High-Low Sensor (MEC180E)

Figure 1 - High-low sensor.

Multitone Generator (CB25089E)
This small tone generator was found in the November 1987 issue of Radio Electronics magazine. The...
Cardiac Monitor (CB10961E)
This circuit was found in a 1987 magazine. It measures monitors the heartbeat through a...
70 MHz FI amplifier (CB14817E)
This circuit is used in VHF and UHF superheterodyne receivers. The circuit is from the 1964 RCA...