PURPOSE: To suppress limiter noise and to prevent a screen from disorder even if standard time recording and long time recording are switched each other by setting up the superposing ratio of a luminance signal component of a video recording current to a chrominance signal component almost equivalently at the standard recording time and the long time recording.
CONSTITUTION: A Tr switching circuit block 32 for reducing a recording current level is connected to the outputs of color signal and recording current adjusting volumes 29, 30 through resistors R3, R4 respectively at the long time recording, so that DC level of the input signal 31 is increased at the long time recording and the Tr is conducted. At the standard time recording, a luminance signal recording current is adjusted to the optimum recording current of a standard time magnetic head by the volume 29 and the chrominance signal is adjusted at its level by the volume 30 to suppress the generation of noise. At the long time recording, R3, R4 are selected becase of the conduction of the block 32, so that the ratio of the luminance signal recording current can be automatically set up to color signal recording current of the optimum recording current of a long period magnetic head and the chrominance signal recording current can be automatically set up to almost the same ratio as that of the luminance signal recording current to the chrominance signal recording current at the standard time recording.
ABE SHINOGU