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Reviews Categories | Antenna Tuners/Matching Networks | MFJ-907 Variable RF Transformer Help

Reviews Summary for MFJ-907 Variable RF Transformer
MFJ-907  Variable RF Transformer Reviews: 2 Average rating: 4.0/5 MSRP: $59.95
Description: Multi-tap variable RF transformer matches low impedance (2-50 Ohms) of mobile antennas (ham sticks, screwdrivers, etc.) to 50 Ohm transceiver. 11 impedance ratios. Use in reverse to transform high impedances to 50 Ohms. Handles 1000 Watts. 1.8 to 30 MHz. SO-239 connectors.
Product is in production.
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G3UEQ Rating: 3/5 Mar 13, 2015 15:25 Send this review to a friend
Great for mobile matching  Time owned: more than 12 months
Would have made my own but was in hurry and got this unit, matches my G-Whip mobile antennas very well, however failed after 1 month, took it apart and usual MFJ quality control problems, earth tag had not been soldered properly!, also fitted by-pass switch so you did not need to unscrew connectors to check basic resonance before applying correction. Switch also bad quality and was not even screwed tight. Having rebuilt it quite a useful unit!
KW6LA Rating: 5/5 Jan 17, 2009 17:27 Send this review to a friend
Neat Item for Mobile  Time owned: 0 to 3 months

Donít throw it at the wall just yet ! I went thru the same drill last night and had a thought ! !

K0BG Allen , has been tutoring me too and remember that most antennas are made longer

to see the 50 ohm match. By change it with the transformer, look for the match up the band.

It may be some where else for I have not play with this little gem very long. You really need the

MFJ 259 B to watch the reactance go very close to zero before using the 907 box. Then every thing

jump some where else. At this point you re-tune the stinger to the part of the band you wish to operate.

I have a Bugcather on 40 mtrs that shows 20 ohms. Letter ( F ) brought it to 1.2 VSWR / 52 ohms and

the reactance of < 2 >. I have to credit Allan for getting me on track with the mobile technology. I should of scored it 4.5 for the mushy switch, but that's MFJ for you !

Best of Luck, es 73's

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