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 circuit in an American publication in 1973. The circuit generates a low frequency signal...
The L293 circuit is not common today. We found this circuit in the 1982 SGS linear integrated...
This circuit makes use of an uncommon integrated circuit. It can provide a power of 6 W when...