Alfa Network

6 ft. Antenna extension coaxial cable RP-SMA Male to N-Female CFD-240 low loss

$12.97

Pickup available at 2251 NW 41st Street

Usually ready in 1 hour

This special low-loss RP-SMA male to N female extension cable is CFD-240 (LMR-240* alternative) low loss shielding. The cable is 6 feet and can be used to put an extension between an RP-SMA antenna connector on a RAK 2, Nebra, or Bobcat miner on one end, and the RAK N-Male style outdoor antenna, or other N-male antenna ( because this cable has an N-female connector, so this cable connects to N-male antennas).

This cable is compatible with N-male outdoor antennas sold directly from RAK and Nebra. 

This cable is NOT compatible with the Rokland 8 dBi miner antenna, which has an N-female connector. If you need cable for the Rokland 8 dBi miner antenna, click here

We recommend this extension cable compared to some others online because it is a special low-loss cable (CFD-240 Low Loss 50 OHM). What does this mean? The antenna to which you will connect this to has a gain. Let's say for example you will be connecting this to an 8 dBi gain antenna. As the cable in between the antenna and adapter gets longer, you will experience cable loss, which is a drop in the signal gain of the antenna. With low-quality unshielded extension cables, the huge drop in gain will mean a much lesser range. Our special low loss cable limits the cable loss factor and preserves the high gain of your antenna.

We do recommend RokTape to seal all outdoor connection points. 

Compare gain loss of this cable:
915 MHz application: - 0.4 dB (Helium mining/LoRa device)

WiFi 2.4 GHz application: - 0.7 dB (standard home WiFi networking)
WiFi 5 GHz application: - 1.1 dB (dual band 2.4/5 GHz WiFi to 5 GHz networks)

Compare this to a cheaper RG-58 shielded cable of the same length- the gain loss would be -0.9 dB for 915 MHz, -1.8 dB for 2.4 GHz WiFi, and a whopping -3.1 dB for 5 GHz WiFi

That means standard RG-58 cables have much more gain loss than this cable!

If you invested a lot in your antenna, it is worth the extra amount to get a 240 or better grade low-loss cable to maximize your antenna performance. This goes double for Helium mining- a higher loss cable means you may be getting less reach with your miner, and therefore mining much less.

Additional Features:
- Length: 6 feet
- Impedance: 50 OHM
- Frequency: all bands from 0-6 GHz, including 868-915 MHz LoRa, 2400-2700 MHz WiFi/ 5100-5900 MHz WiFi

- Compatible with 2.4 GHz 802.11ac, 802.11n, 802.11g and 802.11b WiFi standards, 915 MHz LoRa standard
- Compatible with many WiFi adapters & Helium miners with RP-SMA ports

FAQ:

1. I see 9m cables on eBay for only a few dollars with free shipping from China. How can you charge so much for just about the same length?

An antenna extension cable is not like a power extension cable you would use with an electric lawn mower. In other words, all antenna cables are not basically the same. When you use a cable in between the antenna and the WiFi adapter, the gain of the antenna decreases markedly. This is a factor known as cable loss. The $3 and $4 RP-SMA extension cables in abundance on eBay have no low loss shielding. Using them will cause significant gain loss- so much so you may find your factory antenna connected directly to your adapter will begin to work better than your expensive high gain outdoor antenna. To limit gain loss, you need a thick shielded low loss cable, from a trusted manufacturer like ALFA Networks. It has special low loss shielding to limit your gain loss and simply works much better than cheap cables that have no low loss shielding.

2. I already have (or want to buy) an external antenna for my wireless adapter, and I want an extension cable so I can put my antenna further away from the adapter. How do I know if this is the right extension cable for me?

Check with the maker or seller of your antenna to find out what type of connector it has. As a rule of thumb, you want to get an RP-SMA male to RP-SMA female extension cable when the antenna you have can connect directly to the RP-SMA connector on your wireless adapter if you wanted it to. That would mean your antenna also has an RP-SMA connector, and this would be the right cable for you. If your antenna has another type of connector, meaning it is not possible for you to connect it directly to the RP-SMA connector on your wireless adapter, then please contact us so we can help you locate the right cable for your needs. Additionally, we always recommend to get as close to the length you need as possible. If you are only trying to go 10 feet, don't buy a 30 foot cable as you will have more gain loss.

Warranty & Support:
Complimentary 
Telephone and Email/Live Chat Support (Click Here)

Sales tax is required in many states and will be added at checkout if applicable to your delivery state. Tax exempt forms can be sent to our support department.

Return Policy: This item is a final sale item. Final sale items may not be returned except in cases of defect. Expedited shipping charges paid are non-refundable. 

*LMR is a registered trademark of Times Microwave

Shipping & Returns
FREE Standard shipping on all items shipped in the USA! 
We are in Florida and ship to: USA, Australia, Austria, Canada, France, Germany, Israel, Netherlands, and the United Kingdom. Local pickup available in Gainesville, FL

Expedited shipping orders placed before 3PM EST weekdays will ship that day. Standard shipping orders ship within 1 business day.

Sales tax: shipments shipped to states in which we are registered to collect tax will have appropriate tax added at checkout. Tax exempt forms can be sent to our support staff who can activate exemption status. 

Lost packages and insurance

International Shipping:

Shipping options are visible in cart by using the shipping estimator. Transit times posted are estimates. International packages are subject to customs holds and duty payment may be required by your government on delivery. The cost of duty  is not reimbursable. Internatonal shipping charges are not refundable in the event of a return.

Returns

See item description for product specific return policies, and return policies vary by item.

Bulk/High Value Order Returns

Due to the labor required to package and ship bulk orders, as well as cost and stock issues involved in replenishing items, bulk orders of 5 pieces or more are not returnable unless the equipment is defective or mis-advertised, or a return period is prenegotiated. For non-defective returns over $500, a restocking fee may be deducted from the refund to cover bank or card processing fees.

Backorder/Preorder

Items on backorder or preorder will ship as estimated on the item page. You can cancel an order any time up until shipment. Orders with expedited shipping will arrive in the advertised time after the order ships, not after the order is placed.

Cancellations

If you want to cancel an order, please email or call us at (352) 372-9902. If your item has not been shipped, we will cancel the order and provide a full refund.

Compatibility

Microsoft Windows 7, 8, 10, 11, Linux Kernel 4.19 or later

Customer Reviews

Based on 3 reviews
100%
(3)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
A
Alexander Lakatos
Antenna Cable Installation Help

Alex at Rokland was a big help in finding the most efficient way for me to connect my hub to the antenna. He stuck with me till I got the proper cable

T
Thien Truong

6 ft. Antenna extension coaxial cable RP-SMA Male to N-Female CFD-240 low loss

D
David Moore

6 ft. Antenna extension coaxial cable RP-SMA Male to N-Female CFD-240 low loss