Just how far could Nellie Ohr communicate with her HAM radio? Think she had the same level of equipment that the average amateur has? Same training as the avrrage person? Extra training? When one hears about such things as using such a thing as a meteor shower as a reflective surface to bounce comms off of, makes you wonder if chemical spraying with variants of aluminum oxide might not help an agent in the field communicate when conditions were not adequate using “moonbounce” method.

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Weak Signal -- (VHF-DX, Meteor Scatter, EME-Moonbounce)

Introduction

Communicating over great distances via VHF continues to fascinate many amateurs. EME (Earth-Moon-Earth) communication, also known as "moonbounce", meteor scatter, and VHF cw DX are some of the techniques used. In the case of EME and meteor scatter, the concept is simple: use the moon or the ionized trail of a meteor as a passive reflector for VHF and UHF signals. A simple but effective station is within the reach of most amateur experimenters. With the advent of very sensitive receiving preamplifiers and commercially available high-gain Yagi antennas, many VHF operators are enjoying successful weak signal contacts. With a total path length of about 500,000 miles, EME is the ultimate DX -- for the time being! Weak signal VHF work is discussed in a operational way at the Weak Signal Operating page.

Other Articles

A Basic Approach to Moonbounce

QST July 1985, pp. 18-21

Is moonbounce an esoteric mode beyond the reach of most amateurs? No! Recent advances in amateur equipment have brought EME even closer to the mainstream of Amateur Radio.

WSJT: New Software for VHF Meteor-Scatter Communication

QST December 2001, pp. 36-41

Computer software helps to communicate by bouncing signals off the ionized trails of meteors.

JT44: New Digital Mode for Weak Signals

QST June 2002, pp. 81-82

The Journey to EME on 24 GHz, Part 1

QST October 2002, pp. 28-32

Exploring the microwave region for moonbounce

The Journey to EME on 24 GHz, Part 2

QST November 2002, pp. 43-47

Web Links

WSJT Home Page by Joe Taylor K1JT

MoonBounce (EME) Operation by Mike Cook AF9Y

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