S-meter for receivers (CB7926E)

The S-meter is a signal strength meter used in communication receivers. This circuit was found in a 303 Circuits from the 90s, European publication.

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30 to 45 MHz Receiver (CB20514E)
Used by the police this receiver tuned to the low VHF band. The circuit is from a documentation from the...
Field Intensity Meter (CB12832E)
This circuit, for bands above 15 MHz, was found in an Argentine publication from the 1970s. The L1...
20 kHz band pass filter (CB9778E)
Found in documentation from the 1980s, this circuit can be used with other operational ones. The...