KB9VBR-Slim-Jim-VHF-Ham-Radio-2-meter-Antenna
KB9VBR-Slim-Jim-VHF-Ham-Radio-2-meter-AntennaKB9VBR Slim Jim J-Pole AntennaKB9VBR Slim Jim Mounting

2 Meter Slim Jim Antenna

5.00 out of 5
(2 customer reviews)

$42.00

5.00 out of 5
2 reviews

Product Description

There are times when you may need more gain than the standard J-Pole antenna. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day communications.

I like to use my Slim Jim antenna for running emergency weather nets as the increased gain gives me a nice strong signal into the repeater and also makes it easier to capture weak stations on simplex if I need to listen to them on the repeater input frequency.

The difference between a J-Pole and a Slim Jim is simple: while both share the same design, the Slim Jim folds another 1/2 wave element over onto itself, turning the single half wave concept of the J-Pole into a double half wave, or ed fed folded dipole antenna. The folded dipole nature of the Slim Jim gives you about 3dbi of extra gain when compared to the standard J-Pole.

Benefits

  • Increased gain: compared to a standard J-Pole the Slim Jim has about 6dbi of gain
  • More RF energy aimed at the horizon: with a take-off angle of about 7 degrees for the Slim Jim, compared to 20 degrees for the J-Pole
  • Compact size: the 2 meter Slim Jim is still only 58 inches tall
  • Hear weaker stations: lower noise floor than a wire antenna will help you hear more and capture distant signals better.

Specs

  • 58 inches tall, end-fed folded dipole design
  • Gain: 6 dbi, 7 degree takeoff angle
  • Bandwidth: 5+ Mhz
  • Pretuned to 146 MHz: Just connect the coax and transmit
  • Heavy duty construction out of 1/2 inch copper tubing

When would I choose a Slim Jim compared to a J-Pole antenna

kb9vbr 2 meter slim jim antenna

2 Meter Slim Jim antenna ready for service on W9HDG-10 Winlink Node

Both the Slim Jim and J-Pole are great antennas and I continue to recommend both styles of antennas for different situations. The J-Pole will excel at lower mounting heights, apartments, or limited space locations. It’s 20 degree takeoff angle makes it a great choice for people living in valleys or the base of mountain ranges. It’s even radiation pattern is great for communicating with satellites and the International Space Station.

The Slim Jim likes to be mounted high. My experience with it is that you want to get this antenna up at least 20 or 30 feet for it to really perform. The lower takeoff angle is great for simplex communications with handheld or mobile radios. The low noise floor is perfect for data and packet stations. If you live on the top of a hill, go for the Slim Jim.

Mounting

KB9VBR Slim Jim Mounting

Click to enlarge image

The 2 meter Slim Jim needs to be isolated from your mast. If you use a non metal mast you should be fine. The antenna does come with a mounting kit that consists of a length of PVC tubing and two hose clamps. You will need two additional clamps to attach the isolator section to the mast.

Mounting instructions for the KB9VBR Slim Jim Antenna.

The [Slim Jim] antennas arrived today. I hooked one up to my transmitter and VSWR meter. I am impressed with the flatness of the antenna over the frequency range. Thank you.   - Gerald Marsh 

Additional Information

Weight 3.5 lbs
Dimensions 58 x 5 x 2 in
Length

58 Inches tall

Gain

5 db, 7 degree take-off angle

Design

End-fed 1/2 wave folded dipole

Bandwidth

5+ Mhz from center frequency (146 MHz)

Construction

1/2 inch Type-M Copper tubing. Amphenol SO-239 connector

SKU: 2SLIMJIM. Categories: , , .

2 reviews for 2 Meter Slim Jim Antenna

  1. David Crawford
    5 out of 5

    :

    Mike goes the extra mile to make his customers happy.The Slim Jim I bought works great swr is 1.1 to 1.3 across band,hitting repeaters I couldn’t before, audio is lot sharper,used good low loss coax.Best 50 bucks I ever spent.Thanks Mike.

  2. Craig Douglas
    5 out of 5

    (verified owner):

    Excellent antenna! Living in Los Angeles County, I’m able to hit repeaters as far away as 225 miles in San Diego County. I’m often asked what kind of antenna I’m using when making contacts so far away. Having only got my Tech license a year and a half ago, it took no special skill on my part to install the antenna on my roof. Michael always has responded to my emails whenever I have a question. Very satisfied with this product and I will certainly buy another antenna again from Michael.

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