|
 |
 |
 |
|
 |
|
 |
|
|
Last Updated
03/31/2019
Sitemap
|
|||||||||
Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
|||||||||
|
SHORTWAVE RADIO sa AMATEUR RADIO sa SHORTWAVE RADIO CONVERTER xx RADIO Tips on getting started in shortwave radio. Covers shopping for basic equipment, tuning ranges, where to get station listings and some shortwave jargon. Tips on getting started in shortwave radio listening. Schematic for an inexpensive shortwave receiver for the beginner. Est. cost: $20. EZ Shortwave receiver is a true superheterodyne that tunes 8.5 to 11 Mhz in two bands and includes a 455-kHz IF filter, automatic gain control, tracking RF tuning, and a very sensitive detector. Powered by a 9-volt battery, it has a sensitivity of under a microvolt. CW (Morse code) filter. An add-on audio filter having a narrow bandwidth will improve CW reception. Receiver preamplifiers. Design and build a "front end" for your shortwave or VHF/UHF receiver. Used to boost weak signals before they are applied to a receiver's input terminal. Tune CW or SSB on any radio with $3 Universal BFO. One-transistor shortwave converter turns any broadcast radio into a shortwave receiver tuning from 5 to 15 mc. Powered by 9-volt battery. SWL booster is designed to give super sensitivity to budget receivers (those without a tuned RF stage). Booster uses a tetrode Nuvistor and gives up to 40 dB gain from 5 to 15 mc. One-tube all-bander. A low-cost, high-performance receiver for the listener on a budget. Operating frequency is changed by plugging in a different coil for each band 15, 20, 31, 40, 80, and 160 meters plus the broadcast band. VHF receiver tunes from 26 to 162 megacycles without changing coils. This 3-tube receiver has a 5-position switch for selecting bands. Combination Q-multiplier and variable BFO improves the performance of inexpensive shortwave receivers. Beat frequency oscillator (BFO) for any radio. Allows transistor radios with shortwave tuning to pick up SSB and code transmissions. High-gain tunable RF preamplifier covers the international shortwave and ham bands between 5 and 30 mc. Provides over 40 dB overall gain. Est. cost: $16. One-tube regenerative, 3-band receiver tunes the broadcast band 3 to 8 mc and 8 to 14 mc. World band (shortwave) radio receiver. Features performance of high-priced units, but does not use digital frequency synthesis. Est. cost: $100. Build a shortwave radio receiver using either surface-mount components, through-hole components, or a mix of the two. The circuit is essentially a superhetrodyne AM receiver that can pick up stations that broadcast on frequencies as high as 17 MHz. Est. cost: $25 (kit). Convert an old AC-DC table radio into a crystal controlled shortwave receiver for one frquency between 5 and 20 MHz. Est. cost: $5. VHF extender extends the frequency of shortwave receivers into the very high frequency region. Est. cost: $20. A battery-powered regenerative preselector using a high-gain field-effect transistor (FET) will boost weak signals about 40 dB before they reach your receiver. Tips on assembling the Science Fair 3-transistor shortwave receiver kit from Radio Shack. Electronic transplant receiver. SWL receiver combines the sensitivity of the regenerative detector with stability of the superhet. Uses two tubes and pre-wound plug-in coils. Modify an inexpensive Lafayette HA-226 to improve SW reception. Improve the selectivity of low-cost shortwave receivers by adding an IF amplifier module. Pick up 40 dB gain and an additional 18 dB of selectivity at 10 KHz. Circuit for SW frequency spotter allows power house markers to be put on shortwave bands. Circuit for a BFO to pick up CW and SSB signals. Does not have to be attached, only placed near, a multiband transistor portable radio. Amateur radio and shortwave listening enthusiasts can use this modified globe to calculate the actual distance to the source of a radio signal. Outboard booster for shortwave receiver can add 20 to 40 dB of gain. Est. cost: $19. Three-band preselector for shortwave receivers will add selectivity and additional gain. Full SWL hand coverage from 1.7 thru 36 MHz. An SWL's guide to choosing the right receiver. Eighteen models compared for performance and price. SWL station finder will make it easier to locate a desired SW station on a receiver the following day. It is an RF oscillator which is "zero beat" with the desired SW station frequency and will hold the calibration and deliver a frequency close enough to the station frequency to locate the station on the following day. Covers 5- to 18-MHz range. Piggyback SWL preselector adds 12-to-20 dB of signal gain. A preselector is a tunable high-Q preamplifier that passes only the desired frequency. Powered by a 9-volt supply. Spider web receiver. Homebuilt SWL receiver uses the spiderweb type of tuning