TY - JOUR
AU - Astbury, N F
AB - The note describes a simple method of comparing an unknown frequency with a harmonic of a standard frequency, a copper-oxide rectifier being used to rectify the resulting beats. In particular, the use of the 50 C.P.S. public supply as a frequency standard is described, the harmonic content of the mains being increased by distorting the supply with a rectifier. With this arrangement frequencies up to 2500 C.P.S. can easily be checked against the mains, higher frequencies being obtainable under favourable conditions. There are no inductive coils or tuned circuits in the arrangement, and the power consumption is very small.
TI - A note on the calibration of audio-frequency oscillators
JF - Journal of Scientific Instruments
DO - 10.1088/0950-7671/14/10/304
DA - 1937-10-01
UR - https://www.deepdyve.com/lp/iop-publishing/a-note-on-the-calibration-of-audio-frequency-oscillators-q7wHI0LQLW
SP - 339
VL - 14
IS - 10
DP - DeepDyve
ER -