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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
post 30 Jan 2024
Spiral Top Loading of a Short Vertical

Projects_Homebrew Links

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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

Amateur Radio Projects Vector Network Analyzere
This is a homebrew VNA capable of both transmission and reflection measurements from 0.05 to 60 MHz, with about 0.035 Hz frequency resolution and over 110 dB of dynamic range

A Portable Station for 30 MetresI decided on the 30 metre kit, because 30m has less static in the summer months than 40m

Antan un analyseur d'antennes compact
The best analysis of an antenna, for a correct adjustment, is done at its feed point, without passing through the cable or the power line

Frequency counter up to 12 GHz
Lab bench device that counts signals from below 500mhz to above 12 ghz


Noise suppression with X-phase II

Noise suppression with X-phase II This device similar devices are known as QRM eliminators or noise killers, makes it possible

The K9AY loop antenna for 160 and 80m bands

The K9AY loop antenna for 160 and 80m bands You don't have the space to put up a 4 beverage antenna's, an ewe or a 4-square and want 'good ears' on 160 and 80m? no problems try a k9ay loop antenna

Microphone boom headset for the FT-897

Microphone boom headset for the FT-897 Boom length m. 5.24-fiberglass spreaders m. 2.95-loops dimensions m. 2.00 x 4.27 with 5.00 m