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Holidays vertical

The antenna seems to be working well. I found 40m extremely silent

post 09 Oct 2024


Antenna HF Portable Links

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Travel Antenna Details
This is a low cost homebrew two band travel antenna for 20 and 40 meters. It is based on the B&W Travel Antenna concept with a telescoping whip and a loading coil

Mobile Antenna Page
Most amateurs have become used to tuning for a minimum indicated SWR. This is meaningless in a mobile installation. WHY? An efficient mobile whip is unlikely to be 50 ohms

Making a 28MHz rubber duck for the FT817
The main component in this design is the supporting rod, which the wire is wound upon.The rod needs to be 530mm for the antenna, plus about 15mm, which is inserted into a PL259 for RG8 style coaxial cable

HF Mobile Installation BMWX5 Kenwood TS-480
HF Mobile Installation BMW X5 Kenwood TS-480 High Sierra Sidekick Hi-Q Accessories Diamond Brackets Custom Base Turbo Tuner


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