Found in Popular Electronics, this sophisticated short-wave receiver requires a lot of skill from an eventual assembler. The coils are commercial types of the time, used in commercial radios.
This circuit generates signals that depend on Ct and the 10k trimpot adjustment. See the math...
This circuit was found in a 90s 303 Circuits. The circuit operates in a 200 Hz switching mode and...
The circuit presented was obtained in a technical documentation from National Instruments. The...