This circuit generates signals for adjustments in FIs of 10.7 MHz. The transistors can be BC548 or equivalent. We found this configuration in a documentation from the 70s.
The transistors on this 1975 circuit can be BC548 and BC558. The circuit uses a symmetrical source...
This static switch or triac contactor was obtained from Philips 1969 documentation. The SCR is...
This oscillator for practicing code with a transistor was found in Popular Electronics. The...