| 摘要 |
PURPOSE:To supply a stable power source and erasing signal to recording and reproducing amplifiers and a rotary erasing head by providing the recording and reproducing amplifiers and secondary side rotary coils which are connected to said recording and reproducing amplifiers and can be integrally rotated therewith. CONSTITUTION:The AC signal from an AC signal generator 50 is applied to a primary side stationary coil 42 of a rotary transformer from which the signal is transmitted as an AC signal P to the secondary side rotary coils 39 and is applied to an AC signal rectifier 48. The signal is then supplied to the power supply of the power supply of the recording and reproducing amplifiers 59, 60 and a recording signal detecting means 63. The recording and reproducing amplifiers 59, 60 are thereby put into an operation state. The reproduction signals from rotary heads 1, 1' are individually amplified by the amplifier 60 and are applied to the secondary side rotary coils 53a, 54a of the recording signal supply type rotary transformer in the case of the reproduction state. These signals are outputted to the corresponding primary side stationary coils 56a, 57a and are applied to the succeeding video signal processing circuit. The problems in the constitution such as execution of power supply to preamplifying means and the supply of the erasing signal to the rotary erasing head are thereby entirely solved. |
