This signal amplifier for ATV in the 427 to 439 MHz band was found in a magazine 73 for radio amateurs of the 90's. The circuit is installed next to the antenna on the mast itself.
When the illumination decreases, this multivibrator starts up, causing the lamp to blink at a...
Found in Radio Electronics, this simple indicator circuit uses general-purpose transistors common today....
November 2016 - Mouser Electronics is makingToshiba's new TLP78x and TLP79x isolation amplifiers...