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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 […]

ทำสายอากาศ รวบรวมข้อมูล 14/1/59

Open Stub Dual Band J-Pole Antenna

Open Stub Dual Band J-Pole AntennaPre tuned, easy to assemble , very use full for emergency communication


Freq 144~146 MHz/ 430~440 MHz

Gain 3 dBi

SWR 1:1.5

Power 1kW max

Longest element: 58 Inch

Weight: 1.5 Kg

Available with camouflaged bag

User-assigned image link

User-assigned image link

User-assigned image link […]

อุปกรณ์น่าสนใจ Diplexers & Triplexers

Comet CFX-324B $67.95 CFX-324B Manufacturer NCG Comet Model # CFX-324B Product Description Triplexer Band Pass 1.3-150MHz 200-320MHz 390-500MHz Insertion Loss 0.2dB 0.25dB 0.3dB Maximum Power (Watts) 600w PEP 600w PEP 600w PEP Isolation 40dB Connectors Output: SO-239 Low…

วิทยุเครื่องเดียว ไปออก 3 สายอากาศ หรือกลับกัน




Feed Point

Bandwidth กว้างมาก



Homemade 2M/440 J-Pole for $35

2m/70cm Dual Band J-Pole by KK4ICE

If you have any questions about this project, contact KK4ICE@ARRL.NET.

(Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer.)



Open Stub J-Pole

I’ve constructed a 144/440 Dual band Open Stub J-Pole Antenna.

I saw the plans for this on the internet (link to plans) by Allen Lowe (N0IMW). Since I had a Metal Fabrication background, I thought this would be an easy build.

I understand that everyone else in the world uses Metric, You […]

สายอาการ Super J

SUPER J-POLE FOR 435MHz The Super J-Pole antenna for 430 – 450MHz was constructed and used for FM simplex and repeater operation at my previous residence in Melbourne, Victoria from 2002 – 2007

  The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical […]

ทำสายอากาศ Discone

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