in public safety/commercial) with exactly this method. That said, you likely won't make many QSOs with it. There aren't many people who would be prepared to immediately respond if they started hearing FM morse on 146.52 (the typical hailing frequency for ...


17

They are legal to use, but only on the amateur bands. (Of course, you'll need to get a license first). There was a lot of debate on whether they were legal, but the FCC finally stated that they were. Thus the older search results you found, such as this one. Since they are not type-accepted, they are not legal to use on other bands such as FRS, GMRS, etc.


16

The ARRL runs a booth at Dayton Hamvention since 2012 where people can submit their HTs to be tested for spectral purity. Over the years 2016-2019, 100% of the Alinco, Icom, Kenwood, and Yaesu HTs they tested were compliant with the standards laid out in Section 97.307. Only 7.5% of the Baofeng HTs they tested were compliant, with 27% being "borderline" (...


15

11(2) The Licensee shall only address Messages to other Amateurs or to the stations of those Amateurs and shall not encrypt these Messages for the purpose of rendering the Message unintelligible to other radio spectrum users. From the terms and conditions spelt out by OFCOM (pdf), the UK communications regulator. Alternately, in the license guidelines: ...


15

20 wpm. §97-119: (b) The call sign must be transmitted with an emission authorized for the transmitting channel in one of the following ways: (1) By a CW emission. When keyed by an automatic device used only for identification, the speed must not exceed 20 words per minute;


13

The issue came up recently when one amateur radio user petitioned the FCC to permit encrypted communications for emergency operations with the primary goal of complying with HIPAA health privacy laws. The ARRL urged the denial of this petition, and the FCC subsequently denied the petition. The major points of the ARRL's arguments were: it is ARRL’s ...


13

As I understand it, it's legal under FCC rules for anyone, licensed or not, to use any frequency or mode of radio communication as necessary in an emergency. This includes, but is not limited to, police/fire/EMS radios, CB, ham (even tuned outside legal ham bands, if the hardware has the capability), using voice in digital-only or CW-only sub-bands, etc. ...


12

Prior to the internet getting a continuous stream of audio from a manned space mission was difficult, even when the mission was overhead, but, of course, due to orbital mechanics it often isn't overhead. Amateur Radio enthusiasts would request and often gain permission to retransmit audio of space flights, and with some coordination and planning you could ...


12

Does mixed-mode operation qualify as a QSO? I'd say absolutely, yes. You're making contact with another amateur radio station on a frequency allocated to amateur radio; in my book, that qualifies as an amateur radio contact or QSO. What is the legal status of such a cross-mode QSO? Assuming that your license allows you to transmit on the frequency and ...


12

I believe you have encountered a Part 15 radio station. United States Code of Federal Regulations, Title 47, Part 15 (47 CFR 15) covers such things as garage door openers and the like. As such, and due to the fact that they are unlicensed by definition, there is no station-identification requirement. Note that this section covers both intentional and ...


12

There are two different "Title 47"s in play here. Title 47 of the US Code, as referred to by rclocher3, contains laws passed by Congress on the subject of telecommunications. Most interesting for our purposes is Chapter 5, Subchapter 1 which establishes the FCC. It sets the compositon and appointment rules of the FCC, regulates how the FCC can spend money ...


12

Your problem is that there's really but one globally usable unlicensed band, and that's the 2.4 GHz band. But that doesn't sound so bad. People think "high frequency = short reach", stemming from the well-known Free-Space Path loss formula $$P_r = P_t \cdot G_t G_r \left( \frac{c_0}{4 \pi fd} \right)^2\text,$$ where the received power $P_r$ falls with the ...


11

If you are in the USA, check § 97.113 Prohibited transmissions of the FCC rules. Specifically, (4) Music using a phone emission except as specifically provided elsewhere in this section; communications intended to facilitate a criminal act; messages encoded for the purpose of obscuring their meaning, except as otherwise provided herein; obscene or ...


