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Reviews Categories | Keyers & CW Keyboards | MFJ-401D Help

Reviews Summary for MFJ-401D
MFJ-401D Reviews: 12 Average rating: 3.5/5 MSRP: $49.95
Description: Budget Electronic Keyer
Product is in production.
More info: http://
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JOHN_HOOVER_EX_WK7W Rating: 2/5 Nov 23, 2001 19:38 Send this review to a friend
Don't Buy it  Time owned: 0 to 3 months
I just purchased this keyer, and I've noticed that when sending dashes, sometimes an extra "dit" is inserted. The reproducible scanario is that I will send a W character "dit dah dah" several times, and about every third W will sound like AA or "dit dah dit dah." The second "dit" is inserted by the keyer without any contact to the dit pole of the paddle. This happens reliably but somewhat arbitrarily. I tried different paddles and other 407D's and it happens always. I've been a high speed cw op for years and never had such an issue with other keyers. At extremely slow (5WPM range) speeds it doesn't happen. I firmly believe this keyer has an inherent design flaw in the packaging which is causing subtle noise/coupling problems. Got my money back.

W8KQE Rating: 2/5 Sep 30, 2001 11:33 Send this review to a friend
Lousy Keyer!  Time owned: 0 to 3 months
Using and adjusting this keyer was an exercise in frustration! I returned it after a few days of messing with it. Even after extensive internal adjustments (as described in the manual), sending seemed very tedious and unatural, given this keyer's propensity to add unwanted time delay to the sending process. I don't know if this is a design flaw, or some kind of unit defect. I have had NO problems with the built in electronic keyers on my IC-756 and IC-718, but this external keyer (which I bought to key my IC-725) failed to deliver in a big way! MFJ really needs to user test their products more comprehensively before selling them. DISSAPOINTED.
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