This 100 MHz bridge circuit was found in an American 1970s documentation. The supply voltages are not indicated, nor are the tubes.
Another interesting way of generating signals with small active cycles, that is, short pulses, is by...
Motors up to 2 A DC can be controlled by this circuit that we find in the manual for linear...
This light intensity meter is from a 1978 Texas Instruments optoelectronics manual. The...