1.0 out of 5 stars
A disappointment even for wannabe spies, Sep 2 2001
This review is from: Electronic Surveillance Devices (Paperback)
The author presents dozens of circuits for audio surveillance devices many feature obsolete components like 741 operational amplifiers. They have such poor stability and noise poor performance that they have not been used for many years. Others use design techniques that were abandoned long ago such as transmitters made from one-transistor oscillators.
Basic physical principles are ignored. A diagram of a laser for eavesdropping through a window shows a collimated beam passing through a simple convex lens without being spread. The laser beam bounces off the glass at at an angle defying explanation.
Who can remember vidicon TV cameras? This old design is featured as one of two main types of cameras.
The section on countermeasures misses most useful techniques for finding bugs. For example, if any of the circuits shown in this book were hidden under a board room table a nonlinear junction device location technique would be most commonly used to discover it. This technique is not discussed by the author, however.
[exerpted from a review for Security Management all rights reserved]
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