Circuit diagrams for radio amateurs
The telephone interface
29.03.2015
| Telefonie
We offer different compared to published in [1]. phone interface. It is designed to connect simplex radio station with the...
Radio 144 MHz
14.07.2015
| Radio transmitters
Radio 144 MHz is used for operation in the Amateur radio band 144 MHz. This radio is narrowband frequency nodularia.
DescriptionAlmost all 24V power systems in trucks, 4WDs, RVs, boats, etc, employ two series-connected 12V lead-acid batteries. The charging system...
Parametric Converter
22.08.2015
| Mixers, frequency converters
In modern communication LW receivers often use an intermediate frequency of tens of megahertz (so-called "up conversion"). The advantage of...
30 minutes operation, Blinking LED signals 6 last minutes before turn-offThe purpose of this circuit is to power a lamp...
