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珠波900型放像机,由于音控磁头磨损,伴音含混不清,音量也小。笔者在其射频调制盒音频输入端之前加装了一个线路放大器(见附图),恢复了该机的节目带伴音质量,不影响原机任何性能。整个电路只有八只元件,其中R_1和C_1对中高频信号加以提升,以提高伴音的清晰度。此电路可焊装在一小块印刷电路板上,焊上引出线后用透明胶带密封即可。本电路对其他老旧录放像机重放伴音音轻的恢复同样非常有效。对于不同电源电压的机子,只要更改
Pearl 900 player, due to audio head wear, sound ambiguous, the volume is small. The author installed a line amplifier (see photo) before the audio input terminal of the RF modulation box to restore the sound quality of the program with this machine without affecting any performance of the original machine. The entire circuit has only eight components, including R_1 and C_1 on the high-frequency signals to be enhanced to improve the clarity of sound. This circuit can be soldered in a small piece of printed circuit board, the lead wire after welding with a transparent tape seal can be. This circuit is also very effective for restoring light tone recovery of older, older VCRs. For different power supply of the machine, as long as changes