This circuit was found in a British documentation from 1969. It can be implemented with modern transistors. The pass band is 6 MHz.
This linear bargraph circuit was found in the February 1992 issue of Radio Electronics magazine. The 10...
November 2016 - NXP ARM Cortex microcontrollers for serial interfacing applications, NXP 32-bit...
Used by the police this receiver tuned to the low VHF band. The circuit is from a documentation from the...