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Dipole for 20 and 40m bands
By experience, I have noticed that a 20m band dipole antenna must be elevated by at least 8m above ground to perform well
post 28 May 2024
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A multi-band inverted-V dipole for portable operation
This form of inverted-V allows multi-band operation with one antennafrom portable locations
A Small Garden Antenna
Spacers made from glass fibre sheet cut into strips was used, each 6 inches long. The parallel antenna wires are secured with wire wraps
All band dipole Mk2
The All Band HF Doublet is often referred to as a random length dipole as it is generally as long as the available space within reason, but here are a couple of limitations to the ultimate dipole length
Improvement of a long wire antenna
Spectacular noise reduction thanks to this balun, which is very simple to make using drawer bottoms
Extended Double Zepp Antenna
Install a 4:1 current balun on the end of the 450 ohm latter line stub
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This form of inverted-V allows multi-band operation with one antennafrom portable locations
Spacers made from glass fibre sheet cut into strips was used, each 6 inches long. The parallel antenna wires are secured with wire wraps
The All Band HF Doublet is often referred to as a random length dipole as it is generally as long as the available space within reason, but here are a couple of limitations to the ultimate dipole length
Spectacular noise reduction thanks to this balun, which is very simple to make using drawer bottoms
Install a 4:1 current balun on the end of the 450 ohm latter line stub
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