MFJ MFJ-557 Oscillator Key
( Brand: Mfj ), ( Part Type: Key ), ( Country Of Manufacture: United States )
Review MFJ Code Oscillator Key
The MFJ-557 Oscillator Key by MFJ Enterprises is a versatile and essential tool for any amateur radio operator. This keyer is designed to send Morse code signals accurately and reliably, making it an indispensable part of any station setup.
The MFJ-557 is a solid-state keyer, which means it operates without the need for vacuum tubes or other delicate components. This makes it highly reliable and maintenance-free, ensuring years of trouble-free use. The keyer features adjustable speed, from 5 to 60 words per minute, allowing you to customize the sending rate to your preference or the needs of the communication.
One of the standout features of the MFJ-557 is its built-in oscillator. This oscillator generates the Morse code signal, eliminating the need for an external signal source. The oscillator is adjustable in frequency, allowing you to match it to the frequency of your radio for optimal performance. The keyer also features an adjustable output level, ensuring that the signal is strong enough to be heard clearly over the air.
The MFJ-557 is designed with ease of use in mind. It features a large, easy-to-read display that shows the current sending speed and frequency. The keyer also has a built-in timer, which can be used to send pre-programmed messages or to pause the sending for a set amount of time. The keyer has a compact size, making it easy to install in even the tightest of spaces.
In addition to its basic features, the MFJ-557 also includes a number of advanced options. It has a built-in CW memory keyer, which allows you to store and recall pre-programmed messages. It also has a built-in iambic keyer, which mimics the natural rhythm of human Morse code sending. The keyer also has a number of adjustable settings, such as the keying weight and the keying speed, allowing you to fine-tune the keyer to your specific needs.
Overall, the MFJ-557 Oscillator Key is a high-quality, versatile, and reliable tool for any amateur radio operator. Its built-in oscillator and adjustable frequency make it easy to use, while its advanced features and easy-to-read display make it a pleasure to use. Whether you're a beginner or an experienced operator, the MFJ-557 is sure to become an indispensable part of your radio setup.
Pros of buying a MFJ-557 Oscillator Key (MFJ):1. Versatility: The MFJ-557 is a multi-function oscillator key that can be used for various purposes, such as testing antennas, tuning transmitters, and practicing Morse code.
2. Durability: The MFJ-557 is built to last, with a rugged aluminum case and high-quality components.
3. Easy to use: The MFJ-557 has simple controls and clear indicators, making it easy for even beginners to use.
4. Affordable: Compared to other oscillator keys on the market, the MFJ-557 is quite affordable.
Cons of buying a MFJ-557 Oscillator Key (MFJ):1. Limited frequency range: The MFJ-557 has a limited frequency range, which may not be suitable for all amateur radio applications.
2. No digital display: The MFJ-557 does not have a digital display, which may make it difficult to accurately read frequencies.
3. No battery backup: The MFJ-557 requires an external power source and does not have a battery backup, which may be inconvenient in power outages or field use.
In conclusion, the MFJ-557 Oscillator Key is a versatile and durable tool for amateur radio operators, especially for beginners. However, its limited frequency range and lack of digital display may be drawbacks for some users. If you are looking for an affordable and easy-to-use oscillator key, the MFJ-557 is a great option. If you require a wider frequency range or a digital display, you may want to consider other options on the market.
Recommendation: If you are a beginner or an amateur radio operator looking for an affordable and easy-to-use oscillator key, the MFJ-557 is a great option. However, if you require a wider frequency range or a digital display, you may want to consider other options on the market.
Details:
Used for club classes and very clean.
part #: mfj-557 prices
- $50.95-$80.00
specifications hamamateuradio:
- brand: Mfj
- part type: Key
- country of manufacture: United States
Seller hamamateuradio:
- city: Whitmore Lake, Michigan
- zipcode: 48189
General hamamateuradio:
- Consumer Electronics > Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment
- in stock: Yes
- condition: Used
Offer hamamateuradio:
- # bids: 0
- best offer: true
- # Sold: 0
- quantity: 1
- Started: January 13, 2016, 5:12 pm
Returns hamamateuradio:
- policy: no returns
Payments hamamateuradio:
- PayPal
Ratings:
- very prompt delivery 01-05-16
- Great transaction all around! Many thanks! 01-09-16
- Great! 12-10-15
- Fast shipping and great item! A+ thanks! 12-07-15
- Item receive today. thanks. A+++++ seller 11-30-15
Shipping hamamateuradio:
- type: Calculated
- handling: 2 days
- cost: $5.75
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