2020年10月9日 · In what seems to be a small revival in shortwave broadcasting, three USA radio amateurs with careers in SWBC & telecom have posed serious concerns... Thread by: W0PV , Jul 9, 2020 , 120 replies, in forum: Amateur Radio News

2018年8月21日 · Tuning around the bands and listening to shortwave stations with a Yaesu FT-991A ("shack-in-a-box") located in Northern California USA. The antenna is an Alpha-Delta DX-EE parallel dipole at 21 feet. KM6NTW , Aug 21, 2018

2020年7月9日 · BY PAUL MCLANE PUBLISHED in Radio World: JULY 8, 2020 Elevation for proposed shortwave towers; see detailed original in the Parable filing. There’s a plan in the works to build a new international shortwave radio station in Illinois, one that would use the Digital Radio Mondiale modulation system.

2023年5月7日 · Internet Archive’s Digital Library of Amateur Radio & Communicationscontinues to expand its collection of online resources about ham radio, shortwave, amateur television, and related communications. The library has grown to more than 75,000 items, with new resources including newsletters, podcasts, and conference presentations.

2021年12月20日 · I have used a low power (cheap) antenna tuner to dramatically reduce the amount of images that are heard on 1960s portable solid state multi-band shortwave receivers, whose front end design often fails to reject intermod and other signals that are far from the frequency being monitored.

2020年11月9日 · Are you new to operating on the shortwave frequencies (or, high-frequencies--HF; 3 MHz to 30 MHz; 80m, 75m, 60m, 40m, 30m, 20m, 17m, 15m, 12m, 10m)? Is the prospect of figuring out a good HF antenna a bit daunting? Here’s a question that might be relevant: Does an amateur radio operator need to design a perfect antenna, in order to get on HF?

2024年6月17日 · This video is a screen and sound capture of my reception of weather charts and images by shortwave radio, from a station in California running about 4 kilowatts of RF power. This HF WEFAX (Weather Facsimile) service is on every day for ship (marine) weather dissemination so that ships out on the ocean can get weather charts and images not by ...

2020年4月12日 · In this episode, Martin M1MRB is joined by Chris Howard M0TCH, Martin Rothwell M0SGL, Ed Durrant DD5LP, Frank Howell K4FMH and Bill Barns N3JIX to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief and this episode’s feature is - Passion of Shortwave Listening with Thomas Witherspoon K4SWL.

2012年5月28日 · China's Secret Shortwave Jamming Project" by Steven Handler (N9ABC) Several years ago a jammer dubbed "Firedrake" became the scourge of the ham bands. Broadcasting it's high pitched loud music on the amateur radio bands worldwide, hams sought to locate the source and silence the broadcasts.

2023年7月12日 · "The ad hoc group 'Shortwave Modernization Coalition' (SMC) petitioned the Federal Communications Commission (FCC) to allow data communications on multiple bands within the HF 2 – 25 MHz range with up to 20 KW, including in bands immediately adjacent to spectrum allocated to the Amateur Radio Service.