[A-DX] Sudan Radio (40 Hz Hum)

[Roger]

Am 14.04.2019 um 13:41 schrieb Roger:
> direct streamrip  1054-1114z:
> https://www.dropbox.com/s/oarv8qvml5rs9xz/2019-04-14_1054-1114z_OMDURMAN_ID-1102z-.mp3?dl=0 
>
>
> acoustic fingerprint of the recording:
> https://www.dropbox.com/s/dt5ee7n6xkisfch/2019-04-14_1054-1114z_OMDURMAN_ID-1102z-.png?dl=0 
>
>


Hum @  40 Hz:

https://en.wikipedia.org/wiki/Utility_frequency#40_Hz_origins

Frequencies in use in 1946 (as well as 50 Hz and 60 Hz)
Hz     Region
25     Canada (Southern Ontario), Panama Canal Zone(*), France, Germany, 
Sweden, UK, China, Hawaii, India, Manchuria
40     Jamaica, Belgium, Switzerland, UK, Federated Malay States, Egypt, 
West Australia(*)             <=== 40 Hz  Egypt   ("near" Sudan)
42     Czechoslovakia, Hungary, Italy, Monaco(*), Portugal, Romania, 
Yugoslavia, Libya (Tripoli)
43     Argentina
45     Italy, Libya (Tripoli)
76     Gibraltar(*)
100     Malta(*), British East Africa



roger