Tuned active antenna (CB8412E)

Found in a 90s Popular Electronics, this circuit allows to select the operating ranges between short waves and VHF. MOSFET is uncommon today.

| Clique na imagem para ampliar |

Electronic Fuse (CB10445E)
This circuit was published in an Italian magazine Radio Elettronica in February 1976. The...
35 to 5 V symmetrical converter (CB8176E)
Found in a Popular Electronics from the 90's, this circuit converts a 40 V symmetrical source to a 5...
Selective tone decoder (CB3957E)
This high selectivity circuit for single tone decoding was found in 1970s documentation. The coil...