
( Brand: Mfj ), ( Manufacturer Part Number: MFJ-813 ), ( Part Type: Manual )
The MFJ-813 HF QRP SWR/Wattmeter is an essential tool for any amateur radio operator, particularly those who enjoy operating in the QRP (Less than 5 watts) mode. This device is designed to provide accurate readings of SWR (Standing Wave Ratio) and power output, ensuring that your antenna system is operating at its best.
The MFJ-813 is a compact and lightweight unit, measuring just 4.5 inches by 2.25 inches by 1 inch, making it easy to carry and transport. It features a high-resolution LCD display that clearly shows SWR, power output, and frequency. The display is backlit for easy reading in low light conditions.
The MFJ-813 is designed to operate across the HF (High Frequency) bands, covering frequencies from 1.8 MHz to 30 MHz. It is equipped with a 50 ohm SMA interface, making it compatible with a wide range of radio transceivers.
The device also features a built-in attenuator, allowing you to adjust the input power level to protect your transceiver from overdrive. This is particularly useful when testing antennas or when operating in QRP mode.
The MFJ-813 is powered by a single 9V battery, with a battery life of up to 100 hours of continuous use. It also includes a battery status indicator to let you know when it's time to replace the battery.
The user manual for the MFJ-813 provides detailed instructions on how to use the device, including setup, calibration, and troubleshooting. It also includes a comprehensive list of specifications and technical information. The manual is available in both printed and digital formats.
In conclusion, the MFJ-813 HF QRP SWR/Wattmeter is a high-quality, easy-to-use, and versatile tool for any amateur radio operator. Its compact size, high-resolution display, and built-in attenuator make it a must-have addition to any HF station. The user manual provides clear and comprehensive instructions for using and maintaining the device.
Pros of buying a MFJ-813 HF QRP SWR/Wattmeter:1. Wideband coverage: The MFJ-813 covers a wide range of frequencies from 1.8 MHz to 54 MHz, making it suitable for various HF bands.
2. Compact and portable: With its small size and lightweight design, the MFJ-813 is easy to carry around and can be used in various locations, such as in the field or at a portable station.
3. SWR and Power meter in one: The MFJ-813 provides both SWR (Standing Wave Ratio) and power reading, allowing you to monitor the performance of your transceiver and antenna system.
4. Affordable: The MFJ-813 is relatively inexpensive compared to other SWR/Wattmeters in the market, making it a budget-friendly option for hobbyists and enthusiasts.
Cons of buying a MFJ-813 HF QRP SWR/Wattmeter:1. Limited power handling: The MFJ-813 can only handle up to 50 watts of RF power, which may not be sufficient for high-power stations.
2. Analog display: The MFJ-813 has an analog display, which may not be as accurate or easy to read as digital displays.
3. Limited features: Compared to more advanced SWR/Wattmeters, the MFJ-813 has limited features, such as remote control or data logging.
Conclusion:The MFJ-813 HF QRP SWR/Wattmeter is a budget-friendly and compact option for hobbyists and enthusiasts who require a basic SWR/Wattmeter for monitoring their HF transceiver and antenna system. Its wideband coverage, compact size, and ability to provide both SWR and power readings make it a convenient and useful tool. However, its limited power handling and analog display may not be suitable for high-power stations or those who require more advanced features.
Recommendation:If you are looking for a basic and budget-friendly SWR/Wattmeter for monitoring your HF transceiver and antenna system, the MFJ-813 HF QRP SWR/Wattmeter is a good option to consider. However, if you require more power handling or more advanced features, you may want to consider other options in the market that offer better performance and functionality.
Rugged black aluminum case, so-239 uhf connectors, 4-1 2in w x 2-1 4in3in. Please review the pictures thoroughly as item you see pictured is exact that will receive.
Brunei-style bridge circuit detects both RF current and voltage to ensure uniform accuracy across a wide range of load impedance's, operating frequencies, power levels. Original owners manual included, no power supply included MFJ-813 hf qrp wattmeter and swr bridge read forward reflected from 0-5 watts on a calibrated meter scale - plus relative at any level 100mw to 50. Its a great tool for working on your qrp radios, Free shipping the sale of this item will benefit charity.