Published:2009/7/13 5:40:00 Author:May | From:SeekIC
Linear voltage-controlled variable-frequency oscillator converts standard recorder to low.frequency f-m recorder for 0.1 to 1,000-cps signals. Values are: R1-18,000; R2-100,000; C-0.01 mfd; R-10,000; Q1-2N591; Q2-2N491; Vcc-20v; R4-270; fo-2.5 kc.-J.Schwartz, Unijunction Transistor Simplifies Voltage-Frequency Converter, Electronics, 36:43, p56.
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