This preamplifier for the 6 or 2-meter range was obtained from an American documentation from the 1980s. FETs can be modern equivalents and no information about the coils is given.
We found this power supply in the 1982 SGS Linear Integrated Circuits manual. The L296 is not...
This circuit monitors the voltage of a 12 V battery. The indicated levels let you know if the...
Suggested by Motorola documentation from the 1980s, this circuit can be implemented with...