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21 to 30 MHz Mobile/Portable Antenna
The antenna consists of two sections. The bottom half which is a fibre glass tube with the loading coil and at its base has a standard 3/8" UNF thread, and the top half which is a stainless steel whip
post 29 Jan 2024
Antenna HF Portable Links →
An HF Mobile Antenna
This antenna is what I call a Variation on a Theme because it has been built and written about many times in many different configurations. This just happens to be the way I built mine
AS3900 SINCGARS Vehicle Mount Antenna
The Military calls it broadband Vehicular Whip Antenna it is certainly that Broadband
Center loaded mobile HF vertical
All antenna knowledge I obtained says me that the shorter the antenna the more I will have to deal with low radiation resistance and lower efficienc
Construction of a balcony antenna for Hf
I wound 2 wires with a diameter of 1.6 mm copper at the same time on a PVC tube with a diameter of 75 mm and a length of 180 mm
DK3 Screwdriver Antenna
The DK3 is probably the best mobile antenna for hf. It is also well known as the screwdriver antenna. It works on all hf bands 10m-160m without changing the whip
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This antenna is what I call a Variation on a Theme because it has been built and written about many times in many different configurations. This just happens to be the way I built mine
The Military calls it broadband Vehicular Whip Antenna it is certainly that Broadband
All antenna knowledge I obtained says me that the shorter the antenna the more I will have to deal with low radiation resistance and lower efficienc
I wound 2 wires with a diameter of 1.6 mm copper at the same time on a PVC tube with a diameter of 75 mm and a length of 180 mm
The DK3 is probably the best mobile antenna for hf. It is also well known as the screwdriver antenna. It works on all hf bands 10m-160m without changing the whip
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