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Questions tagged [jargon]

Questions about acronyms, words, phrases, or other terminology specific to amateur radio.

-1
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0answers
21 views

Could someone help me find more about this radio/alarm clock? [on hold]

FCC ID: AFA9UK2323 Model Number: 564.23230150 Made by Sears??? Takes 9V battery Made in Singapore Main Board number: 4-250TII400 Uses Alarm Clock part MM5456N
0
votes
1answer
51 views

Can someone help record a specific radio signal at a specific time to help solve a radio based puzzle? [closed]

I'm not a radio expert and I've never posted on this forum before. My request might also seem odd but hopefully someone can help me. I am pretty much a total layman on this subject so will probably ...
5
votes
2answers
194 views

I was told to check the cluster. What does that mean and how do I do that?

A comment on this question says to "check the cluster". What does it mean to "check the cluster"? I'm guessing it's a website. I did an internet search and http://www.hamcluster.net/Map.aspx seems to ...
10
votes
1answer
116 views

Is there a special name (and if so what is it) for this flush-style SMA variant?

I have some radios that have a special antenna connector. It looks like an SMA connector, but the dielectric is flush with the end of the connector: rather than recessed the way "normal" SMA ...
0
votes
1answer
688 views

LoRa Radio RFM96/98 SX1276/8 configuration settings for Longest Range

I have a pair of HopeRF LoRa RFM98 Radio Modems(based on Semtech SX1278) and I want to configure them for the longest range possible, without taking care about any second factor like transmission time ...
4
votes
1answer
565 views

Pirate Radio vs Ham Radio

I've recently came across the terms "Pirate Radio" and in the URL of this page, "Ham Radio". What is the difference between these terms? And what is the difference between the transmission of a Pirate ...
4
votes
1answer
467 views

What is a panadapter?

To what does the term "panadapter" refer? (Physical hardware or software?) How did the term "panadapter" originate as related to radios or electronics? How is the term "panadapter" different from ...
6
votes
2answers
439 views

4NEC2 - Radiat-eff. vs. Radiat-power

In the output from 4NEC2 the input power is 100 W. On the left, in blue text, is Radiat-eff. which equals 15.41%. On the right is Radiat-power which equals 94.88 W. I would expect either the first ...
4
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2answers
541 views

How to determine a serial number in cq contest?

What serial number is referred to in a cq contest? How do I determine that serial number?
3
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1answer
3k views

In amateur radio conversation, what does “hihi” mean?

A common phrase/word I've seen used in text and I've heard on air in conversation is "hihi" or "hi-hi". What does this mean and in what contexts is it appropriate to use?
6
votes
2answers
4k views

What is a “calling frequency”?

Doing some study for the ham test, I read a question asking about a certain “national calling frequency”. What is a “calling frequency”? What is meant by “calling” in this instance?
6
votes
3answers
782 views

What is the origin, history behind “Ben's Best Bent Wire”?

Bens Best Bent Wire My uncle, who was a Merchant Marine in WWII used to tell me this. He was a ham, and said it would develop my fist musically. I was a small child at the time, and through his ...
5
votes
2answers
427 views

Antenna length in relation to lambda length

I'm pretty new with antenna stuff. I'm not sure how to understand antenna length in relation to lambda with dipole antennas. If a simple dipole antenna is lambda/4, has it a total length of lambda/2 (...
7
votes
4answers
24k views

What is the difference between channel & frequency & band in RF?

I am reading about wireless networks basics. I found three terms I cannot find exact definition for: channel, frequency band, frequency. Can anyone give exact definitions for them?
4
votes
1answer
142 views

What do hams mean when they refer to “higher bands”

For example, the Ultimate3S kit info page says: Produces 250mW RF output on 30m (lower output on higher bands) Would bands "higher" than 30m mean: bands with higher frequency e.g. 20m/17m/15m? ...
2
votes
1answer
121 views

DAB/DAB+ and AAC-LD/AAC-ELD

Does anyone know the protocol compatibility with regard to DAB and Low Delay AAC codecs? Is AAC-LD data or AAC-ELD data compatible with AAC and AAC+ decoding. Or how likely is it that an AAC/AAC+ ...
5
votes
1answer
224 views

History and significance of term “lid”

What is the history on the term “lid” when referring to a telegrapher’s capability? How did it originate and what is the significance if any of each letter?
4
votes
2answers
2k views

“Repeater” vs. “reflector”

In various topics on repeaters, IRLP, D-Star and EchoLink, I see people refer to these 'nodes' (for lack of a better word) as reflectors. A quick Internet search for these terms comes up with all ...
7
votes
4answers
3k views

What's the difference between “minimum SWR” and “resonance”?

