A Tunable Shunt Selector-Rejector for Audio Amplifiers
- 1 October 1951
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 22 (10) , 726-729
- https://doi.org/10.1063/1.1745749
Abstract
A means for adding, without circuit modification or wiring changes, continuously tunable band‐pass or band‐reject selectivity to existing audio amplifiers is described. This takes the form of an external electronic circuit connected to the amplifier by means of a wire attached to the plate pin of one tube, and a common ac ground connection. The arrangement is useful in laboratory and experimental work for temporarily rejecting or amplifying a particular frequency.Keywords
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