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Author Topic: Duplexer OR Diplexer ?  (Read 2206 times)
W6AOA
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Posts: 36




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« on: November 30, 2011, 12:09:13 PM »

I have an old kenwood TM731a. This radio has two seperate SO-239 connectors on it and I have a dualband "J-pole antenna" for 2 meters and 70 cm.   Can anyone tell me what I need and how I can possibly build one.   TNX W6AOA

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KG4NEL
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Posts: 443




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« Reply #1 on: November 30, 2011, 02:45:38 PM »

I have an old kenwood TM731a. This radio has two seperate SO-239 connectors on it and I have a dualband "J-pole antenna" for 2 meters and 70 cm.   Can anyone tell me what I need and how I can possibly build one.   TNX W6AOA



Unless you really feel the need to build one: http://www.rffun.com/catalog/hamantm/cduplex.html

The CF-416A would be what you'd need for that radio.
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NA4IT
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« Reply #2 on: December 01, 2011, 05:56:29 AM »

For the homebrew version, you might look at http://www.qsl.net/ve3rgw/uvdup.html.
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K1CJS
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Posts: 6061




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« Reply #3 on: December 01, 2011, 07:16:21 AM »

I have an old kenwood TM731a. This radio has two seperate SO-239 connectors on it and I have a dualband "J-pole antenna" for 2 meters and 70 cm.   Can anyone tell me what I need and how I can possibly build one.   TNX W6AOA

A duplexer is for running two different frequencies on the same band off one antenna.  Duplexers are usually used for repeater operation. 

A diplexer is for connecting two different band radios to one dual band antenna--or for connecting two single band antennas to a dual band radio.  Keep in mind that both have to be for the specific bands that you're using.
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