Oh, dude, "51's" in Ham Radio lingo refers to a signal report indicating the audio quality is good but not great. It's like saying, "Yeah, your voice is coming through loud and clear, but I've heard better." So, if someone gives you a "51's," it's not exactly a standing ovation, but hey, at least they can hear you without too much static, right?
It is used in ham radio terms as a term for the wife of the ham operator.
Probably from 'Amateur', (Hamateur). In the same way that amateur actors are known as Ham or hammy.
The term 'ham' in ham (or amateur) radio comes from before radio was ever invented; it was used in wire telegraphy to denote an unskilled or inefficient telegraph operator. The original meaning has been completely lost since the term's adoption by amateur radio operators, and no longer implies the operator is an idiot.
Impedance is not unique to ham radio and applies to all electronics. Impedance is a property of electrical circuits that can impede the current from flowing.
You may have a Ham radio antenna anywhere in the US, unless there are restrictions as to its placement, such as in a condo or apartment. If you meant a Ham radio transmitter, then you must have a Ham license to operate it.
You are thinking of a "hamlet" which does mean a small village. But the word "ham" often refers to a food that comes from a pig; or it can be a slang word that means a person who is a show-off and acts in a conceited way; or it can refer to somebody who is involved in the hobby of amateur radio-- such a person is called a "ham radio operator."
There is no scientist named Ham in ham radio. The term was first an insult, like "ham-fisted" (clumsy) or "ham actor" (bad stage actor). Then the radio operators decided to take the name as a source of pride, and found three radio pioneers to say it was named for: The H is for Heinrich Hertz, who did a lot of work with radio frequency energy and for whom the measurement of frequency is named. The A is for Major Edwin Armstrong, who invented frequency modulation. Apparently no one else was available because FM wasn't a popular mode in the amateur service when they borrowed his name. The M is for Guglielmo Marconi, who invented the radio.
Amateur radio, often called ham radio, is both a hobby and a service in which participants, called "hams," use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self-training. But we still don't know the origin of the word HAM.
Bad ham radio. Bad !
Amateur radio, often called ham radio, is both a hobby and a service in which participants, called "hams," use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self-training.[1] Amateur radio operators enjoy personal (and often worldwide) wireless communications with each other and are able to support their communities with emergency and disaster communications if necessary, while increasing their personal knowledge of electronics and radio theory. An estimated six million people throughout the world are regularly involved with amateur radio.[2] The term "amateur" is not a reflection on the skills of the participants, which are often quite advanced; rather, "amateur" indicates that amateur communications are not allowed to be made for commercial or money-making purposes.
This is a ham radio term. When you sign off, you state your call sign and state that you are through transmitting, and then turn off your radio. The term is now more frequently used in business to mean to agree a document, process or policy. The person senior in the work place responsible for the task would be called upon to "sign off a task" (agree its completed to the standard).
mario