The Homebrew Slim Jim Antenna Gain

mypapit — Tue, 10 Jun 2008 07:43:49 +0000

I’ve been searching for information regarding the radiation angle and the gain of slim jim antenna, but found none of it. So I decided to build the model of the antenna inside the ever useful MMANA-GAL software to get the information I needed myself.

From what I can surmise, the slim jim has a slightly lower radiation angle than vertical dipole antenna and is easier to mount, thus it is suitable to use for point-to-point communication VHF-UHF operation. It has a gain of about 2.8dBi-3.2dBi in free space and 4.8-5.8dBi when mounted at about 30feet from the ground. Here’s the result of MMANA-GAL :

Slim Jim mounted 30 feet above ground

Slim Jim in free space

Kota Setar Local Repeater Frequency (Gunung Keriang Kedah)

mypapit — Thu, 29 May 2008 17:48:10 +0000

Here’s the detail of Kota Setar Amateur Radio Repeater Information :

Frequency : 145.525 MHz
Shift : – 0.600 MHz
Tone : 103.5

Apart from the surrounding Kota Setar area, the repeater is triggerable from Perlis, Langkawi and Sungai Petani, the repeater was erected and maintained by Kota Setar Amateur Radio Club

All licensed ham are welcomed to use this repeater.

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The Homebrew Slim Jim Antenna Gain

Kota Setar Local Repeater Frequency (Gunung Keriang Kedah)