Resonance Meter

48 INTERMEDIATE PROJECT A series of projects for the not-so-experienced constructor. Although each article will describe in detail the operation, use, construction and, where relevant, the underlying theory of the project, constructors will, none the less, require an elementary knowledge of electronic engineering. Each project in the series will be based on inexpensive and commonly available parts. 5. Resonance meter J. Bareford The present intermediate project follows this month"s theme by venturing out into the fascinating world of radio techniques. The test instrument discussed is a must for anyone working with RF signals, but with a limited budget. It enables the resonance frequency of tuned circuits to be measured within the range of 100 kHz to about 50 MHz, and can also be used as a capacitance meter, RF test generator and RF signal probe. Traditionally, the name of the instrument of the type to be described has evolved from grid dipper to gate dipper or simply dipper. The f...