Norman Lathrop Enterprises  
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Lathrop Report On Newspaper Indexes
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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.

SONAR
xx   RADIO

Fish finding 101. Tips on understanding and using an electronic (sonar) fishfinder.
BOATING WORLD #141 Jul 1998 pg. 30

Combine automatic sonar ranging and infrared-light detection in a computer-controlled scanner. Uses a Polaroid Ultrasonic Ranging System.
BYTE Nov 1980 (v.5#11) pg. 32

An ultrasonic ranging system. "SonarTape" measures distances from 1.5 to 35 feet using sound waves. Utilizes the TI SN28827 sonar-ranging module.
BYTE Oct 1984 (v.9#11) pg. 113

Ultrasonic (sonar) transmitter for secret transmissions or demonstrating doppler shift radar.
POPULAR ELECTRONICS [1] Sep 1964 (v.21#3) pg. 41

Build your own sonar system. Simple circuit uses one IC and can be used as a submerged object detector, depth finder or fish locator.
POPULAR ELECTRONICS [1] Jul 1976 (v.10#1) pg. 81

Scanning underwater surfaces. How to build a sonar system. A low-cost underwater transducer can be used to locate fish and other objects.
SCIENTIFIC AMERICAN Aug 1994 (v.271#2) pg. 90