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Reviews For: MFJ-407E Deluxe Iambic Keyer

Category: Keyers & CW Keyboards

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Review Summary For : MFJ-407E Deluxe Iambic Keyer
Reviews: 3MSRP: 99.95
Description:
Everything you need to send great CW from this MFJ Curtis Keyer™ -- easy access
front panel controls, all keyer modes, dot-dash memories, jam-proof spacing,
weight control, sidetone, built-in speaker and more. Speed, weight, tone and
volume controls, and tune, semi-auto and on/off switches are on the front panel.
A dual paddle key lets you use the iambic mode. In this mode, you can insert a dot
before a dash finishes or insert a dash before a dot finishes. Also, squeezing both
paddles generates alternating dots and dashes. This lets you send characters such
as C, K, and R with a single squeeze. It turns an inexperienced fist into a
professional. You can use the automatic mode with a single or dual paddle. You
automatically generate dots and dashes by pressing the paddle. You can switch
into a semi-automatic “bug” mode to generate dots automatically and dashes
manually. Or you can use a “straight key” and manually generate your own dots
and dashes. You get dot-dash memory, self-completing dots and dashes, jam-
proof spacing and instant start keying. Select Type Aor Type B keying to match
your sending style. Weight control lets you adjust your dot-dash space ratio to
make your signal sound distinctive to bust through pile-ups. It also lets you
compensate for the turn-on delay of your transmitter.
Has tune switch for tuning your transmitter or antenna tuner. RF proof. Built-in
speaker for sidetone. Keys solid state and tube transmitters. Use 9 volt battery or
110 VAC with MFJ-1312D, $15.95. Attractive black cabinet measures 53 /4x13
/4x43 /4 inches.
Product is in production
More Info: http://www.mfjenterprises.com/Product.php?productid=MFJ-407E
# last 180 days Avg. Rating last 180 days Total reviews Avg. overall rating
0034.3
N4GBL Rating: 2021-06-19
Great Keyer for the Price Time Owned: 3 to 6 months.
Great little keyer and does a terrific job. Highly recommend for the price. My only complaint keeping me from giving it a perfect score is MFJ does not include the cable that goes from the keyer to the transeiver. It came with the 12v power cord (I'm using the 9v battery option) but not the other one...why not!?
K2YWE Rating: 2019-01-30
Good function, build quality not so much. Time Owned: 0 to 3 months.
I've used an MFJ Grandmster 484 for many years. The 407E compares poorly in quality. The paint and overall build quality are poor. The cover holes on my new 407E are off so far that the cover sits 1/16" above the panel.

Functionally, the tiny control knob makes quickly setting to a particular speed very difficult, especially in the often used range of 25-35WPM. My keyer came with the jumper in the low speed position. I changed it to high speed and had to recycle power a few time for the change to take hold.

On the plus side, the 407E has excellent response to the single lever self-completing style of action I use, and I like that the weight control can go below neutral as well as above.

Overall the 407E is a good value for the price.

N5AB Rating: 2018-04-16
Works great for my purposes Time Owned: 0 to 3 months.
I'm still in the process of learning CW, and I wanted a simple iambic keyer so I could practice without hooking a dummy load up to my transceiver. This keyer has met my needs just fine, and has made it easy for me to practice. I like the fact that the side tone can be adjusted loud enough for me to hear. I have another keyer that I built from a kit, but unfortunately it's very difficult to hear the side tone without headphones.

I've used this keyer with several different paddles, as well as a straight key. It works great with all of them. The user's manual is available from MFJ's website, and I did not have any issues with configuration.

Everything is adjusted using knobs on the front, and there is no way to accurately get or set specific values. If you want your keyer set to precisely 25 WPM, using a 640 Hz tone, then you'll have to play around with the knobs and measure the results with some other method. However, this isn't a big deal for me, since I'm just using it for practice.

All in all, I would recommend this highly to anyone seeking to learn (or improve) CW.