78 rpm: Difference between revisions
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:See also [[tango.info 78rpm]] | |||
By 1925, the 78 rpm was becoming a standard for [[gramophone records]]. The exact speed depended on the frequency of the alternating current electricity supply. For countries with 60 Hz it was 78.2608696 rpm, the speed of a 3600 rpm synchronous motor reduced by 46:1 gearing. For countries with 50 Hz it was 77.9220779 rpm, the speed of a 3000 rpm synchronous motor reduced by 77:2 gearing. | By 1925, the 78 rpm was becoming a standard for [[gramophone records]]. The exact speed depended on the frequency of the alternating current electricity supply. For countries with 60 Hz it was 78.2608696 rpm, the speed of a 3600 rpm synchronous motor reduced by 46:1 gearing. For countries with 50 Hz it was 77.9220779 rpm, the speed of a 3000 rpm synchronous motor reduced by 77:2 gearing. | ||
Revision as of 2011-03-28T12:28:45
- See also tango.info 78rpm
By 1925, the 78 rpm was becoming a standard for gramophone records. The exact speed depended on the frequency of the alternating current electricity supply. For countries with 60 Hz it was 78.2608696 rpm, the speed of a 3600 rpm synchronous motor reduced by 46:1 gearing. For countries with 50 Hz it was 77.9220779 rpm, the speed of a 3000 rpm synchronous motor reduced by 77:2 gearing.
- two albums with same audio and same album number, but
- different label colors and different performer names: Odeon 4109
- Odeon 5604 different composition names
- one album but A+B different appearance
- 02480002713227 victor 38666
- two albums with same number but different compositions
- Victor 37122
- http://www.tango.info/02480002713616 Se Fué Sin Decir Adiós | Mar De Fondo
- http://www.tango.info/02480002713364 Intimas | Mar De Fondo
- Victor 37122