Is the point of minimum SWR equivalent to resonance? Exactly what does resonance mean, anyway?
5
votes
3answers
659 views

Why are Amateur Radio operators so obsessed about and hostile towards violation of the rules? [closed]

Please don't downvote just for the title, I'm not trolling, and honestly looking for an answer. I'm not directly involved with Amateur Radio, but have friends who are. They're always by the book. The ...
5
votes
3answers
7k views

What's the difference between saying “CQ” or “QRZ” in a contest?

I'm listening to (or let's say I'm trying to participate in) a contest (or perhaps Field Day), using SSB. I noticed that a station would, after completing a contact, sometimes say “CQ” and sometimes ...
7
votes
2answers
711 views

What is a fixed digital message forwarding system?

What is a fixed digital message forwarding system? I noticed this on the lower end of the 222MHz allocation in the US but it's not explained on the band chart:
4
votes
1answer
1k views

What is the difference between a scanner and a receiver?

What is the difference between a scanner and a receiver?
3
votes
1answer
154 views

What is radio pollution?

In a slide on calculating link budget, detrimental effects to a link included “Radio pollution (selectivity, blocking, IP3)”. What is radio pollution? Specifically, what are selectivity, blocking, ...
9
votes
1answer
659 views

What does a lightning bolt symbol next to an antenna connector mean?

On the back of my Yaesu FT-897, next to each of the antenna connectors, there are lightning-bolt-ish symbols. What do these mean, and is there something I ought to be doing because of that? I have ...
8
votes
3answers
5k views

What is dBm and why is it used rather than watts?

Reading through an RF power amplifier datasheet, I found the sheet only referenced dBm output power, rather than watts. What is dBm? How do I convert it to watts? Why, or when, would you use dBm to ...
5
votes
1answer
116 views

What is a shallow/deep QSB?

Probably all amateurs recognize QSB as the q-code to represent 'fading'. I recently encountered the terms Shallow QSB Deep QSB A quick google search failed to yield fruit; What do the above terms ...
5
votes
1answer
2k views

What does TX/RX Exchange refer to?

I am using the Aether logging software and it has two fields I do not understand: TX Exchange and RX Exchange. I know TX and RX refer to transmit and receive, but I'm not sure what to populate in ...
8
votes
1answer
3k views

What do the three-letter modulation codes (emission designators) stand for?

I've seen these weird three-letter modulation codes like J3E, A3F, A1A, F3E and so on. Someone even wrote 2K40J3E or 12K5F3E. What do these codes stand for?
22
votes
2answers
2k views

What is a link budget, and how do I make one?

Like the question title says, what is a radio link budget? For what is it useful, and how do I make one?
27
votes
6answers
24k views

Why do hams often conclude messages with “73”?

Looking at amateur radio forums and email threads, oftentimes amateur radio operators will use "73" or "73s" where one might otherwise expect to find "Sincerely" or "Regards". Why?
1
vote
2answers
173 views

What are amateur radio bands? [closed]

I'm new to radio and would like to know what amateur radio bands are. I'm also wondering about the range of these bands/how many there are.
12
votes
2answers
3k views

What does Ham mean?

Amateur radio operators are always referred to as Hams, it's basically the most common term for the hobby, at least around here. Where does the term come from? I heard that it's an acronym for ...
8
votes
1answer
11k views

What do “QRM” and “QSB” refer to?

An answer on Basic QSO format? mentions things like "QRM" and "QSB". What do those terms mean?
9
votes
1answer
145 views

What is Jamboree on the Air (JOTA)?

What does this term mean? I'm not good with radio terms at all, but I was especially curious about this one...