11

FCC 97.15(b) provides a limited amount of protection for Amateur Radio Operators who desire to erect antenna structures in the pursuit of their radio activity: Except as otherwise provided herein, a station antenna structure may be erected at heights and dimensions sufficient to accommodate amateur service communications. (State and local regulation of a ...


11

IANAL, but based on my limited knowledge of US amateur radio regulations: Disable all encryption, as encrypted communications are not allowed within the amateur radio service. Yes, WEP counts as encryption, too. So does HTTPS, SSH or SMTP with STARTTLS. One of the few things you can allow is plain-text HTTP. Set the network SSID to your call sign. This ...


11

Line A Part 97.303 section m states: (1) No amateur station shall transmit from north of Line A in the 420–430 MHz segment. See §97.3(a) for the definition of Line A. The definition of Line A in part 97.3(a) is: (29) Line A. Begins at Aberdeen, WA, running by great circle arc to the intersection of 48 deg. N, 120 deg. W, thence along parallel 48 deg. N, ...


11

Were the contacts on the day of a major contest? Chances are that some other station with a callsign close to yours was operating and several operators misread his call as yours. I, too, get the occasional QSL card or eQSL for a time when I wasn't operating (and they are usually during a major contest). Unless you have definitive proof that someone else ...


11

That's a good question---and one that is heavily under debate currently. The FCC originally limited symbol rates as a way of limiting bandwidth for data modes indirectly (it made sense at the time). But now that there are more advanced modulations (like the various forms of phase shift keying) that can exceed the symbol rate limitations in less bandwidth ...


11

The key wording is in 97.9(b) as referenced in 97.119: ...is authorized to exercise the rights and privileges of the higher operator class... and 97.119 says: "When the control operator is a person who is exercising the rights and privileges authorized by §97.9(b)..." So you only need to use the /AE suffix when you are using privileges only available ...


11

The Current FCC Regulations (as of July 2018) Parts 97.305(c) and 97.307(f) regulate digital modes primarily by symbol rate. The table in 97.305(c) maps bands/frequencies to specific symbol rate limitations in 97.307(f) as follows: (2) No non-phone emission shall exceed the bandwidth of a communications quality phone emission of the same modulation type. ...


11

I have done exactly that. I had a US amateur extra class license when I moved to Germany. As a legal resident of Germany, I applied for and received a reciprocal (no test required) German license with the call DJ0IQ. Yes, it was a requested/vanity call sign to match my US call. The good folks at DARC (the German equivalent to ARRL) helped me with that. ...


10

tl;dr: It's legal on any VHF or above frequency where phone modes are permitted. It is not allowed on HF or below, nor where phone modes are not allowed. What you have described is called "Modulated Continuous Wave" (MCW), as defined in the US amateur radio rules under 47 CFR §97.3(c)(4), and would have the emission designator F2A. (The usual CW used on HF ...


10

So as another take on it, you can engage in the thought experiment of "what happens if encryption is legal". Let's say you're a taxi operator and you want to dispatch via radio. Well usually you'd need a commercial license to do this, since amateur radio is strictly non-commercial. But if you can encrypt your traffic, who's to say it's commercial or not? You'...


10

This is indeed in the FCC regulations. In Part 97, section 305 regarding "Authorized Emission Types" there is the following chart which lists two relevant subbands, see in the VHF group the 6m row and the Do ditto right below it: Tracing our way outwards from there, we find: 47 CFR §97.305(c) is the heart of the FCC regulation on which the ARRL legend note ...


10

In the United States, for the most part, all radio transmissions fall into one of three categories: The operator is allowed to transmit on that frequency (amateur, "business band", aviation, military, etc.) The radio is allowed to transmit on that frequency (CB, FRS, MURS). The transmissions are very low-power ("Part 15": WiFi, Bluetooth, lots of other ...


10

I just purchased a UV-5R to hopefully integrate into business class radios my company uses. Unfortunately, this is not likely legal. Business radio is licensed under the FCC's Part 90 rules; those rules include 47 CFR § 90.203 - Certification required: "[…] each transmitter utilized for operation under this part […] must be of a type which has been ...


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