Added Info ELECTRONICS NOW Sep 1994 (v.65#9) pg. 16
Circuits illustrate how diodes and transistors can be employed for radio receiver channel and band-switching.
ELECTRONICS WORLD Jun 1971 (v.85#6) pg. 34
Simple device provides treble boast to improve intelligibility of radio voice transmission. Est. cost: $3.
ELEMENTARY ELECTRONICS #763 Winter 1965 pg. 105
Basic course in electricity and electronics. Part 8. Radio transmitters and receivers.
ELEMENTARY ELECTRONICS May-Jun 1969 (v.8#2) pg. 71
"Mystery" radio uses a vacuum tube powered by a 1.5-volt penlight battery. Actual components are hidden in the base of the dummy tube.
ELEMENTARY ELECTRONICS May-Jun 1976 (v.16#3) pg. 63
Basic course in electricity and electronics. How radio transmitters work.
ELEMENTARY ELECTRONICS Jul-Aug 1976 (v.16#4) pg. 77
Basic course in electricity and electronics. How radio receivers work.
ELEMENTARY ELECTRONICS Sep-Oct 1976 (v.16#5) pg. 87
Computerized SWL radio log. A computer program written in SWTP 6800 BASIC with Percom LFD-400 disk system. Store all of your standard logbook information (date, station, frequency, time, and location) and then retrieve it in any desired order.
ELEMENTARY ELECTRONICS Sep-Oct 1979 (v.19#5) pg. 69
King spark. An explanation of how early spark-gap transmitters worked.
ELEMENTARY ELECTRONICS Jan-Feb 1980 (v.20#1) pg. 67
Electronics notebook. Learn the basics of radio receiver design.
ELEMENTARY ELECTRONICS Jul-Aug 1980 (v.20#4) pg. 79
Electronics notebook. Fundamentals of radio transmitters and the theory behind them.
ELEMENTARY ELECTRONICS Sep-Oct 1980 (v.20#5) pg. 77
Buying your first "real" radio receiver for world-wide shortwave and broadcast-band listening.
HANDS-ON ELECTRONICS Dec 1986 (v.3#7) pg. 83
Build a foxhole radio. Built from a toilet-paper roll, razor blade, safety pin, tuning capacitor and headphone.
HANDS-ON ELECTRONICS Jan 1988 (v.5#1) pg. 27
Radio station program log maintained on a TRS-80 computer using this BASIC program.
KILOBAUD MICROCOMPUTING #41 May 1980 pg. 22
How to install a combination radio/intercom/burglar alarm system. Est. cost: $250.
MECHANIX ILLUSTRATED #546 Nov 1973 (v.69) pg. 130
How to inject a radio signal into your lawn and then pick up the injected signal using headphones. The ground acts like a giant voltage divider. Est. cost: under $11.
MODERN ELECTRONICS [1] Jun 1978 (v.1#4) pg. 54
Magic Eye device is reminiscent of 1940s radio tuning indicators. Build this project as either a real tuning indicator or "for show" only. Est. cost: $30 (kit).
POPTRONIX HOBBYISTS HANDBOOK Winter 1996 pg. 25
Spread spectrum radio modulation technique. An introduction.
POPULAR COMMUNICATIONS Mar 1994 (v.12#7) pg. 42
Explaining the concept of radio signal bandwidth.
POPULAR COMMUNICATIONS Aug 1994 (v.12#12) pg. 42
The Coherer. Early history of radio and the devices that made it possible. Includes details for construction of a Coherer, a device to pick up radio signals.
POPULAR ELECTRONICS [1] May 1967 (v.26#5) pg. 47
The Liberator, a shirt-pocket size induction (not r.f.) receiver keeps you in touch with a ham, CB or SWL receiver.
POPULAR ELECTRONICS [1] Dec 1970 (v.33#6) pg. 49
A breakdown of transmissions, by frequency, on various public service bands.
POPULAR ELECTRONICS [1] Sep 1979 (v.16#3) pg. 84
Old-time radio circuits. Crystal radio, heterodyne receiver, one-tube radios, Cowper circuit, etc.
POPULAR ELECTRONICS [2] Mar 1990 (v.7#3) pg. 42
Receiver circuits you can build. Modern integrated-circuit electronics makes it a lot easier to design and build your own radio receiver. Looks at front-end, IF-amplifier, detector, and audio circuits.
POPULAR ELECTRONICS [2] Mar 1990 (v.7#3) pg. 46
Early radio transmitters. Includes schematics of typical designs and an explanation of how they worked.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 43
Build a regenerative vacuum-tube receiver that can operate in the frequency range between 550 kHz and 3.95 MHz. Est. cost: $35 (kit).
POPULAR ELECTRONICS [2] Apr 1991 (v.8#4) pg. 29
Added Info POPULAR ELECTRONICS [2] Jul 1991 (v.8#7) pg. 3
All about radio receiver sensitivity. How sensitivity is measured and specified, and what each specification really means.
POPULAR ELECTRONICS [2] Sep 1991 (v.8#9) pg. 61
Inductive-transmission circuits. A way to move audio signals through the air without involving an RF transmitter or receiver. (1) Two-stage receiver. (2) Heavy-duty transmitter. (3) Remote-control transmitter. (4) Remote-control receiver. (5) Low-pass filter.
POPULAR ELECTRONICS [2] Aug 1994 (v.11#8) pg. 78
The new/old autodyne (a receiver design which is similar in basic concept with the superheterodyne). Experimenting with direct conversion receiver circuits.
POPULAR ELECTRONICS [2] Aug 1997 (v.14#8) pg. 39
Getting started in two-way radio as a hobby, a business aid, or a lifesaving device.
POPULAR MECHANICS Dec 1972 (v.138#6) pg. 120
All about spread spectrum communications. Learn about methods used to achieve reliable communications under the most difficult conditions.
RADIO-ELECTRONICS Apr 1987 (v.58#4) pg. 55
The early days of radio. Part 3. Learn about the many discoveries and inventions that led to the development of radio.
RADIO-ELECTRONICS Apr 1987 (v.58#4) pg. 59
The early days of radio. Part 4. Radio pioneers discover how to amplify signals.
RADIO-ELECTRONICS Jul 1987 (v.58#7) pg. 52
The early days of radio. Part 5. More nostalgia from radio's pioneer days.
RADIO-ELECTRONICS Dec 1987 (v.58#12) pg. 64
Added Info RADIO-ELECTRONICS Feb 1988 (v.59#2) pg. 16
The early days of radio. With better tubes came better radio designs.
RADIO-ELECTRONICS Aug 1988 (v.59#8) pg. 57
Tunable RF preselectors. How they work and their role in radio receivers.
RADIO-ELECTRONICS Jan 1989 (v.60#1) pg. 82
Short-range loop transmitting and receiving.
SCIENCE & MECHANICS #218 Jun 1963 (v.34#6) pg. 111
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.
SCIENTIFIC AMERICAN Mar 1968 (v.218#3) pg. 128