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MFJ Enterprises MFJ-557 Morse Code Practice Oscillator Untested Parts Only - Picture 1 of 6
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MFJ Enterprises MFJ-557 Morse Code Practice Oscillator Untested Parts Only

phoenixvtg
(1839)
Registered as a business seller
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US $35.00
Approximately£26.44
or Best Offer
Condition:
For parts or not working
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Postage:
Free USPS Ground Advantage®.
Located in: Phoenix, Arizona, United States
Delivery:
Estimated between Mon, 4 Aug and Sat, 9 Aug to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the delivery service selected, the seller's delivery history and other factors. Delivery times may vary, especially during peak periods.
Returns:
30 days return. Seller pays for return postage.
Payments:
    Diners Club

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eBay item number:376387367165

Item specifics

Condition
For parts or not working: An item that does not function as intended or is not fully operational. ...
Type
Oscillator
UPC
0702646177954

About this product

Product Information

The MFJ-557 is a Deluxe Morse Code Practice Oscillator straight key model developed by the MFJ Enterprises brand. It has a contact pushed to create and send the practice message, and it has dimensions of 3.75-inches by 2.75-inches, which makes it compact and easy to carry. The radio and communication device is handy in learning the coded language which is useful for sending short messages.

Product Identifiers

Brand
MFJ
GTIN
0702646177954
UPC
0702646177954
eBay Product ID (ePID)
1737650127

Product Key Features

Year Manufactured
Easy to use
Compatible Brand
For Icom, For Elecraft, For Realistic, For Drake, For Galaxy, For Hallicrafters, For Collins, For Wouxun, For Heathkit, For Kenwood, For Yaesu, Universal, For RadioShack, For Ranger, For Ten-Tec
Features
Volume controls, Built-In Headphone Jack
Compatible Model
eBay US

Dimensions

Height
2.25in
Width
3.75in
Item Weight
1.25 lbs

Item description from the seller

Seller business information

About this seller

phoenixvtg

98% positive Feedback•6.5K items sold

Joined Apr 2020
Registered as a business seller
Hello! My name is Anthony and I'm based out of Arizona. I try to describe all my products as deeply as possible to ensure customer satisfaction! If there are any issues with your order i will be sure ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable postage cost
5.0
Delivery time
5.0
Communication
5.0

Seller Feedback (1,886)

All ratings
Positive
Neutral
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  • 6***0 (281)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    The delivery was swift, and the seller maintained excellent communication throughout the process. The item was meticulously packaged and matched the description perfectly. I received exactly what I was looking for. The seller deserves a 5-star rating, and I wholeheartedly recommend them.
    Dragon's Dogma Dark Arisen (PlayStation 4 2018) Tested (#375877537770)
  • o***o (63)- Feedback left by buyer.
    Past month
    Verified purchase
    Excellent Seller! Item arrived as described, well packaged and shipped very fast! Great value on the item and very happy with my purchase! A+++++!
    Grassroots Califonia Skull Strap back hat “F the world” (#376373486167)
  • e***n (287)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Today, I received by USPS my ordered item in exact good appearance and condition as described, and delivered in a sturdy, secured package. This item is a gift to myself, at a reasonable asking price, that I have been searching for. Thank you so very much!
    Dragonheart Draco Power-Flap Wings Dragon 9" Figure Complete Kenner 61608 1995 (#376206549228)
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Product ratings and reviews

Learn more
4.9
28 product ratings
  • 26 users rated this 5 out of 5 stars
  • 1 users rated this 4 out of 5 stars
  • 1 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 0 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 24 reviews
  • by murpee0
    05 Nov, 2019Most favourable review

    Well designed and very rugged.

    This is a very rugged unit. I do like the rubber skid pads that help to grip on flat surfaces. The unit assembles easily. It is great for ''gadget'' type hobbyists, yet I did MC in the military, and this is the genuine article.

    Verified purchase: YesCondition: NewSold by: C87jFBdoTXq@Deleted

  • by 94bond
    13 Jan, 2017Most critical review

    fine key, ugly oscillator

    I'm pleased with the key, but not with the sound of the oscillator. Each beep descends rapidly in pitch, with the result that even perfectly keyed morse code sounds a little drunk. The tone is also raspy and harsh (triangle wave). I checked some YouTube videos, and it seems these traits are typical of this model, although not all descend in pitch as much as mine does. My oscillator is so repulsive to my ear that I ended up buying a serial to usb conversion cable so I could use software on my computer to generate the sound. If I had known the oscillator was going to be like this then I probably would have purchased a higher quality key without an oscillator.

    Verified purchase: YesCondition: NewSold by: gigaparts

  • by niog_58
    05 Feb, 2023

    Nice little self contained morse key.

    Morse key with adjustable gap and tension. Volume and tone button. Takes a 9v battery. Reasonable sturdiness and weight. Decent quality for price and an all in unit for anyone who just wants to either learn morse or practice morse.

    Verified purchase: YesCondition: Pre-ownedSold by: spray281

  • by jihus-36
    03 Oct, 2018

    GREAT Product!!!!!

    This device has really helped me to send Morse Code much better. After listening to my coding, I have recognized several issues that I need to address to send more consistent cod. Thank you for a wondedrful product. -Dave H,

    Verified purchase: YesCondition: NewSold by: gigaparts

  • by lada1467
    05 May, 2021

    Works great

    Works great, heavy enough to not move around, rubber pads prevent scratching surfaces. I see no need for a separate power supply, the battery is lasting a long time.

    Verified purchase: YesCondition: NewSold by: gigaparts

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