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write your own review of the MFJ-901B.
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MW0LDJ
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Rating: 5/5
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May 1, 2011 00:20
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MFJ-901B
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Time owned: more than 12 months
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Ive used this great little tuner for years after buying it from a box of 'Other' at a ham fayre in 2004. It will tune just about any antenna you care to throw at it where some of the much more expensive auto-tuners will give up and shut down, it even tunes down the zinc fencing that runs around our property. The only thing missing 'out of the box' is a bypass but its a 15 minute job to fit one from bits out of your scraps box.
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WA6MOW
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Rating: 5/5
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Feb 9, 2011 07:45
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great deal
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Time owned: more than 12 months
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Use it when my auto tuners can't cut it. I would never be without one. MFJ has provided me with great products for many years.j
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WB0FDJ
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Rating: 5/5
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Aug 24, 2010 17:13
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Simple and reliable
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Time owned: more than 12 months
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I've had mine for many years. It's beat all to heck, scratched, dented and at times ignored in a boxful of other "stuff". But it darn near matches anything, providing you know how to use it correctly. I still use it, today, with my new Jupiter. I also have a nice autotuner that I'm not using as much. It occasionally barfs and gives me some funny setting. With my 'ole reliable 901 I wrote down the settings for each band that I need them and it takes only a few seconds to QSY. It's bare bones and at times I wish for such extras as bypass, etc, but for the what I spent on it I've definitely got my moneys worth. Nice size too....
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AB3IY
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Rating: 5/5
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Aug 22, 2010 12:08
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good low power tuner
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Time owned: 6 to 12 months
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I use this tuner wit a ten tec corsair-it will tune anything-good deal for $99.00.easy to use and setup as well Rich AB3IY
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KA5S
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Rating: 3/5
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Sep 15, 2009 20:13
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Less expensive travel/backup tuner
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Time owned: more than 12 months
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I bought mine used. It is not especially efficient and under some conditions with 100 watts I saw noticeable heating of the chassis and cover. But until the advent of the very similar MFJ-902H it was among the smallest (relatively) inexpensive tuners available. The 902's toroid may be more efficient.
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N8QXE
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Rating: 4/5
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Jul 27, 2009 15:03
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Needs a Bypass
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Time owned: more than 12 months
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I have owned my 901B for over 14 years with no problems, I've used it in my shack and in the feild.
My 901B is currently my tuner for feild use with my FT-817, it's been scratched and dented a little, but still performs solid.
Only one drawback, no bypass switch.
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K6SDW
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Rating: 4/5
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Jun 11, 2009 07:22
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It works..
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Time owned: more than 12 months
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My backup tuner for when the Ten Tec dies (3 times thus far in 10 years!!) ....... it doesn't have the greatest range like the mega-$$$ tuners but it gets the job done when needed!
I definitely would be careful of home much power you run through it, less you like seeing smoke.
Cheers All
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K4PDM
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Rating: 3/5
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Jun 11, 2009 06:44
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Worth the money...
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Time owned: more than 12 months
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I used one of these mobile for a while. It is not very rugged and you 1. should make sure to tune at low power, and 2. make sure not to switch the inductor selector while transmitting. The balun is incredibly small, too. But it is worth the small price it sells for as long as you remember to baby it.
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OLLIEOXEN27
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Rating: 1/5
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Jun 9, 2009 09:23
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Little tuner from hell
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Time owned: 6 to 12 months
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I owned one of these for awhile. The connectors on the rear were so close together it was a pain changing from coax to balanced line. Then there was that extra jumper between balanced line and single line connectors - jeesh. Never could make many contacts. When I bumped the tuner or picked it up the SWR would change on my meter. Enough said.
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G7IGB
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Rating: 5/5
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Jun 4, 2009 05:58
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Great portable ATU
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Time owned: 6 to 12 months
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I got my MFJ-901B from a local radio rally last year and I've used it just about everywhere since. This compact HF ATU easily matches all my antennas, which include a G5RV, inverted L, OCF dipole and 66' long wire. I also find that the 901B will also match most of my antennas on 50 MHz, which is a real bonus as the ATU is not intended to cover the 6m band.
The impedance matching range is far greater than these modern 'auto tuner' units and its small size make it ideal for portable use. Overall I'm very happy with the MFJ-901B and I know of two other local amateurs who use this ATU as their main tuner, with no problems at 100W RF input power and various coaxial fed or long wire antennas.
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