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Electronic Hobby Circuits No-1 A collection of articles & simple circuits - some small, simple construction items (three from EFY magazine), plus a 192-page military antenna handbook. Contents: Fuse Monitor 9 Volt 2 Amp Power Supply Instruction Manual for Wenzel Associates Model 20-24 Parallel Interface (14 pages) Transistor Audio Amp (50 milliwatt) Automatic Dual output Display Bass-Treble Tone Control Battery tester Clap Switch DC Motor Control Using a Single Switch Digital Volume Control US Marine Corps Field Antenna Handbook (192 pages) Fire Alarm Using Thermistor Fire Alarm Flashing-cum-running Light Fluid Level Detector