
DX Engineering
300 Ω Ladder Line
DX Engineering 300 ohm Ladder Line is rated for over full legal power and is super strong, featuring two 18gauge conductors consisting of 19 strands of copper-clad steel wire. Also known as window line, this is the
same high-quality ladder line used in DX Engineering multi-band dipole antennas. DX Engineering 300 ohm
Ladder Line has 272 ohm nominal impedance and an 88 percent velocity factor.
DXE-LL300-1C - 100 Foot length
DXE-LL300-2C - 200 Foot length
DXE-LL300-3C - 300 Foot length
DXE-LL300-4C - 400 Foot length
DXE-LL300-5C - 500 Foot length
Following are typical dry attenuation measurements (db/100 ft.) made on a randomly selected 100 foot length of
DX Engineering LL300 300 ohm ladder line.
MHz Dry Damp
Attenuation dB Attenuation dB
1 0.240
2 0.320
4 0.415
6 0.437
8 0.459 1.410
10 0.485
14 0.515
18 0.546
22 0.568 1.530
26 0.625
30 0.668
35 0.773
40 0.840
50 0.890 2.150
The "damp attenuation" measurements are only a point of interest made by merely spraying the line with a mist
which dried rapidly after application. These typical figures illustrate the effect of water on ladder line. This
attenuation returns to normal dry figures as the moisture evaporates.
Our ladder line consists of a linear low density polyethylene insulation over two copper conductors. Neither the compound or the
copper are listed on the Chemicals List of Proposition 65 of the State of California.
DX Engineering 2018
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: (800) 777-0703 Technical Support and International: (330) 572-3200
Fax: (330) 572-3279 E-mail: DXEngineering@DXEngineering.com
www.DXEngineering.com
DXE-LL300-Info-Rev 2