Matching antenna (CB7458E)

The coil and sockets of this circuit found in a QST depend on the frequency band that is intended to be tuned.

High impedante circuit for sensor (CB20542E)
This circuit for PC and which can also be used with microcontrollers was found in an English...
567 Two-Tone Decoder (CB25791E)
This two-tone decoder has a bandwidth of 24%. The circuit is from a 1994 Electronics Now. The...
Wien Bridge Oscillator with the LMV321 (CB4745E)
The LMV321 is a low voltage operational amplifier from ON Semiconductor. The following diagram,...