Harmonic Distortion Meter (CB26187E)

This complex circuit was found in the 1993 edition of the Electronics Experimenter's Handbook. Most of the components are still common today.

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FET Preamplifier and Mixer II (CB17193E)
This second mixer version is an improvement on CIR10339 using independent FETs for the inputs. The number...
Low Deviation Thermocouple Amplifier (CB3940E)
The deviation of characteristics of this circuit normally referred to the temperature is very low....
FSK Circuit with 4046 (CB25770E)
This modem circuit using a 4046 PLL was found in the October 1994 issue of Electronics Now. The...