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Vintage amateur radio is a subset of amateur radio hobby where enthusiasts collect, restore, preserve, build, and operate amateur radio equipment from bygone years, such as those using vacuum tube technology.
The Royal Naval Amateur Radio Society (RNARS) is a specialised group or club for amateur radio operators who have a link with maritime employment, such as members of a navy, merchant marine or similar employment. As such, RNARS has become a de facto international group for such people.
Édouard Belin and his Belinograph. Technologically and commercially, the wirephoto was the successor to Ernest A. Hummel's Telediagraph of 1895, which had transmitted electrically scanned shellac-on-foil originals over a dedicated circuit connecting the New York Herald and the Chicago Times Herald, the St. Louis Republic, the Boston Herald, and the Philadelphia Inquirer.
Check if you can visit other sites with a different browser - If you can go to another site, the problem may be associated the browser you're using. If you don't have another browser, download a supported one for free. 2. Check the physical connection - A loose cable or cord can often be the cause of a connection problem. Make sure everything ...
Graphs illustrating the problem of image response in a superheterodyne. The horizontal axes are frequency and the vertical axes are voltage. Without an adequate RF filter, any radio signal S2 (green) from the antenna at the image frequency is also heterodyned to the IF frequency along with the desired radio signal S1 (blue) at , so they both pass through the IF filter (red).
The "Kerbango Internet Radio" was a product, never released, that would allow users to listen to Internet radio without a computer.[1]An Internet radio device, also called network music player is a hardware device that is capable of receiving and playing streamed media from either Internet radio stations or a home network.
Interference with the meaning of electromagnetic interference, also radio-frequency interference (EMI or RFI) is – according to Article 1.166 of the International Telecommunication Union ' s (ITU) Radio Regulations (RR) [8] – defined as "The effect of unwanted energy due to one or a combination of emissions, radiations, or inductions upon ...
DiscT@2 (read as "disc tattoo") is a method of writing text and graphics to the data side of a CD-R or DVD disc first introduced by Yamaha in 2002. [1] While often compared with the later LabelFlash and LightScribe technologies, which also offered users consumer-grade computerized disc labeling, DiscT@2 is different in that it required no ...