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You can
write your own review of the MFJ-915 RF Isolator.
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K9DTH
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Rating: 5/5
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Jan 16, 2012 12:49
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It works
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Time owned: 0 to 3 months
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I constructed a ocf dipole but my tuner would not tune the cw portion of 80 meters. I ordered the mfj 915 isolator and installed it close to the rig, in line with the coax and now my tuner will tune from one end of 80 to the other. I also noticed that there is less band noise. I am very pleased
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KE5PDM
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Rating: 5/5
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Feb 18, 2010 19:45
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RF problem solved!
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Time owned: more than 12 months
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My Motor Home steps would retract at times. The XYL was not very happy after the second nose dive in dark with no steps!!! Installed two of the MFJ-915, one at either end of transmission Coax and problem solved. Great product, buy a spare! As I recall, this is not a transformer(Balun or Unun). It consists of a of row of Ferrite beads.
I use them on G5RV, DiPoles and Vertical.
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K7JBQ
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Rating: 5/5
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Feb 18, 2010 17:40
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problem solved
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Time owned: more than 12 months
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The rig would hang up on CW on 40 meters at power levels above about 20 watts (condo station/balcony antennas). Inserted the 915 at the rig end of the feedline. Problem solved.
73,
Bill
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OE3SGU
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Rating: 5/5
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Mar 22, 2009 13:09
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cheap solution
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Time owned: 0 to 3 months
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I had RFI problems with my indoor setup at the city condo. to work 40 meters was impossible without reducing the power to qrp-level. after installing the MFJ-915 the problems are gone and I can work "QRO" without getting burned.
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OE5BFM
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Rating: 5/5
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Sep 12, 2008 15:17
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Helps really!
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Time owned: 0 to 3 months
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At time I can only use a wire with 40 feet and 2 Radials with abt. 12 feet in the attic. To get better impedance I use a Unun 1:9. The tuner is a MFJ-945e.
This "antenna" works not so bad as I suspected, but I had a lot of RF in the shack, e.g. on the case and microphone of the rig. Especially on 40 and 80 Meter the RF sometimes hurts on the lips, hi.
So I tried this MFJ-919 RF Isolator and I was really impressed! No RF in the shack and the efficiency of this antenna gets noticeable better.
So I recommend this unit.
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