This circuit is from a 1975 RCA tube manual. It appears elsewhere on the site. R5 depends on the voltage of the amplifier with which it is used and can be changed.
This transceiver circuit was found in a 1997 documentation. The circuit operates in the 80 meters...
We found this circuit in the Linear Applications Handbook published by National Semiconductor in...
The configuration presented below was obtained in the Linear Application Handbook of the National...