--- product_id: 184732169 title: "Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable 40 feet" brand: "eightwood" price: "AR$211306" currency: ARS in_stock: true reviews_count: 13 category: "Eightwood" url: https://www.desertcart.com.ar/products/184732169-eightwood-rg400-rf-coax-cable-m17-128-double-shield-coaxial store_origin: AR region: Argentina --- # Good conductivity High-temp resistance Superior shielding Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable 40 feet **Brand:** eightwood **Price:** AR$211306 **Availability:** ✅ In Stock ## Summary > Connect with Confidence! 🔗 ## Quick Answers - **What is this?** Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable 40 feet by eightwood - **How much does it cost?** AR$211306 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/184732169-eightwood-rg400-rf-coax-cable-m17-128-double-shield-coaxial) ## Best For - eightwood enthusiasts ## Why This Product - Trusted eightwood brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Compatibility:** Perfect for a range of devices including cable modems, satellite dishes, and network routers. - • **Unmatched Signal Clarity:** Experience crystal-clear connectivity with our RG400 coax cable, designed for optimal signal transmission. - • **Heat-Resistant Durability:** Built to withstand high temperatures, ensuring longevity and reliability in any environment. - • **Impressive Frequency Range:** Max operating frequency of 12,400 MHz for high-performance applications. - • **Double Shielding Excellence:** Enjoy peace of mind with superior shielding performance that minimizes interference. ## Overview The Eightwood RG400 RF Coax Cable is a robust 40-foot double shielded coaxial cable designed for superior signal transmission and durability. With a maximum operating frequency of 12,400 MHz and heat-resistant materials, this cable is perfect for both indoor and outdoor use, ensuring reliable connectivity for your cable modems, satellite dishes, and network routers. ## Description Buy Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable 40 feet: Coaxial Cables - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Very similar to Mil-spec cable - Being unmarked and at a price of about 1/3 that of Mil-spec RG-400, I was skeptical but decided to give this a try for a non-critical application -- and I was pleasantly surprised. I measured the 40 foot length with a professional grade vector network analyzer (VNA) and compared it to a length of Mil-spec cable I'd previously purchased from a reliable source. Velocity factor and characteristic impedance (Z0) of the two cables were virtually identical. Also, the Z0 of this cable was at least as constant along the 40 foot length as that of the Mil-spec cable, indicating that the physical construction is uniform with no anomalies. The shields appear to be as tightly wound as those of the Mil-spec cable. The only difference I could detect was a slightly higher loss. I measured the loss only between 3 and 200 MHz which was the range where I'll be using it. The loss of this cable was about 6% greater at 3 MHz, and 1 to 2 percent greater at 10 - 200 MHz. These could indicate that the silver plating on this cable isn't as thick, or might be some other material. This small difference in loss itself would be insignificant in just about any application, but if due to a plating difference it might mean that the cable would deteriorate in a shorter period than the Mil-spec counterpart, if exposed to the environment for a long time. At least as far as I'm able to determine, this cable will be useful for a lot of applications calling for RG-400/U, at greatly reduced expense. Review: Duble sheled silver tined coper. - Hi quality good stuff. ## Features - RF double shielded RG400 coax cable, 40 feet - Good conductivity and signal transmission | Superior shielding performance | High-temperature resistance | Max. Operating Frequency:12400MHz - Material--Inner conductor: silver plated copper | Insulator: PTFE | Outer conductor(shielding) : silver plated copper double braid | Jacket: FEP - Diameter-- Inner conductor: 19*0.203mm | Insulation:2.95mm | Outer conductor( shielding):3.95mm | Jacket: 4.95mm - Impedance:50 ohm | Package Includes: 1x 40 feet RG400 cable ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07WJG7XF6 | | Best Sellers Rank | #20,831 in Electronics ( See Top 100 in Electronics ) #99 in Coaxial Cables | | Brand Name | Eightwood | | Cable Type | Coaxial | | Color | pink | | Compatible Devices | Cable modems, satellite dishes, network routers | | Connector Gender | Male-to-Male | | Connector Type | Coaxial | | Customer Package Type | Long box | | Customer Reviews | 4.5 4.5 out of 5 stars (181) | | Frequency | 12400 MHz | | Indoor Outdoor Usage | Indoor, Outdoor | | Item