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ARRL's Hands-On Radio Experiments -- Over 60 basic electronics experiments from the pages of QST!

Introduction to Radio Frequency Design -- Basic RF concepts (with some related analog subjects) for the amateur or engineer.

Hints & Kinks--17th edition -- Now including the popular Hands-On Radio column from QST Workbench.

Discrete-Signal Analysis and Design -- A clear, step-by-step approach to practical uses of discrete-signal analysis and design, especially for communications and radio engineers.

Experimental Methods in RF Design -- Immerse yourself in the communications experience by building equipment that contributes to understanding basic concepts and circuits.

   

The K7RA Solar Update

SEATTLE, WA, Nov 24, 2004 -- This is an early propagation bulletin because of the Thanksgiving holiday. There will be another bulletin on Monday, November 29, which will summarize the solar flux, sunspot numbers and geomagnetic A index for this week which normally appears at the end of this bulletin.

A few days ago was the phone weekend of the ARRL Sweepstakes Contest. Last weekend was not plagued by solar wind and the high geomagnetic activity we experienced around November 7-12, although there were some unsettled periods.

In a few days the CW weekend of the CQ Worldwide DX Contest begins, and no big solar or geomagnetic effects are expected for this contest weekend either. The forecast calls for moderate geomagnetic conditions and a rising solar flux. Flux values have been around 100 lately, but should rise over the next few days. Predicted solar flux is expected to peak at about 135 around November 28-29, and for November 24-27 the expected values are 115, 120, 125 and 130.

Amateur solar observer Tad Cook, K7RA, Seattle, Washington, provides this weekly report on solar conditions and propagation. This report also is available via W1AW every Frida,y and an abbreviated version also appears in The ARRL Letter. Readers may contact the author via e-mail.

   



Page last modified: 08:29 AM, 24 Nov 2004 ET
Page author: awextra@arrl.org
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