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Building a Coaxial Collinear Antenna
The Coaxial Collinear is rarely mentioned, It's design is super simple and since it needs no radials, it takes up little horizontal space its weight is negligible
post 15 Sep 2024
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CW Squeeze Keyer Input Adapter
Cw squeeze keyer input adapter based on the msk-5
Simple qrp equipment
These simple circuits and rigs can give you much fun: home brewing, portable activities during holidays
Spiral Top Loading of a Short Vertical
A spiral coil was constructed on a form composed of 69mm OD plastic drain-pipe and 15 plastic radials
St.Tomass Wi-Fi Antenna
Modifica di un'antenna commerciale uso WIFI
Semplice misuratore di campo
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Cw squeeze keyer input adapter based on the msk-5
These simple circuits and rigs can give you much fun: home brewing, portable activities during holidays
A spiral coil was constructed on a form composed of 69mm OD plastic drain-pipe and 15 plastic radials
Modifica di un'antenna commerciale uso WIFI
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground