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radio
Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.
Radio systems need a transmitter to modulate (change) some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation (which can be frequency modulation or phase modulation). Radio systems also need an antenna to convert electric currents into radio waves, and vice versa. An antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected. The electromagnetic wave is intercepted by a tuned receiving antenna. A radio receiver receives its input from an antenna and converts it into a form usable for the consumer, such as sound, pictures, digital data, measurement values, navigational positions, etc. Radio frequencies occupy the range from a 3 kHz to 300 GHz, although commercially important uses of radio use only a small part of this spectrum.
A radio communication system sends signals by radio. The radio equipment involved in communication systems includes a transmitter and a receiver, each having an antenna and appropriate terminal equipment such as a microphone at the transmitter and a loudspeaker at the receiver in the case of a voice-communication system.
I was listening to the radio on my way to work this morning, Armstrong and Getty, I think. One of them starts talking about how a friend took him to the range to shoot the dreaded AR15.
What is it with non-gun people shooting the AR15, and going on about how special it is. I remember some...
Just got an email from Freedom Munitions announcing it is in Chapter 11.
I've been buying both new and remanufactured 9mm and .38 special ammo from them for the past two years. It always goes bang and seems to shoot cleanly. Wonder what happened.
I won't be using them again as I'd hate to...
Gun Talk is on KBNP 1410 AM in Portland 11am to 2pm, Sunday (right now). In Beaverton, reception for 1410 AM seems better in the morning than in the evening.
The Money Station KBNP Oregon's ONLY all-business and financial news radio station 24 hours a day, 7 days a week.
The Money Station KBNP...
I am starting to venture into HAM land. I am currently studying for my technician license but still need my first radio.
Out the gate I was thinking of a nice hand held (e.g. VX-8dr) but then I realized that it would be fairly limited in its use to me. I stepped back and wondered what I would...
I have a like new Icom T70 ham radio, does dual band, only turned it on a couple times. Looking to sell or trade. I have the box, charger, and paperwork.
Paid $229, asking $175obo
Open to trades.
Anyone have any experience with these or similar devices....I have looked up a few companies that do similar...do they work as advertised? Or more like FRS/GMRS radios that promise 25 miles and can only get maybe 2.5 (yes i understand structures, electronic fields, etc).
Beartooth
I'm possibly...
Up for sale is a brand new set of Peltor Lite Com Plus these are rated down to 25 Db and comes with charging adapters as well as a lithium rechargeable battery. Headband and neckstrap adapters are available through the Peltor website. These were designed for a hardhat but work perfectly fine...
Any actual Ham Radio "mechanics" in the fold or somebody who knows one??
Looking to convert a Icom to Part 90 Commercial...
I'v been told 2 diodes make the difference...
Up for grabs - Astron SL-15R Power Supply
12 Amps continuous
15 AMPS ICS @50% Duty Cycle
Used for a very short time, and has sat since. Sold the radio, and don't need this anymore.
Has a set of Anderson Power Poles attached, and I'll include a power cord as well.
$50 OBO - save yourself a...
According to liberal radio talk show host Dave Ross, it was belief in the 2nd Amendment of the US Constitution that was the real motivation for James Hodgkinson to attack the Republicans at their baseball team practice. He portrays Hodgkinson as being a strong believer in the 2nd Amendment...
New in package, Bianchi mod 7923, Size 1, fits Motorola XTS, MTX, Astro and Similar.
$20
Open to trades, what do you got?
FTF at my office in Tigard, or we can meet in Newberg or McMinnville on my commute , shipping can be arranged on your dime and PP Friends and family.
Caught my attention today going home from work early.
I am sitting there and thinking, oh great, were gonna get nuked and I am sitting here stuck in traffic!:eek:
It was a weather alert for the thunderstorms in the Cascades, but it sure got my attention, because until they get into what it is...
If a mega-earthquake or an emergency situation hits, there's a good chance I will be at work while my family is at home. If the disaster is severe enough to take out cell towers and our cell phones are rendered useless, I've been trying to think of the best way to communicate to my wife at home...
So, in addition to a ham ticket, some time ago I acquired a GMRS license. It was mainly "just because", but also it gave us more options. My wife also does not have her amateur license, but she could use GMRS with said license:
"You may apply for a GMRS license if you are 18 years or older...