We found this antenna amplifier or Booster circuit in an Electronics Now from the 90s. The circuit can be implemented with equivalent transistors like the BF494.
Found in a 1967 Electronic Design, this circuit can detect pulses as narrow as 0.2 us. Active...
We found this circuit in the May 1970 issue of Radio Electronics magazine. The maximum frequency...
This flasher was found in the September 1984 Radio Electronics magazine. The frequency is given by...