For the 1 MHz frequency, the pass band of this filter is only 120 Hz wide. The filter is suitable for telecom applications and its impedance is 600 ohms.
We found this project in a 2002 documentation. The transistor amplifier has a power of a few watts...
This circuit is from 1995 documentation. In the original, the source is symmetrical at 12 V, but...
Here we have a transceiver for the amateur radio range, which operates in the 40 m band (7 MHz),...