C_BY_GRID_DIP

Published:2009/7/10 21:31:00 Author:May | From:SeekIC

Values of unknown capaci-tances up to about 1000 pF can be measured with simple circuit used with griddip oscillator.Coil L can be 6 turns of stiff wire, To calibrate, close variable capacitors C1 and C2 fully, tune for dip, and note dip frequency at pointer position of C2. Now connect known capacitors up to 1000 pF one by one to CX, retune C2 for dip, and mark capacitor value on C2 dial. Close C2, then repeat calibration for C1 while using smaller capacitors up to 50 pF.-F, G. Rayer, GDO to Find C, 73 Magazine, Aug. 1974, p 35.



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