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 is from a Popular Electronics of December 1993. In it we have the way to externally connect...
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....
Based on the Linear Technology LTC2054, this -48 V circuit was found in a 2005 manual. The circuit is...