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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

ที่มา: http://www.theantennafarm.com/catalog/duplexers-diplexers-triplexers-1175/diplexers-triplexers-477/triplexers-479/

[…]

Three-Element-Collinear-J-Pole

Feed Point

Bandwidth กว้างมาก

ที่มา: http://www.4x4ham.com/showthread.php?3019-Improved-2-Meter-Performance-with-a-Three-Element-Collinear-J-Pole

[…]

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.)

ที่มา: http://www.kk4ice.com/?page_id=20

[…]

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 […]