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Momobeam RF Choke Line Isolator - 2x SO239s
SKU Part Number:
MOMO-RFC-LI
The Momobeam RF Choke Line Isolator range is designed to help reduce common mode current on 50 ohm coaxial feed lines. These broadband 1:1 W1JR style...
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£104.95
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Call 0345 2300 599The Momobeam RF Choke Line Isolator range is designed to help reduce common mode current on 50 ohm coaxial feed lines. These broadband 1:1 W1JR style chokes provide a clean transition between balanced antenna systems, such as dipoles and Yagi antennas, and unbalanced coaxial cable feed lines.
Common mode current can cause a range of unwanted problems in an amateur radio station, including increased receive noise, incorrect SWR meter readings and interference to electronic equipment in the shack or near the antenna system. Installing a suitable RF choke can help reduce these issues and improve overall station performance.
These Momobeam RF chokes can be installed at the antenna feed point, at the base of a tower, near the shack, or along the coaxial line as a feedline choke. They are also well suited for use with EndFed antenna installations, where controlling current on the outside of the coaxial cable can be especially useful.
This configurable listing allows you to choose from three versions depending on your required power handling and installation needs.
Available Models
| SKU | Power Rating | Frequency Range | Core Type | Connections |
|---|---|---|---|---|
| MOMO-RFC-LI-1KW-SC | 1kW PEP | 3 to 50MHz | Single core | 2 x SO-239 |
| MOMO-RFC-LI-2KW-DC | 2kW PEP | 3 to 50MHz | Dual core | 2 x SO-239 |
| MOMO-RFC-LI-4KW-DBC | 4kW PEP | 3 to 50MHz | Dual big core | 2 x SO-239 |
Key Features
- Broadband RF choke line isolator range
- 1:1 W1JR style design
- Helps reduce common mode current on coaxial feed lines
- Useful for dipoles, Yagi antennas, EndFed antennas and other HF installations
- Helps reduce unwanted receive noise
- Can help prevent misleading SWR readings caused by common mode current
- Helps reduce RF interference in the shack and nearby equipment
- Can be installed at the antenna, tower base, near the shack or along the feedline
- Frequency coverage from 3 to 50MHz
- Choice of 1kW, 2kW or 4kW PEP versions
- Fitted with 2 x SO-239 connectors
Installation Notes
For best results, the RF choke should be positioned where common mode current needs to be suppressed. This may be directly at the antenna feed point, at the base of a mast or tower, near the operating position, or along the coaxial feed line.
When used at the antenna, ensure any connecting pigtail or short coax section is suitable for the intended power level.
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]