
( Brand: Mfj ), ( Manufacturer Part Number: 812B ), ( Type: Swr/watt/field Strength ), ( Country/region Of Manufacture: United States )
The MFJ-812B VHF SWR/Wattmeter from MFJ Enterprises is a comprehensive and versatile tool for any amateur radio enthusiast. This SWR (Standing Wave Ratio) and power meter is designed to operate on the VHF (Very High Frequency) band, making it ideal for use with 2-meter and 70-centimeter transceivers.
The MFJ-812B features a large, easy-to-read LCD display that shows both SWR and power readings in real-time. The SWR reading is displayed as a ratio, which indicates how well the antenna is matching the transmitter's output impedance. A low SWR reading (ideally 1:1) indicates a good match, while a high SWR reading (greater than 1:1) indicates a mismatch, which can result in inefficient operation and potential damage to your equipment.
The power meter function displays the output power of your transmitter, which can be useful for tuning your antenna, checking the performance of your amplifier, or simply monitoring your output power. The MFJ-812B can handle up to 150 watts of RF power, making it suitable for use with many popular VHF transceivers.
The MFJ-812B also features a built-in attenuator, which allows you to adjust the input power to your transmitter to ensure that you are within the recommended power levels for your particular transceiver. This is particularly useful when using high-power amplifiers, as it allows you to fine-tune the input power to avoid damaging your transceiver.
The MFJ-812B is compact and lightweight, making it easy to transport and set up at a variety of locations. It also features a sturdy construction, with a rugged metal case and high-quality components, ensuring that it will withstand the rigors of field use.
In summary, the MFJ-812B VHF SWR/Wattmeter is a must-have tool for any amateur radio operator. Its large, easy-to-read display, built-in attenuator, and rugged construction make it a reliable and versatile addition to your ham shack. Whether you are tuning your antenna, checking the performance of your amplifier, or simply monitoring your output power, the MFJ-812B has you covered.
The MFJ-812B VHF SWR/Watt Meter from MFJ Enterprises is a popular choice among ham radio operators for monitoring power and SWR (Standing Wave Ratio) in VHF radio systems. Here are some pros and cons to consider when deciding whether to purchase this meter:
Pros:1. Accurate measurements: The MFJ-812B is known for its high accuracy, providing accurate readings of power and SWR, which is crucial for ensuring optimal performance and preventing damage to your radio equipment.
2. Versatile: The meter can be used with both coaxial and banana plug connections, making it compatible with a wide range of VHF radio systems.
3. Durable: The MFJ-812B is built to last, with a rugged construction that can withstand harsh conditions. It also features a waterproof front panel, making it suitable for use in the field.
4. Easy to use: The meter is easy to operate, with a clear and easy-to-read display and simple controls. It also includes a built-in speaker that provides audible warnings for high SWR readings.
5. Affordable: Compared to some other SWR/Watt meters on the market, the MFJ-812B is relatively affordable, making it an affordable option for hobbyists and amateur radio operators.
Cons:1. Limited features: Compared to some more advanced SWR/Watt meters, the MFJ-812B has a limited set of features. It does not include functions such as frequency display or memory functions.
2. Not suitable for HF: The MFJ-812B is designed for VHF use only, and is not suitable for use with HF radio systems.
In conclusion, the MFJ-812B VHF SWR/Watt Meter is a reliable and affordable option for monitoring power and SWR in VHF radio systems. Its rugged construction, high accuracy, and easy-to-use design make it a popular choice among hobbyists and amateur radio operators. However, if you require more advanced features or need a meter for HF use, you may want to consider other options on the market. Overall, if you're looking for a simple and effective SWR/Watt meter for VHF use, the MFJ-812B is a great choice.
This is a nib Mfj enterprises vhf swr watt field strength meter in the original box with user manual. It is in perfect working condition with no scratches or cosmetic defects. Typically used in the vhf MHz band.