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Reviews Categories | QRP Accessories | MFJ-1899T w/bnc HF vertical antenna Help

Reviews Summary for MFJ-1899T w/bnc HF vertical antenna
Reviews: 1 Average rating: 4.0/5 MSRP: $79.95
Description: This is a 6 to 80 meter telescopic antenna
Product is in production.
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KU3X Rating: 4/5 Sep 8, 2016 08:04 Send this review to a friend
So far so good, minor issue  Time owned: 0 to 3 months
After watching a YouTube video on this product I decided to get one. But before I put it into full service I figured Id make a few basic tests.
I made a mount for the antenna and clamped it to my wooden picnic table. I tested each band and used one MFJ suggested length radial per band. I tested one band at a time and had only one radial attached at a time. I used the Rig Expert AA-600 to take readings. I also added a current balun at the feed point.

I got the SWR down to 1.3 to 1 on 15, 20 and 40 meters. It was a tad higher on 10 meters but still very usable on 10. I am still trying to get a match on 17 meters with no success so far. I am not saying it wont work on 17, I just did not find the right combination just yet.
The main reason I posted this review is to point out that tap #2 is incorrect for 20 meters. Way too much base loading inductance. It should be tap #3.
So far, here are my findings for the bands I tested:
7040 Tap #2, whip 45 and radial 25"6"
14144 Tap #3, whip 43" and radial 12"10'
21100 Tap #4, whip 48" and radial 8'6"
28100 Tap #5, whip 39" and radial 6'6"

I dont expect to work the world with this antenna, but I do plan on having many hour of fun with it and my KX2.

Barry, KU3X

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