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HB9CV-Antenna for 2 m 6 m and 10 m


When compared to two-element antennas of conventional design, it can be assumed that the HB9CV gain of approximately 4.2 dBd 1 is about the same as that of classic beam / reflector and radiator / director combinations
post 27 Mar 2024
HB9CV-Antenna for 2 m 6 m and 10 m

Antenna for UHF VHF Links

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Dual Band Half-Wave Flower Pot Antenna
The Flower Pot antenna can be readily modified to dual band

2 meter ssb yagi plans for sideband fun
Optimized using 144.250mhz as the center frequency which is in the middle of the SSB portion of the 2 meter band

2 Meter Slim Jim Antenna
This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead

Vhf and Uhf Flowerpot Antenna
The antenna is constructed from rg58/u coax 22mm plastic plumbing

Diy a helical antenna for 432-435
diy a 14-turn home-made helical antenna for 432/435mhz


23cm Yagi Antenna building

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

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

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