RG400

Good wire.

Hi quality good stuff.

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.

I was actually surprised that it was double shield. Also the center conducter is Teflon insulated.

I use this coax for all my jumpers needs and never had a issue with it. Works like it's suppose to and very flexible.

I have used it for jumpers and have it in my mobile. It ohms out fine and haven’t had any issues with it. I have purchased a 100 feet of it different times and its made well and a lot cheaper than the name brand stuff.

Will jumper not hold power loses 50 watt out of radio with jumper to swr meter 41.58 watts not good not worth the money

I purchased the Eightwood RG400 RF Coax Cable M17/128 to make jumper cables for my super high powered tube and solid state amplifiers. Much, much, much easier to use than LMR 400 because the RG 400 flexes super easy.Be sure to purchase the correct Eightwood connectors and you will be good to go.My only complaint is I wish I heard about this coax much, much, much sooner!