Labels:text | black and white | font | white OCR: Tuning YOUR ORGAN Probably one of the hardest parts of constructing our toy organ is finding a tuning method. One proven method is to use an electric organ. However, many of these are unstable and may have drifted. The Hammond B3 or C3 is a good instrument to use. With the highest drawbar pulled out only, the following notes, starting with the low F, closely agree with the frquencies specified. F5 697 Hz. A6 880 Hz. A better idea is, of course, to use an accurate C#6 1108 Hz. signal generator. If the generator is off, you E6 1318 Hz. can calibrate it by using A= 880 Hz. Or, Ma Bell F#6 1479 Hz. herself can help you. A touch tone phone operates G#6 1661 Hz. very accurately with each row and column having E7 2637 Hz. a single frequency. To get 697 Hz, simply press any two buttons on the top ...
