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Momobeam 1:1 Current Balun / RF Choke - 3-50MHz - 1x SO239 to 2x Screw Terminals
SKU Part Number:
MOMO-RFC
The Momobeam RF Choke Balun range is designed to suppress common mode current and provide a clean transition between balanced resonant antennas and...
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As low as
£105.95
Availability: In stock
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Call 0345 2300 599The Momobeam RF Choke Balun range is designed to suppress common mode current and provide a clean transition between balanced resonant antennas and unbalanced coaxial feedlines. These broadband 1:1 current baluns / RF chokes are ideal for use with resonant dipoles, Yagi antennas and other 50 ohm antenna systems where unwanted RF on the outside of the coax can cause problems in the shack.
Common mode current can increase received noise, cause incorrect SWR meter readings and create interference with electronic devices near the station or antenna system. By adding a suitable RF choke at the antenna feed point, operators can help keep RF where it belongs and improve the stability and reliability of the antenna installation.
The Momobeam RF Choke Balun is suitable for use on Yagi antennas with a 50 ohm feed point or resonant dipoles with low SWR. It can also be used as a replacement for a damaged 1:1 RF choke or current balun in compatible antenna systems.
Three versions are available, allowing operators to choose the correct model for their required power level and installation.
Available Versions
| SKU | Version | Frequency Range | Power Rating | Connection |
|---|---|---|---|---|
| MOMO-RFC-SC-1KW | Single Core W1JR Style | 3-50MHz | 1kW PEP | 1 x SO-239, 2 x stainless steel bolts |
| MOMO-RFC-DC-2KW | Dual Core W1JR Style | 3-50MHz | 2kW PEP | 1 x SO-239, 2 x stainless steel bolts |
| MOMO-RFC-DBC-4KW | Dual Big Core | 3-50MHz | 4kW PEP | 1 x SO-239, 2 x stainless steel bolts |
Key Features
- Broadband 1:1 current balun / RF choke
- Designed to suppress common mode current on coaxial feedlines
- Provides a transition between balanced resonant antennas and unbalanced coax
- Suitable for resonant dipoles and Yagi antennas with 50 ohm feed points
- Helps reduce received noise caused by feedline radiation
- Helps prevent incorrect SWR readings caused by common mode current
- Helps reduce RF interference in the shack or nearby electronic equipment
- Can be used as a replacement for a damaged 1:1 RF choke / balun
- Available in 1kW, 2kW and 4kW PEP versions
- SO-239 coaxial input with two stainless steel bolt terminals on the opposite side
Typical Applications
- Resonant dipoles
- Yagi antennas with 50 ohm feed points
- Half-wave dipole construction
- Balanced antennas fed with coaxial cable
- Replacement 1:1 current balun / RF choke installations
- Reducing common mode current on HF antenna systems
- Improving feedline behaviour in fixed and portable antenna installations
Important Note
This product is intended for balanced resonant antennas with low SWR, such as dipoles and Yagi antennas. It should not be confused with an unun for end-fed, random wire or other unbalanced antenna systems.
Shipping:
We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.
Returns:
If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:
Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request. Large items cannot be returned if they have been assembled, unless faulty.
Warranty Terms and Conditions
Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.
For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.
International Warranty information
Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]