This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz signals are now received on a medium wave radio at 1 MHz.
This is the transmitter of the transmitter of a micro remote control that appeared in the November...
This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s...
August 2016 - It can be obtained from Mouser Electronics the new operational amplifiers series...