High quality stereo HI-FI combo amplifier 03

(3) Active servo power
supply     The active servo power supply is a high-performance power supply developed by Panasonic, as shown in Figure S-79. This active servo power supply can
be used to power the audio circuit part of the laser record player and the dual deck. The performance of the active servo power supply is excellent and the effect is
better than the battery. During actual operation, the voltage stabilizing integrated circuit such as 7815/7 915 can be replaced with voltage stabilizing integrated circuits with other voltage stabilizing values ​​such as 7809/7909
, 7812/7912, etc. In order to facilitate the use of toroidal transformers, it is designed as a double-bridge rectifier. If you use an ordinary
three-tap transformer in the circuit, you can only use four diodes VDl.VDZ and VD3.VD4. The ring transformer can be about 25w.
This active servo power supply can be used directly to power the aforementioned head amplifier and tone controller. powered by.