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write your own review of the MFJ-1712.
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W9HAN
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Rating: 1/5
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Oct 24, 2008 20:10
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Great for VHF Marine
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Time owned: 3 to 6 months
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I put my MFJ-1712S onto my MFJ-269 analyzer and found the bandwidth to very broad and good VHF SWR at the "sweet spot" and horrible UHF SWR. Got SWR readings of about 1.8:1 at 155.350 and 3.1:1 at 418.250. Obviously, the frequency centers at the sweet spots are not in the HAM bands! Since the bandwidth is broad you can reach the 2M band at 2.0:1 SWR or so.
This is a good Marine VHF or MURS antenna, but I bought this antenna as a HAM dual bander as stated on the label.
I would not recommend this antenna to anyone due to the SWR centering, which indicates poor engineering and/or manufacturing. You need a club for each golf shot, but this antenna is like a wood #3 made of wood or a left handed club for a right handed golfer. The club needs to go! I will use it on my VHF Marine radio.
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WB6TNB
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Rating: 5/5
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Feb 17, 2008 13:39
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A great antenna for not much $$
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Time owned: more than 12 months
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I've had several of these for at least ten years. Kenwood used to make an identical antenna but when it was discontinued MFJ came out with the MFJ-1712.
I've used them on numerous amateur HT's and scanners and in all applications I get a very noticable increase in signal strength. Fully extended to 19 inches it's 1/4 wave on 2 Meters and 5/8 wave on 440. I've found that it provides some gain on 220 by partially collapsing the whip. It collapses to 7 1/4 inches and performs the same as a 2 meter rubber duck at that length.
I use two very local repeaters and when using the MFJ-1712 I can drop down to low power with no loss of signal strength. As a result my battery packs last a lot longer.
If you need more signal on the cheap this is the way to go. They make both BNC and SMA versions.
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KC2FTN
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Rating: 5/5
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Jan 6, 2007 21:11
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GREAT !
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Time owned: 0 to 3 months
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Reference station was about 4 miles away using a Diamond X-200A verticle, and a Kenwood 2-meter base radio. I was using a Radio Shack HTX-202 HT fully charged inside my house.
Stock rubber duck:
S2 on low power, S5 on high.
MFJ-1712 (collapsed):
S6 on low, S8 on high.
MFJ-1712 (extended):
Full scale on low, Full scale on high. (30/9)
This antenna works GREAT for me.
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