PIANO_TUNING_AMPLIFIER

Published:2009/7/1 23:58:00 Author:May | From:SeekIC

Used with battery-powered digital tuning aid that provides 12 equal semitones of octave, between 261.6625 and 493.8833 Hz, for equal-temperamenttuning of such keyboard instruments as organ. piano. and harpsichord. IC used is part of RCA amplifier kit KC-4003 which includes T1 and other discrete components. Article gives circuits for oscillator and programmable divider, along with instructions for construction. calibration. and use.-W.S. Pike. Digital Tuning Aid. Wireless World. July 1974. p 224-227.



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