Negative Ion Generator (CB25366E)

We found this voltage multiplier circuit in a Radio Electronics magazine from December 1991. The high voltage transformer is an adapted flyback

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Basic Wiretapping (CB19322E)
In the figure we have a wireless wiretapping circuit for the frequency range determined by L1. For FM...
Voltage Follower (CB20164E)
This voltage follower or amplifier with unit gain uses an unusual operational amplifier nowadays. The...
Cardiac monitor (CB7968E)
Found in a 90’s Electronics Now, this circuit has its output connected to an audio amplifier. The...