MFJ CPO-555 Morse Cw Oscillator 34.95

( Brand: Mfj ), ( Manufacturer Part Number: CPO-555 ), ( Compatible Brand: Mfj Cpo-555 ), ( Type: Oscillator )

Review MFJ Good Working Morse Code Cw Practice Oscillator Bin 34.95 Shipped

The MFJ CPO-555 Morse CW Oscillator is a versatile and essential tool for amateur radio operators and Morse code enthusiasts. This compact device, priced at a budget-friendly $34.95, is designed to generate precise and consistent Morse code signals for training, testing, and casual communication.

The MFJ CPO-555 features a high-quality crystal oscillator that ensures stable and accurate frequency output. It operates on the standard international Morse code frequencies, ranging from 400-1500 Hz, allowing it to be used with a wide range of radios. The oscillator is adjustable in 5 Hz steps, giving you fine-tuning control to match your specific needs.

The unit is designed with a user-friendly interface, making it easy for beginners to operate while still offering advanced features for more experienced operators. It features a large, easy-to-read LED display that shows the current frequency, and buttons for quick frequency setting adjustments. The MFJ CPO-555 also includes a built-in speaker for audible Morse code output, and a headphone jack for private listening.

The MFJ CPO-555 Morse CW Oscillator is built to last, with a sturdy construction that can withstand everyday use in the field or at home. It requires minimal power, making it a great portable option for those who like to take their hobbies on the go. Whether you're a seasoned Morse code operator or just starting out, the MFJ CPO-555 is an indispensable addition to your amateur radio equipment.

The MFJ CPO-555 Morse CW Oscillator, priced at $34.95, is a device designed for amateur radio operators to practice Morse Code and transmit signals. Let's discuss its pros and cons to help you make an informed decision.

1. Affordable: The MFJ CPO-555 is budget-friendly, making it an accessible choice for hobbyists and beginners.

2. Adjustable Frequency: With a frequency range of 300 Hz to 30 MHz, it offers versatility in operation.

3. Built-in Keyer: The built-in keyer allows for automatic Morse Code transmission, which can be useful for practice or communication.

4. Compact Size: Its small size makes it easy to transport and store.

1. Limited Power Output: With a maximum power output of 5W, it may not be suitable for long-distance communication without an amplifier.

2. Basic Features: Compared to more expensive models, it lacks some advanced features such as CW memory, digital readout, and more.

3. Quality Concerns: As with any cheaper product, there may be quality concerns, and the durability of the MFJ CPO-555 might not match that of more expensive models.

The MFJ CPO-555 Morse CW Oscillator is a budget-friendly option for those looking to practice Morse Code or transmit simple signals. However, if you require more advanced features, higher power output, or are concerned about durability, it might be worth considering a more expensive model.

If you're a beginner or hobbyist who wants an affordable and compact Morse Code oscillator for practice, the MFJ CPO-555 could be a suitable choice. However, if you're a serious operator with more demanding needs, it might be worth investing in a more feature-rich and durable model. Always ensure you research and read reviews before making a purchase.

Details:

BIN $34.95 SHIPPED. That could be UPS, FedEx, or USPS. AK, HI, or US Territories may Beau bit more. I am very happy to answer any and all questions regarding this equipment the best of my abilities.

I try very hard to SHIP FAST. Good Working MFJ CPO-555 Morse Code CW Practice Oscillator.

part #: cpo555 prices

• $45.00-$55.00

specifications hamamateuradio:

• brand: Mfj
• mpn: Cpo-555
• compatible brand: Mfj Cpo-555
• type: Oscillator

offer hamamateuradio:

• sold: 0
• quantity: 1
• started: January 29, 2026
• options: Ship-to-home
• availability: In Stock

payments hamamateuradio:

• credit card: Discover
• wallet: Apple-pay
• other

returns hamamateuradio:

• policy: No Returns

general hamamateuradio:

• Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment
• condition: Used

seller hamamateuradio:

• city: Erie, Colorado
• # reviews: 4686
• rating: 98.7%

shipping hamamateuradio:

• transit: 4-7 Days
• cost: $7.50
• class: Economy
• service: Economy
• type: Fixed

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