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Reviews Categories | Keys & Paddles | MFJ-557 Straight Key & Practice Oscillator Help

Reviews Summary for MFJ-557 Straight Key & Practice Oscillator
MFJ-557 Straight Key & Practice Oscillator Reviews: 1 Average rating: 5.0/5 MSRP: $$39.95
Description: Straight key and practice oscillator mounted on a metal base in one compact unit. Has volume and tone control. Earphone plug for privacy or hard of hearing. Battery or optional AC power supply for 9 volts.
Product is in production.
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KI4SDY Rating: 5/5 Nov 9, 2008 16:04 Send this review to a friend
Great for Beginners & Occasional CWers!  Time owned: 0 to 3 months
MFJ has offered this unit for years and it can be found new or used at half price. The key is identical to the Ameco K-1. It is inexpensively made, but works well. The oscillator is well made and adds weight to the metal base. The volume and tone controls work well. There is an earphone plug so you don't drive others crazy while using it or in case you don't hear well. You can use a 9 volt battery or a plug in power supply, which is an optional expense.

For the beginner or occasional CWer this unit is great. It is already mounted into one compact piece. You can use it for practice or wire it up to your transmitter and go on the air. I bought mine used for $15.50 on EBAY. A great bargain that you can use forever.

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