coil. Unit will cover from 550 kHz to 14 MHz with three plug-in spiderweb coils in a FET regenerative detector circuit. "Shortwave supercharger". Accessory circuit will boost gain of shortwave receivers by 20-30 dB and improve selectivity. Helps improve the performance of old SWL sets and even newer ones during periods of increased sunspot activity. Build an antique shortwave radio receiver. Features 1930's tridoe vacuum-tubes and plug-in spiderweb coils. Integrated circuit shortwave receiver. Uses a CMOS IC to provide enough amplification to drive a loudspeaker. Est. cost: $7. Buying your first "real" radio receiver for world-wide shortwave and broadcast-band listening. Schematic circuit for a shortwave receiver monitor plugs into the earphone jack of a receiver. Whenever a signal is received, the monitor sounds an alarm or flashes a lamp. DX-Com. Crystal-controlled converter allows you to tune three shortwave-broadcast bands on your car radio. Est. cost: $15. Getting started listening to international news and propaganda broadcasts. Seven things to do with shortwave radio. Includes listening to news, vacation ideas, time signals, general listening, learning a foreign language, taping music, and listening to unusual sports broadcasts. Shortwave converter for AM receiver tunes 9- to 15-MHz band. Shortwave receivers: How to choose yours. Specifications and features found on receivers. Buying new, used or surplus receivers. The top ten factors. How to control the Yaesu FRG-8800 general-coverage shortwave CAT (computer-assisted transceiver) receiver with a Commodore C-64 (C-128) computer. Shortwave listening. Looks at international broadcasts, receivers, antennas, etc. Some operating tips for the modern world-band and all-band receivers. Using the memory, general tuning, tuning the bandwidth, etc. Help for the shortwave program listener. Tips on receiving overseas programs via the Radio Canada International relay transmitter. World band broadcast listening with a portable. Part 1. Description and operation. World band broadcast listening with a portable. Part 2. Tuning tips and antenna. Organization of your world-band listening. Tips on keeping track of the many time and frequency changes encountered when tuning shortwave bands. What to do about reducing electrical noise (radio-frequency interference) in SWL receivers. Two-tube shortwave receiver covers from 500 KHz to 30 MHz in four bands. Convert just about any AM broadcast band radio into a 75- and 80-meter ham band receiver to pick up CW, SSB, and AM phone signals. No physical connection between converter and the AM radio. Est. cost: $14. Souping up the Heath GR-54 deluxe SWL receiver to improve sensitivity. Est. cost: $5. Shortwave converter for AM broadcast receiver. Tunes 14-31 MHz. Est. cost: $7. Dehumming small receivers. Perk up your shortwave listening. A simple shortwave converter for a portable transistor radio. Commercial receivers for the shortwave listener compared. Receivers for the shortwave listener. Part 2. Table model and portable receivers. Five experiments you can do with a shortwave receiver. What to look for in a shortwave receiver. Collecting shortwave folk music. A facinating and rewarding hobby for SWLs. How to improve SW receiver tuning accuracy. Frequency plotting on graph paper enables you to pinpoint frequencies within 5 kHz on inexpensive receivers. A simple shortwave converter for any AM radio. Grandpa's shortwave receiver. Build this regenerative receiver which uses handmade coils and varactor diodes in place of variable capacitors. Curing computer-induced electromagnetic interference on shortwave receivers. Build this fiber-optic interface unit for attaching a digital computer to a SW receiver. High-performance shortwave converter for an AM car radio results in a portable SW receiver with good signal selectivity. RF enhancement circuits designed to breath new life into older shortwave receivers, or to pull in a DX broadcast station from across the country on a generic AM radio. (1) Signal-grabber. (2) Signal booster. (3) Tunable trap. (4) Signal scrubber. (5) VLF converter. Restoring a classic shortwave receiver. Tips on selecting a unit to restore, likely problem areas, etc. Add CW and SSB to any shortwave receiver using this simple adapter. Build the RADFAX decoder to display shortwave non-voice transmissions on your IBM-compatible personal computer. Receive and decode weather charts, radioteletype, Morse transmissions, etc. Est. cost: $60. Build a preselector to improve the performance of a shortwave receiver. Several circuits shown. Design and build a front end (preamplifier) for your shortwave or VHF/UHF receiver. This circuit utilizes the MAR-x series of monolithic microwave integrated circuit (MMIC). Super-Simple Shortwave Receiver. A single-conversion superheterodyne