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3 element yagi for 11 meter


3 element yagi for 11meter with control swr system harpin
post 28 Jan 2024
3 element yagi for 11 meter

Antenna CB 27 MHz Links

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HB9CV 2 elem. 27.000 mhz
The HB9CV antenna or Swiss antenna is a fully fed antenna with two elements in the form of two unequal length dipoles

HB9CV 2 element yagi for 11 meter
The idea is to get an small antenna, this is a great solution. The HB9CV antenna is smaler than a 3el. conventional Yagi but you get the same gain and caracteristics

How does a CB radio antenna work?
CB portion of the spectrum begins at 25.01 megahertz, so a full wavelength antenna would be a bit more than 39.34 feet long

How to build a SWR meter for 27 mhz
The transformer is made of 3 copper lines on a PCB, each of them 65mm long


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