Circuit diagrams for radio amateurs
How to build Amplified Ear - circuit diagram
21.03.2016
| Audio
Circuit diagramParts:P1 22K Log. Potentiometer (see Notes)R1,R9 10K 1/4W ResistorsR2 1M 1/4W ResistorR3 4K7 1/4W ResistorR4,R7 100K 1/4W ResistorR5 3K9...
A Balanced Output Board For The Stereo DAC
01.04.2016
| Audio
This add-on board is designed to provide a pair of balanced audio outputs for the High-Quality Stereo DAC (Digital to...
Vertical loop antenna (LOOP)
25.03.2015
| Shortwave antenna
According to my observations, the antenna is the "Windom" is rarely used by Amateurs. However, due to the lack of...
The five element YAGI on 20 meters
21.03.2015
| Shortwave antenna
Independent production of the antenna is not an easy task for Amateurs. Often the authors of the various antennas...
How to build Time Delay Relay II - circuit diagram
20.03.2016
| Clocks, timers, relays, load switches
DescriptionWhen activated by pressing a button, this time delay relay will activate a load after a specified amount of time.
