33 votes

On which of these frequencies can I transmit without a license?

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 ...
  • 23.2k
19 votes
Accepted

Is it legal for a non-profit to use ham radios for emergency purposes?

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 ...
  • 8,942
18 votes

Are Baofeng radios illegal in the U.S?

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 ...
  • 9,552
16 votes
Accepted

Are Baofeng radios illegal in the U.S?

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. ...
  • 7,604
16 votes
Accepted

Hanging a dipole from a tree not code compliant?

225.1 Scope. This article covers requirements for outside branch circuits and feeders run on or between buildings, structures, or poles on the premises; and electrical equipment and wiring for the ...
  • 9,552
15 votes
Accepted

What is the highest US amateur license I can get in one sitting?

Yes, you can take all three exams in sequence at the same session and obtain an Extra class license. (I did and had no trouble.) Doing this, rather than getting a lower license class and upgrading ...
  • 23.2k
13 votes
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FCC tracking of unlicensed FRS/GMRS transmissions

Are there any documented cases of the FCC actually tracking down and harassing/fining/jailing people for illegal FRS/GMRS transmissions of this sort? You can browse the Enforcement Bureau's Field ...
13 votes
Accepted

Resort FM radio station

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, ...
  • 2,051
13 votes
Accepted

Why does ARRL license examination procedure preclude students from discovering what questions they got wrong on licensing tests

Having participated as a volunteer examiner in a few test sessions, I think there are a number of reasons this is the case: We tend to quietly give the pass/fail results — and should offer the number ...
13 votes

Is it legal for a non-profit to use ham radios for emergency purposes?

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, ...
  • 3,901
12 votes
Accepted

Who enacts the FCC's rules and regulations?

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 ...
  • 9,552
11 votes
Accepted

Am I studying obsolete information?

The question pools are available online from NCVEC: 2011 pool 2015 pool I downloaded these and ran them through diff. These are the big changes I noticed: ...
11 votes
Accepted

Are hashes (such as md5) legal in the US

Yes, they are. Generally speaking, authentication is legal, obfuscating is not legal. So you could do a cryptographically signed hash that would be legal in the United States to transmit over Amateur ...
11 votes

How To Join Packet Radio BBS

A summary of requirements: Licensing: Technician - very minimal requirements Equipment: Transceiver, Terminal Node Controller and terminal Transceiver - traditionally a VHF/UHF FM radio Terminal ...
  • 590
11 votes
Accepted

Why does the FCC put restrictions on symbol rates?

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). ...
  • 314
11 votes
Accepted

Is using /AE compulsory?

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 ...
  • 18.2k
11 votes
Accepted

Do FCC regulations limit digital data rate?

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 ...
  • 18.2k
11 votes
Accepted

Is it legal to transmit scrambled or encrypted voice via SSB on ham bands?

In the US, the FCC prohibits this type of operation if the purpose is to obscure the meaning of your transmission. 97.113 Prohibited Transmissions (4) ... messages encoded for the purpose of ...
  • 18.2k
11 votes
Accepted

What happens to your callsign if you migrate?

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 ...
  • 18.2k
11 votes
Accepted

What are the regulation requirements for running a repeater?

The regulations for an amateur radio repeater are fairly minimal. To answer your specific questions: "Does one need a particular license?" Your license must permit transmissions on the repeater ...
  • 276
11 votes
Accepted

Can a ham license be used for a job?

The answer is YES! Nothing in the rules prevents you from using the existence of your license to help you get a job. If you plan on going into a radio/TV/Cable engineering job, a amateur radio ...
  • 256
10 votes
Accepted

Are amateur radio call signs unique among all radio call signs?

In most countries, they are unique. But in the United States, there is an overlap between Aircraft (which are assigned N-numbers based on the "International Radiotelegraph Convention" in Washington ...
10 votes
Accepted

What are the relative bandwidths of the amateur bands?

The usual figure used in this context is, apparently, fractional bandwidth, defined as the bandwidth divided by the center frequency, and therefore having a range of 0 to 2. $$ \text{fractional ...
  • 23.2k
10 votes

What "test transmissions" are allowed above 51MHz?

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 ...
10 votes
Accepted

USA/callsigns: Why is California region 6? And the midwest in regions 7-9?

The origins of the amateur radio call sign districts can be traced to 1912 when the Department of Commerce, Bureau of Navigation created nine radio inspection districts to enforce the 1912 Act to ...
  • 18.2k
10 votes
Accepted

Full UK license visiting US: Can I use frequencies in US but not UK license?

You're correct in your understanding about region: given that you're operating in a part of the US that is in Region 2 (there are a few US overseas territories in Region 3), you need to conform to the ...
  • 9,552
10 votes

How do I legally use a Baofeng UV-5R radio for communication?

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,...
  • 23.2k
10 votes

How to clean up profanity on airwaves

I've heard --from reliable sources-- that about the only thing that can stop that is to make recordings that you can send to the FCC. Include well-thought-out documentation with callsigns, times and ...
  • 7,604
10 votes

Testing blind license applicants

When testing applicants that are vision impaired we use versions of the test that do not include any diagrams. I am a VE and there is a state school for the deaf and blind near us so we have had ...
  • 1,218
10 votes

Would a ham license allow me to use an uncertified radio on other (non-ham) bands I have permission to use?

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 ...

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