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MFJ998 auto tuner

Oct 15th 2012, 10:16


Joined: Apr 8th 2011, 18:03
Total Topics: 0
Total Posts: 0
Can anyone tell me how to adjust the mfj998 tuner so that it will tune the 160 mtr band. I've looked in my manual and don't seem to find the part that tells how to do that. The tuner is suppose to tune it but as it came from MFJ new it want do that.
wi5d Thanks
Oct 15th 2012, 14:10


Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0

This article by Phil AD5X explains that a tuner with only 25 uH of inductance needs a vertical to be at least 80 feet long--he shows how to add another 30 uH for matching a 43 foot vertical to 160 meters.

Zack Lau W1VT
ARRL Senior Lab Engineer

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