This is Magnetic Head Preamplifier Board.
Adopt TA7668 magnetic head recording and playback special chip design, vintage tape machine, cassette head magnification dedicated. With CXA1332 Dolby noise reduction.
Dolby B and C are tape noise reduction systems used to reduce the "hiss" produced by tape recordings and expand the dynamic range. The difference is that the B-type noise reduction system can reduce noise by 10dB, and the C-type noise reduction is 20dB.
Type B/C Tape Options:
K2: Jumper cap on the left - Type B
Jumper cap on the right - Type C
The Connection Sequence of Each Function Board:
Magnetic head -- Preamplifier -- Dolby noise reduction board -- Power amplifier board
Working Voltage: AC 9V-12V or DC 10V-13V (Power supply according to motor voltage, but switching power supply cannot be used, there will be interference.)
Board Size: 85mm x 50mm
Packing List:
1pcs x Magnetic Head Preamplifier Board
2pcs x Signal wires