This circuit is from 1970 documentation. The SCRs are types of the era that can be replaced with 106 Series equivalents. The circuit is powered with 100 V dc.
This stage of audio power is suggested by the Hitachi Semiconductor Manual, using a complementary pair at...
This stage is intended to receive modulated optical signals, using as a receiver a photodiode....
This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in...