designed for listening to AM broadcast stations in the range of 4- to 10-MHz (75- to 30-meters). This receiver can tune any 2.5-MHz portion of the 4- to 10-MHz shortwave radio band you select. Est. cost: $30 (kit). Test gear for SWL's (shortwave listeners). How to check the performance of your radio and your antenna system by making simple measurements using the equipment described in this article. Build a nine-band (11- thru 49-meter) shortwave receiver. A solid-state version of the classic regenerative receiver. Choosing the right shortwave communications receiver (an advanced device that receives a variety of signal under difficult conditions). Looks at both new and used equipment, sources, etc. Restoration of the Knight (Allied Radio) Star Roamer shortwave receiver (circa 1966). Part 1. Restoration of the Knight (Allied Radio) Star Roamer shortwave receiver (circa 1966). Part 2. Restoration of the Knight (Allied Radio) Star Roamer shortwave receiver (circa 1966). Part 3. Restoration of the Knight (Allied Radio) Star Roamer shortwave receiver (circa 1966). Part 4. Restoration of the Knight (Allied Radio) Star Roamer shortwave receiver (circa 1966). Part 5. Guide to choosing the best shortwave equipment for the type of broadcasts you want to hear. Includes chart of broadcast frequencies and program times by country and a time-zone conversion chart. How to enjoy worldwide adventures on the airwaves. A guide to shortwave listening, including list of clandestine stations. Here is a BFO circuit for shortwave receivers that helps to clarify reception. Tuning in on worldwide SW stations. A brief introduction to equipment, antennas and frequencies. Circuit for a crystal-controlled converter which will allow you to listen to shortwave broadcasts on an ordinary AM radio. Broadband amplifier circuits like those found in modern transistorized shortwave receivers are explained. New life for old car radios. How to convert a car radio into a high-quality receiver for your home. Part 2. Build a shortwave converter. Shortwave radio. What it is and how it works. What makes shortwave radio possible. A look at layers within the ionosphere that impact shortwave radio. Shortwave radio. General conditions for July and August. A look at seasonal variations in the ionosphere which impact shortwave radio. Shortwave radio. General conditions and more on fundamentals. How sunspot activity affects shortwave radio. Using the National Bureau of Standards radio stations (WWV, WWVB, WWVH) to learn about current radio conditions. One-band shortwave converter for a car radio. Covers any 1-MHz segment between 5-30 MHz depending on components selected. EZ shortwave receiver is a true superheterodyne that tunes 8.5 to 11 MHz in two bands and includes a 455-kHz IF filter, automatic gain control, tracking RF tuning, and a very sensitive detector. Attaching a military-surplus longwave receiver to any all-band receiver to create a BFO (beat-frequency-oscillator) circuit. BFO needed to receive CW and SSB signals. All connections are external. Dipperette-1, a mixer circuit. When used with a grid dip oscillator as the local oscillator, it is a shortwave converter that will tune in a healthy SW signal via any standard AM radio. Est. cost: $4 (less power supply). A Lafayette Radio module consisting of two complete transistor IF stages plus a crystal filter will improve the reception from inexpensive shortwave receivers. Est. cost: $6. An accessory squelch circuit will improve reception from inexpensive VHF receivers by eliminating spectrum noise or hiss when no signal is being received. Tips on selecting and rejuvenating older shortwave receivers. How to replace obsolete rectifiers with silicon diodes, replace obsolete tubes with new miniature types, etc. SWL receiver preamp is a wide bandwidth RF amplifier that provides 12- to 15-dB of signal gain. Covers 3- to 30-MHz. Est. cost: $6. Tips on improving the sensitivity of a shortwave receiver. Multiband VHF receiver will tune from 26 to 185 MHz by plugging in one of five coils. Est. cost: $24. Tune in news and science with your shortwave receiver. (1) Deciphering hourly WWV and WWVH informationcasts. (2) Adding an antenna to improve reception. (3) Maintaining a log book. Building miniature, short-range transmitters of the type often used in biomedicine. Applications shown include (1) temperature-sensing, (2) pressure-sensing, (3) long-range animal tracking, (4) pH sensing, and (5) a passive transmitter. Electronic "beeper box" eliminates stray noises when shortwave signals are being recorded on tape cassettes. It also allows putting distinctive marker sounds on the tape. Later analysis of such tapes allows the precise times of astronomical events to be determined. | |||||||||
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. |
|||||||||