Collection: LMR-400 & Low-Loss HF Coax, Cut to Length | Greyline
HF Coax Feedline, Cut To Your Run
The antenna gets the glory. The feedline decides how much of your signal survives the trip. We cut quality low-loss coax to the length you need and put the right connectors in the box for it, so you are not guessing at ferrule sizes or chasing parts across three websites. You install the ends to suit your station. We get you the right cable and the right connectors in one purchase.
Pick the cable, pick the length, tell us how you connect. We cut it and box it with matching connectors. Simple.
What Is In The Box
Cable, cut to your length. Survey-favorite lengths in stock, plus cut-to-order for any run that fits your site.
The matching connectors. The correct PL-259 or N connectors for that exact cable, in the box, ready for you to install. No size mismatches, no second order.
You finish the ends. Solder or crimp and weatherproof to suit your install. The way most of us have always done it, with the parts already in hand.
Which Cable Is Yours?
More cable is not always more signal. On a short run at HF, good coax loses a fraction of a dB you will never hear. On a long run, or under high SWR, the bigger cable wins back far more than it costs. Here is a valuable read, best value to highest performance. When in doubt, the calculator settles it.
Best Value // DRF-400 (Greyline House Cable)
Low-loss 400-type HF coax at a price solid-copper cable cannot touch. The center conductor is copper-clad aluminum, and at HF that is the smart trade: your signal rides the copper skin, so you get genuine low-loss 400-type performance on the bands you actually work, while the aluminum core keeps the cost and the weight down.
For the vast majority of HF stations, DRF-400 is all the feedline you need, and the best dollar-for-dB value on this page.
LMR-400
Times Microwave LMR-400, the name-brand standard, with a solid bare-copper center. For the operator who wants LMR by name, or who runs a lot of 160m where a solid-copper conductor earns its keep. We stock it because you ask for it, and that is reason enough.
LMR-600
A bigger pipe for longer runs and the higher bands, where the extra conductor noticeably cuts loss. When the calculator shows you crossing 2 dB, this is the step up that earns its keep.
Heliax (1/2 inch & 7/8 inch)
The lowest-loss coax made. For very long runs, high power, or the operator who simply wants the best feedline money can buy and never thinks about it again. Under severe SWR, a 7/8 inch run beats everything else on this page by a wide margin.
Looking for balanced line? The 450-ohm ladder-line and silicone-in-conduit feedline systems — the lowest-loss feed for a non-resonant antenna — live on the Feedline System Kits page.
Let The Math Decide
Do not guess, and do not let anyone upsell you on cable you do not need. Put in your band, your run length, and your power, and see exactly how much signal each cable delivers. The number tells you which cable is yours.
Lengths
Stocked in the lengths our customers actually order — 25, 50, 75, and 100 feet — which covers most HF installs. Need something in between, or a longer haul? We cut to order, starting at 25 feet. Measure feedpoint to shack, add a little slack for dressing the cable, and order that.
Pick your cable and length below.
The Whole Feedline Picture
Feedline Physics — how loss, SWR, and common-mode current really work, in plain English.
The Feedline Loss Calculator — run your numbers, pick your cable.
Feedline System Kits — balanced line, ladder line, and silicone-in-conduit builds.
Smart. Strong. Elegant. The signal you make deserves a feedline that delivers it. From the Greyline bench in Sun Valley, Idaho.
73, Jon KL2A & the Greyline Performance Team — 435-200-4902
Ham Radio is fun again! Pass it on…
Sorry, there are no products in this collection