High frequecy and VHF radio propagation data, solar and geomagnetic real-time and historic data, sunspot activity reports, as well as forecasts. A comprehensive propagation resource compiled by Tomas Hood, editor of the propagation columns of CQ, CQ VHF, Popular Communications, and Monitoring Times magazines.
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Technical Reference/Morse KeysOH7SV five cent morse key
Antennas/BalunsThis article reviews the proposition that a 4:1 current balun in the style of Guanella can be constructed with both pairs of windings sharing a common magnetic circuit.
Antennas/VerticalThis article explores the performance of an unloaded vertical as a multi-band HF antenna.
Operating Modes/QRP/ClubsThe New England QRP Club is where “The excitement is building….”
Technical Reference/Radio Programming CableThis article describes a generalised unit for interfacing a transceiver’s TTL/CMOS interface to RS-232.
Software/Circuit DesignNFM (for Noise Figure Meter) is a software application to assist Noise Figure measurement. NFM implements the method of Agilent application notes AN 57-1 and AN 57-2 for noise figure measurement, but with the addition of an adjustable attenuator after the noise source and between the DUT and instrument.
Internet and Radio/Online ReceiversLive streaming audio of VHF marine radio channels 05A, 16, and 22A from Manasquan, NJ.
Radio Equipment/HF Transceivers/Yaesu FT-857OD Repainting the Yaesu 857D Ham Radio, rapid deploy amateur radio station n0eq
In a posting on January 28 to the FCC’s blog, Mindel DeLaTorre — the Commission’s International Bureau Chief — noted how Amateur Radio operators are assisting with communications support in earthquake ravaged Haiti. “The amateur radio community is also contributing to the relief efforts,” she wrote. “In the aftermath of the earthquake, the amateur radio [...]
Harry Dannals, W2HD — who led the ARRL as President from 1972-1982 and was named ARRL President Emeritus in 1984 — has been named President Emeritus of the Quarter Century Wireless Association (QCWA). Dannals also served as President of QCWA from 1989-1994; he is the only person to ever serve as President to both organizations. [...]
We’ve seen average daily sunspot numbers for this reporting week. Since last Thursday through Wednesday this week, the numbers rose more than 9 points to 28; the average solar flux slipped more than 2 points to 81.9. Geomagnetic indices were a tiny bit lower. Sunspot numbers for January 21-27 were 17, 30, 40, 32, 34, [...]
On the road, Surfin’ views the world of radio through the windshield.
Late last year, the FCC issued a Notice of Proposed Rule Making (NPRM) — WT Docket 09-209 — seeking to amend the Commission’s Amateur Radio Service rules to clarify certain rules and codify existing procedures governing the vanity call sign system, as well as revise certain rules applicable to club stations. Interested parties may make [...]