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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

xx   RADIO

Longer than longwave. A radio amateur's look at the very bottom of the electromagnetic spectrum. Part 1.
CQ. THE RADIO AMATEUR'S JOURNAL Jan 1998 (v.54#1) pg. 16

Longer than longwave. A radio amateur's look at the very bottom of the electromagnetic spectrum. Part 2.
CQ. THE RADIO AMATEUR'S JOURNAL Feb 1998 (v.54#2) pg. 38

Build the Whistler VLF (very-low frequency) receiver to detect the OMEGA radio-navigational system signals which operate between 10 and 14 kHz.

Full-band very low frequency (VLF) receiver (10 kc to 30 kc). Picks up naval surface and submarine communications and frequency-standard and time transmissions.
ELECTRONICS ILLUSTRATED Mar 1966 (v.9#2) pg. 39

One-tube low-frequency converter. Construction of a converter operating from 15 to 2,000 KHz for use with receivers tuned to 10 meters. Covers the range below 150 meters.
ELECTRONICS WORLD Jul 1967 (v.78#1) pg. 28

Experimenter's receiver designed to pick up low frequency band (300 kHz down to 30 kHz) and the very-low frequency band (30 kHz down to 3 kHz). Circuit uses two ICs and three FETs in a simplified regen detector with a two-stage rf amplifier.
ELEMENTARY ELECTRONICS May-Jun 1975 (v.15#3) pg. 49

Chorus, sferics, tweaks, and whistlers. Strange VLF natural radio phenomena continues to fascinate. Tips on listening to very-low-frequency radio phenomena.
POPULAR COMMUNICATIONS Jan 1995 (v.13#5) pg. 8
Added Info POPULAR COMMUNICATIONS Jun 1995 (v.13#10) pg. 6

What's happening on the very low frequencies? How to access radio reading services, a 24-hour source of news you can use.
POPULAR COMMUNICATIONS Aug 1995 (v.13#12) pg. 30

Transmitter and receiver to experiment with "ground communications", the radio waves that travel along or beneath the surface of the earth.
POPULAR ELECTRONICS [1] Jan 1968 (v.28#1) pg. 49

What's on the air below 500 kHz. Part 1. How long waves (600 meters and below) propagate and what can be heard below the AM broadcast band.
POPULAR ELECTRONICS [1] Feb 1980 (v.17#2) pg. 88

What's on the air below 500 kHz. Part 2. Longwave receiving equipment, antennas, and the 1750-meter experimenter's band.
POPULAR ELECTRONICS [1] Mar 1980 (v.17#3) pg. 75

Build the "Whistler" VLF (very low frequency) receiver to receive the U.S. Navy's OMEGA radio-navigation signals (10- to 14-kHz).
POPULAR ELECTRONICS [2] Jul 1989 (v.6#7) pg. 39

Build a VLF (very low frequency) transmitter and receiver to explore the world below 10 kHz. Operates up to 1/4 mile.
POPULAR ELECTRONICS [2] Jul 1990 (v.7#7) pg. 29

VLF (very-low-frequency) CW-SSB-AM receiver circuit tunes RF signals between 150 kHz and 250 kHz.
POPULAR ELECTRONICS [2] Aug 1991 (v.8#8) pg. 72

Audio amplifier circuits. (1) Bird-feeder monitor. (2) Ear protector disables amplifier if output volume exceeds a preset level. (3) Variable-frequency audio oscillator. (4) Very-low frequency whistler receiver.
POPULAR ELECTRONICS [2] Oct 1993 (v.10#10) pg. 72

Frequency converter circuits. (1) Translate WWV's 10-MHz signal to the 75-meter ham band. (2) Translate VLF signals to the 6000-kHz region.
POPULAR ELECTRONICS [2] Jul 1996 (v.13#7) pg. 62

Cruising the lowest ham bands. Receivers and antennas for tuning the LowFERS (Low Frequency Experimental Radio Station) and MedFERS (Medium Frequency Experimental Radio Station) bands which operate in the 160-190 kHz and 510-1705 kHz frequency ranges.
POPULAR ELECTRONICS [2] Feb 1997 (v.14#2) pg. 39

VLF (very-low-frequency) and LF (low frequency) ham-radio bands. (1) Simple VLF/LF-to-HF converter circuit lets you receive these bands on either 3.5 to 4 MHz or 4 to 4.5 MHz. (2) Soup up your receiver with this VLF/LF preamplifier circuit.
POPULAR ELECTRONICS [2] Mar 1997 (v.14#3) pg. 67

Build this low-band converter to tune from 3 to 300 kHz.
RADIO-ELECTRONICS Jan 1983 (v.54#1) pg. 47

Low frequency transmitter. Build this no-license-required 1-watt transmitter for operating Morse code on the 1750-meter (180 kHz) band.
RADIO-ELECTRONICS Sep 1989 (v.60#9) pg. 43, 64

Low-frequency converter is combined with a standard AM radio to hear traffic in the frequency range of 10 kHz to 550 kHz.
RADIO-ELECTRONICS Sep 1989 (v.60#9) pg. 47, 64

One-tube receiver designed especially for listening to the Navy's super-powered CW station that operates in the vicinity of 20Hz (kc), with wavelengths about 15,000 meters long. Tunes from 13 to 28 KHz. Self-contained power supply. Est. cost: $14.
RADIO-TV EXPERIMENTER Apr-May 1967 (v.22#2) pg. 46

One-tube receiver especially for eavesdropping on the Navy's super-powered CW stations that operate in the vicinity of 20 KHz (kc). Tunes wavelengths in the neighborhood of 15,000 meters.
SCIENCE & ELECTRONICS [1] Dec 1970-Jan 1971 (v.28#6) pg. 28

Listening to nature's radio. In pursuit of natural radio events (whistlers, dawn chorus, hooks, hiss, risers and tweeks) which occur at very-low frequencies (from 1 to 10 kilohertz). The construction and use of a simple receiver is described.
SCIENCE PROBE! Jul 1992 (v.2#3) pg. 87