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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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CRYSTAL RADIO xx CRYSTAL (ELECTRONIC) xx RADIO Schematic and instructions for building a simple bandpass type tuner, using a crystal detector, that is designed for local reception over the entire broadcast band. High-quality AM from a crystal radio. Design and construction of a mono receiver. Crystal set is a good emergency radio. Cat's whisker receiver. Build this update of the classic crystal set. Updated crystal set is powered by radio signal being received. Three basic radios for beginners. (1) crystal radio, (2)amplified crystal radio, and (3) regenerative radio. Crystal radio fits inside a greeting card. Makes an unusual gift. Est. cost: $2. Simple one-transistor amplifier boosts the weak audio output of the Heathkit crystal radio CR1. Replica of a loose coupler or receiving-type transformer crystal radio. One diode and capacitor added to any AM detector will nearly double the output. Can also be used on CB, shortwave or crystal sets. Old-time flavor crystal radio is built from new parts, but is housed in a cabinet and equipped with an antenna reminescent of a genuine antique. Build a "genuine" crystal radio by winding the tuning coil on an oatmeal box from the Quaker Oats Company. Complete instructions included. See-through crystal radio is housed in a clear plastic cube. Build a carborundum crystal detector like those used for early radio stations on boats and ships. Crystal detectors and how they work. How to build a crystal receiver on a piece of pine board with a coil wrapped around an oatmeal box. Roaring twenties receiver. A crystal receiver housed in an elegant wooden cabinet with a lift up lid. The tuning dials and crystal are mounted on the front of the cabinet. Tips on building a "fox-hole" radio. Supercharged crystal radio. Integrated circuits add super-performance to grandpa's crystal radio. Schematic diagram for a crystal radio. The building block radio. Each stage of this crystal radio is mounted on a separate piece of wood that lets you test each stage before adding the next. You can experiment with a part of the circuit without disturbing the rest. Schematic for a simple crystal set. Build a sliding-bar crystal radio. Crystal diode detector. Circuit for a modern-day version of a vintage crystal set. Cat's-whisker detector is replaced by a germanium diode. Powered by an RF power cell. The crystal in crystal radio sets. An historical look at the construction of crystal radio sets which use crystalline galena. Build a crystal set radio for under $7. A handmade homestead radio. Build a modified crystal receiver. Est. cost: $8. Penny power radio. Home-built radio uses a single transistor, a coil you wind yourself, a safety pin and a copper penny (to supply the power). Tip: Use a homemade loading coil to improve AM reception on a crystal radio. Modern crystal set. How to build "free-power" radios. The successors to crystal radios use single high-gain transistor amplifier. Power is derived from random electrical noise found in the atmosphere. Low-cost transistorized audio amplifier for crystal radio. Improve the sensitivity of crystal radios. Tips on component selection. Tips on crystals and catwhiskers used in early crystal radios. Build an ocean-spanning crystal receiver which covers the 49-, 41-, and 31-meter international broadcast bands. Build an authentic fox-hole radio without spending any money. Wind your own coil, make a fixed-value capacitor, use a razor blade detector, etc. Build a matchbox-size crystal radio. Uses variable-inductor tuning to give constant bandwidth and volume over the entire tuning range. Tapped coil crystal radio incorporates a variable resistor. Tunable crystal radio circuit replaces the broadcast-band tuning capacitor with a fixed capacitor and a horseshoe magnet. Old-time radio circuits. Crystal radio, heterodyne receiver, one-tube radios, Cowper circuit, etc. Tunable/amplified receiver circuit goes two steps beyond the conventional crystal radio by adding a tuned RF amplifier and an audio-amplifier stage. Roll your own radio. Build a simple five component crystal radio receiver using materials that you may have on hand. A cardboard-tube crystal radio. Crystal set lore. Planing a crystal-set project using construction techniques of the early 1920's. Part 1. Quaker Oats radio promotion, Bureau of Standards crystal set, theory, etc. Crystal set lore. Planing a crystal-set project using construction techniques of the early 1920's. Part 2. The National Bureau of Standards crystal set. Crystal set lore. Planing a crystal-set project using construction techniques of the early 1920's. Part 3. Getting started on building the National Bureau of Standards crystal set. Crystal set lore. Planing a crystal-set project using construction techniques of the early 1920's. Part 4. Assembling the National Bureau of Standards crystal set. Crystal set lore. Planing a crystal-set project using construction techniques of the early 1920's. Part 5. Testing the National Bureau of Standards crystal set. Crystal set lore. Planing a crystal-set project using construction techniques of the early 1920's. Part 6. Postscript and comments on the National Bureau of Standards crystal set. Build a new version of the classic variometer radio. A sliding coil is used to tune the broadcast band. Coil winding jig for the NBS (National Bureau of Standards) crystal radio set. Schematic and component description for a crystal set with full-wave rectification. Crystal sets. Part 1. (1) Making both small and large coils. (2) Broadband RF tester. (3) Tunable dual-coil. (4) Tunable single-coil. (5) Fine tuner. Crystal sets. Part 2. (1) Headphone amplifier. (2) Speaker amplifier. (3) Tapped coil. (4) RF amplifier receiver. (5) Improved RF amplifier receiver. (6) Solid-state regenerative receiver. (7) RF filters. Simple crystal AM receiver circuit. Build a crystal set radio which uses a round salt box for winding the coil. Est. cost: $5. Tips on making your own crystal detector for a crystal radio. The early days of radio. Part 1. Original "solid-state" receivers. Includes typical crystal set designs. Old-time crystal radio. Build a vintage-style crystal radio receiver with performance that might surprise you. Features an antenna-tuning circuit that is separate from the main frequency-selection circuit. Est. cost: $80 Tips on making a "razor-blade detector" for a homebuilt radio. Crystal set uses perf-board construction. Est. cost: $4. Replica of an antique radio receiver featuring dual-slide tuning control, fully adjustable catwhisker, and a super-sensitive crystal. Crystal radio uses a galena crystal, a magnet, a darning needle and miscellaneous hardware. Radio from the roaring '20s. Build an authentic book condensor crystal set. Boost performance of a crystal radio by adding a tuned RF amplifier. Replica of a "genuine" wireless receiving apparatus. Features dual-slide tuning control, adjustable catwhisker and super-sensitive crystal. Crystal radio uses magnet from speaker, a galena crystal and a darning needle. Radio of the roaring 20's. Build a crystal receiver similar to the 1920's model with a wood cabinet, lift-up lid, hand-wound tuning coils, etc. Requires earphones for use. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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