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These all smell a little musty or smoky. I haven't typed all the small articles, columns or the reviews without schematics. December, 136 pages, 6 by 9 inches, half of the last page is cut out (the Advertisers Index page), rusting staples * Frequency Synthesizer for 220 MHz. Construction details for a simple frequency synthesizer for the 220-MHz amateur band. Hank Olson * Understanding Q. A discussion of the Q of LC tank circuits, and its effect on transmitters, receivers and antennas. Carl C. Drumeller * Making Your Collins 75A4 Perform Like New. How to clean up the all-too-common tuning problems of an old but popular receiver. Paul D. Rockwell * Circularly Polarized Ground-Plane Antenna for Satellite Communications. Combining the characteristics of two popular satellite antennas to yield a novel design optimized for satellite communications. Dale W. Covington * Three-Digit Touch-Tone Decoder for Selective Calling. Using tapped toroids to build a compact, low-cost Touch-Tone decoder. John F. Connors * How To Convert Your VTVM to an IC Voltmeter. Simple solid-state VTVM conversion uses LM310H voltage-follower IC, costs less than five dollars. Mike Kaufman * VHFer's View of Solar Cycle. A discussion of Solar Cycle 20, now on the wane, and its effects on long-distance 50-MHz propagation. Pat Dyer * Improving the Performance of Low-Frequency Vertical Antennas. Three basic ideas for improving the efficiency of your antenna system. Raymond H. Griese * Ham Radio Cumulative Index 1968-1974 (1974 dec amateur ham radio magazine shortwave technical was posted and is owned by: Bridget Fitzpatrick) |
bridgetfitzpatrick@chicagopartsnetwork.com (Bridget Fitzpatrick) for more information.
