100MHz Phase Meter (T289E)

This 100 MHz bridge circuit was found in an American 1970s documentation. The supply voltages are not indicated, nor are the tubes.

| Haga click en la imagen para ampliar |

800 W triac control (CB20710E)
Found in documentation from the 1970s, this circuit for resistive loads uses a trigger...
Crystal Elemental Radio (CB18395E)
This simple receiver for listening on the phone was obtained in a 1960 documentation. The circuit is...
AC Switch with DC Triggering (CB26125E)
This circuit was found in the 1989 Radio Electronics Experimenter edition. The circuit has the...