Shape | Round | | Manufacturer | Eightwood | | Maximum Voltage | 1900 Volts | | Model | ZRG40040 | | Number of Items | 1 | | Number of Pins | 2 | | Other Special Features of the Product | Braided, Heat Resistant | | Outer Material | silver plated copper double braid | | Part Number | ZRG40040 | | Recommended Uses For Product | Base Station, Antenna extension | | Specification Met | Nom | | UPC | 790404665768 | | Unit Count | 1 Count | ## Product Details - **Brand:** Eightwood - **Cable Type:** Coaxial - **Compatible Devices:** Cable modems, satellite dishes, network routers - **Connector Type:** Coaxial - **Special Feature:** Braided, Heat Resistant ## Images ![Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable 40 feet - Image 1](https://m.media-amazon.com/images/I/71IjkeHO6+L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Would you have some recommended sma male connectors for this rg400 cable ?** A: Well in my case I use SILVER 259 connectors because they work the best and also the SILVER reducers. If you buy the 259's Don't come with the reducers so you'll have to search them too. **Q: what is power handling at ham hf freq?** A: I generally only use RG400 for building short jumpers, RF chokes and baluns. I've run 5KW through these with no problem, but I'm not certain about the exact specification. I started using this after disassembling a DXE 5KW balun and saw that it is what they used. **Q: What is the velocity factor of this coaxial cable?** A: I'm not certain for this manufacturer, but almost all RG400 is around 70% (±0.5%). I typically only use this for building indoor RF chokes, baluns and short jumpers. It will handle 5KW with no problem and is great for minimizing RFI. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very similar to Mil-spec cable *by E***E on May 2, 2023* Being unmarked and at a price of about 1/3 that of Mil-spec RG-400, I was skeptical but decided to give this a try for a non-critical application -- and I was pleasantly surprised. I measured the 40 foot length with a professional grade vector network analyzer (VNA) and compared it to a length of Mil-spec cable I'd previously purchased from a reliable source. Velocity factor and characteristic impedance (Z0) of the two cables were virtually identical. Also, the Z0 of this cable was at least as constant along the 40 foot length as that of the Mil-spec cable, indicating that the physical construction is uniform with no anomalies. The shields appear to be as tightly wound as those of the Mil-spec cable. The only difference I could detect was a slightly higher loss. I measured the loss only between 3 and 200 MHz which was the range where I'll be using it. The loss of this cable was about 6% greater at 3 MHz, and 1 to 2 percent greater at 10 - 200 MHz. These could indicate that the silver plating on this cable isn't as thick, or might be some other material. This small difference in loss itself would be insignificant in just about any application, but if due to a plating difference it might mean that the cable would deteriorate in a shorter period than the Mil-spec counterpart, if exposed to the environment for a long time. At least as far as I'm able to determine, this cable will be useful for a lot of applications calling for RG-400/U, at greatly reduced expense. ### ⭐⭐⭐⭐⭐ Duble sheled silver tined coper. *by R***. on June 10, 2025* Hi quality good stuff. ### ⭐⭐⭐⭐⭐ RF Choke Application Caution *by D***N on March 5, 2026* RG400 is frequently used for constructing RF Chokes for transmitting antennas. It works well for me even though this is not a premium quality coax. In this application it is important to not wrap the coax too tight on the toroid core (typically an FT240-43 or FT240-31 core) because a tight wrap will exceed the minimum bend radius for RG400 coax (i.e. 0.5", or a 1" diameter loop). The reason for this is that the PTFE center insulation material will fail under use as the center conductor pulls through the PTFE like a hot wire knife. When used as an RF choke, the wire will heat up as RF current flows through the device. Keep the loops wrapped no smaller than 1" diameter and you should be OK. ## Frequently Bought Together - Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable 40 feet - MOOKEERF 10 Pack 50 Ohm BNC Male Crimp Connector,BNC/Q9 Connector for RG58/RG142/RG400/LMR195/KSR195/3D-FB Cable - MOOKEERF TNC Male Connector 10PCS, TNC Male Plug Crimp Connector for RG58/RG142/RG400/LMR195/KSR195/3D-FB Cable --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/184732169-eightwood-rg400-rf-coax-cable-m17-128-double-shield-coaxial](https://www.desertcart.com.ar/products/184732169-eightwood-rg400-rf-coax-cable-m17-128-double-shield-coaxial) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-04-26*