This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
This circuit, extensively explored in this section and in circuits on this site, is recommended to...
I found this circuit on a December 1976 Radio Elettronica. The Italian magazine no longer exists, but...
We found this circuit in an American documentation of the 80's, being indicated for the test of...