This 100 MHz bridge circuit was found in an American 1970s documentation. The supply voltages are not indicated, nor are the tubes.
The integrated circuits used in this 1989 project are uncommon today, including the IF coil that...
Texas Instruments Standard Operational Amplifiers Texas Instruments makes available through Mouser...
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that...