Alfa Network

32 ft. Antenna extension cable RP-SMA Male RP-SMA Female CFD-400 low loss


Pickup available at 2251 NW 41st Street

Usually ready in 1 hour

We've got this special low-loss RP-SMA male to RP-SMA female extension cable designed to work with ALFA Network products. This is CFD-400 shielded.

This cable can be used with Helium miners but terminates into an RP-SMA female connection which is not a common connector for Helium antennas. 

The cable is 10m long (a little over 32 feet) and can be used to put an extension between an RP-SMA antenna connector on a Wi-Fi USB adapter or PCI card and an RP-SMA antenna. This is a special low-loss cable (CFD-400 NL 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 a 12 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. 

Why is this cable more than twice the price of our 5m CFD-200 extension cable?

It may seem more economical to chain two of our ALFA 5m extension cables together. This is not recommended. Our 5m cable has CFD-200 shielding, which is a good shielding for cables up to 5m length. For a 10m cable, CFD-200 is not the recommended shielding because of the distance. For a distance of 10m, to limit loss, CFD-400 is recommended. CFD-400 shielding is much thicker than CFD-200, and has several layers of protection. Because of this, the cable is 5 times more expensive to manufacture than the 5m CFD-200 cable. It is much heavier as well. Cable prices normally coincide with length, so a 10m cable will normally be twice the price of a 5m. But when you add in the thicker shielding, the cost goes up more. This cable is also five times heavier than our 5m cable, so the shipping cost is higher too.

Additional Features:

- Length: 10m
- 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 802.11ac, 802.11n, 802.11g and 802.11b WiFi standards
- Compatible with many WiFi adapters (any Wi-Fi USB adapter or PCI card with external RP-SMA connector)

Frequently Asked Questions:

1. I see 9m cables on eBay for only a few dollars with free shipping from China. Is that a better deal?

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 that are in abundance on eBay have no low loss shielding. Using them will cause significant gain loss. To limit gain loss, you need a thick shielded low loss cable, from a trusted manufacturer. It has special low loss shielding to limit your gain loss.

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 than you need.

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: Coaxial cable may be returned for refund if new within 30 days of delivery. Used coaxial cable cannot be returned except in case of defect. We only cover return shipping in case of wrong item shipped. Returned orders with free shipping selected will incur a 15% recovery fee to help us recover some of the original shipping cost, unless the item is defective or incorrect. Expedited shipping charges paid are non-refundable. For bulk purchases, see our bulk purchase return policy here.

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.


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.


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.


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.

Customer Reviews

Based on 5 reviews
Andreas Boller
How to confuse customers

After going through all the trouble to have a full-service and really fast service - which I appreciate - I am on-site with the customer and discover, that there seem to be TWO (2!) different standards for the antenna cable on a RP-SMA Male RP-SMA Female cable. They were NOT COMPATIBLE

Would love to speak to a representative

Keith Edger
32 ft. Antenna extension cable RP-SMA Male RP-SMA Female CFD-400 low loss

It works just fine a little stiff but nice that it is. Hope that it will come in what ever length is needed so you do not need to get two or three.
Well made, will see how it holds up after a few months.

Joseph Vogel
Helium mining

Got 3 of my miners up and running with these cables, so I'm happy.


Good customer service.


Came with broken connection

We are sorry this happened. Our Customer Service department has reached out to your email to find out what we can do to make it right.