The signals from this circuit obtained from the 1965 Radio Shack documentation are picked up from a medium wave receiver. L1 and L2 have 80 to 100 turns of yarn 28 on a ferrite rod.
This circuit enables the bilateral command of triacs with the use of low current switches. The...
The figure shows a way to apply gain control to the LM3600 OTA. The circuit is from a Radio...
This configuration was found in a 1990s documentation. Modern operational amplifiers can be used...