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Arduino Multiband Beacon

Arduino Multiband Beacon INTRO 144 MHz (2 meters) 432 MHz (70cm) 902 MHz TESTS MULTI-BAND Operation (successful) 5-BAND Operation (TESTING)




Broadband Multi-Wire ANTENNA BARRETT


This antenna consists of three wires connected at the both ends. In the middle of the central wire there is 50W 1250 Ohm resistor. External wires are cut in the middle, attached to isolators and feed through the balun.

Balun is wired on a ring shape ferrite core […]

HF Broadband Antenna

Broadband Antennas:

Diagram above: Broadband VertaLoop as described in this article. Wire loop supported by trees, Diamond BB7V Vertical Element with feedpoint resistive matching unit, “ground” radial wire, metal support pole, coaxial cable, ferrite feedline choke clamps, and grounding points.

Concepts and Construction of the Broadband VertaLoop Antenna Design and Installation Notes by […]

Antenna Tunner,5199.html


สายอากาศ 40m Delta Loop

– 40Meter delta loop – 2009.12.12 – Recalculated and adjusted each side to 13,59 meter. Made a new run with the miniVNA. The Loop works fine on 40/20 Meter band, and is ‘usable’ but not optimal on 15Meter. Here are the results:

DeltaLoop @ 40meter BAND

DeltaLoop @ 20meter BAND

DeltaLoop @ […]

สอนการใช้ key paddle ส่งรหัสมอร์ส

สายอากาศ HF

สายอากาศ multi-band ที่ใช้อยู่ เป็นแบบ T2FD (3.5-30MHz)

เว็บดูการแพร่กระจายสัญญาณ HF



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