Show wa A checks frequency of Seja sending dh seta bureau of standards co coop op crates elates with radio broadcasting stations js checking the frequency of trans trana gottlog sets to one way la which the tb bureik of standards operates cooperates co wu with radio broadcasting stations since sinca the strict rulin ruling of the federal ar 11 radio c that assigned frequencies be adhered to within OS 03 kilocycle ma many i ny devices iced used by stations to observe the have been calibrated by the government igind ards arda experts A broadcasting station must ex pend considerable money and timeka time la 0 order ider to maintain its assigned re quency says 4 J of the bureau of standards in a recent gp corn A suitable e device devia w which li lc will 11 indi indicate the fluency fique ney at which the broadcasting elation transmits 6 cannot n nat bo be made up from odds an and ends secured at random this fact to Is anted by all broadcasting station oper as is evidenced by ioie of tho devices sent to the bureau for calibration brat loo the bureau has refused mused to calibrate any apparatus which alch was ot of poor construction or oc that teemed to be unreliable as a frequency standard elezo oscillators and frequency rooters meters wave meters are included la in devices generally employed by broadcasting stations station forche tor checking eking transmitting frequency the elezo oscillator la Is the most ap accurate checker now la in use uee says briggs brigga frequency waler s as usually constructed will not bat register a frequency change gs as small its ai 03 05 le end and so are not suited tor for complying with the law frequency meters specialty designed h have been found by the bureau ot of standards lo 10 change their calibration without ut frequent rec during the capt four months 43 4 broadcasting stallions stat have requested calibration of azo oscillators at the bureau bil reau twenty one other hae ha ve sought ca calibration libratto a of frequency meters |