Components

By Mark Forbes, KC9C PO Box 445 Rocklin, CA 95677 This month, several interesting components, plus a possible suggestion or two you can use for a good Christmas present. Everything in electronics has been miniaturized as time has progressed except fuses. Now, Schurter Corporation has come up with a line of fuses which, in the smallest package, are about the size of a 1N914 diode. Each of the fuses bears UL, CSA, VDE and other certifications. The fuses are available in three voltage ratings 63...

Its Fun Its Easy Its Exciting

Information packet. 36 Canada I Mexico, more information, call or write for your free Or send your dues now, check or charge 30 U.S., 45 all else. ( 15 towards the AMSAT journal.) AMSAT, P. O. Box 27, Washington, D.C. 20044 This scheme was originally proposed by Peter Martinez, G3PLX, and I implemented it in the APLINK and PAMS MBO BBSs and Peter implemented it in his AMTOR MBO (the two systems use a common protocol for interchanging traffic). Virtually all the APLINK sysops are using it now so...

Ionsound by WFM

1.8-54 MHz Skywave Propagation Software - Version 4 State-of-the-Art Forecasting for Amateur, Professional & Military Users See April 1992 IEEE Antenna Propagation Magazine product review MENU DRIVEN MUF LUF ANALYSIS COMPLETE TABULAR SUMMARY Confirm QST IONCAP Predictions SNR, Path & Total Link Reliabilites IONOGRAM MUF LUF CHIRP PLOTS PXCC & FREQUENCY PATA PASES Selectable 0-30 0-60 MHz Windows Prefixes, Lat Lon, CQ ITU Zones High-Res Color or B W Graphics Printable Distance Bearing...

Info

X The ARRL aerimenters' Exchange lerican Radio Relay League 5 Main Street wington, CT USA 06111 L.L. Grace introduces our latest product, the DSP-12 Multi-Mode Communications Controller. The DSP-12 is a user programmable, digital signal processing (DSP) based communications controller

AMSATHas Established Amateur Radio As a Permanent Resident in Space

From operating any of 12 Amateur satellites circling the globe today to participating in Amateur Radio activities from the Space Shuttle, the benefits of space based Amateur Radio are available to you by becoming an AMSAT member. Our volunteers design, build and launch state-of-the-art satelites for use by Radio Amateurs the world over. We provide educational programs that teach our young people about space and Amateur Radio. Most of all, we provide our members with an impressive array of...

Multi Mode Computer Radio Interface

Vandiver, WB4LHG 557 Naugher Road Huntsville, AL 35811 The best way to learn about the Amateur Radio digital modes is to build the hardware required to interface a radio rig to a computer, then write the software to make the system work. It is, of course, much easier to go out and buy a multi-mode TNC, plug everything together, and turn it on. If one considers the time involved in building hardware and writing software, buying a TNC again looks attractive. One must decide whether...

Help CELP

One of the forefronts of modern technology is the work being done in speech compression. For many years, much transmitted speech has been digitally encoded. The telephone network makes great use of digital encoding, for example, in part because it makes multiplexing of signals easier. Originally, digitized speech was sent at 64 kbit s. But as digital techniques improved and as a better understanding of the characteristics of speech evolved, the rate at which communications-quality speech could...