Electronic Circuits & Secrets of an Old-Fashioned Spy

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Electronic Circuits & Secrets of an Old-Fashioned Spy

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Manufacturer Description

Learn to build bugs or take advantage of those already in place; assemble a DTMF decoder or decode phone tones without one; construct a red box for free pay phone calls; crack answering machine passwords; defeat digital and spread-spectrum cordless phones with an FM phone tap; and much more! For academic study only.