420300
High quality 300 ohm, foam filled, ribbon, HD TV twin-lead.

BUXCOMM Part Number:      420300
High Quality, 300 ohm, foam filled, ribbon (HDTV twin-lead).
7 Conductors equal AWG (Strand): 20
Nominal Impedance: 300 ohms
Important Note: Contrary to "old-dummy-tales," Foam Filled twin-lead composition will NOT
effect the radiation charactics of this twin-lead.  PE foam will not absorb moisture.
The foam-filler improves volicity factor, effeciency, and reduces the losses in this wire. 
Employed in folded-dipole, and compact dipole antennas.
Foam-filled , 300 ohm twin-lead is also used as a high-quality feedline, lead-in, for HDTV antennas.

BUXCOMM Part Number:    420300

Conductor AWG (Strand):     20 (7/28)
Attenuation:  MHz      db/100 FT

100      1.2
300      2.6
500      3.6
700      4.3
900      4.8

Nominal Impedance (in ohms)            300
RF Velocity Factor free space:           .88
Nominal temperature range:   -20°C to +60°C
Nominal outside diameter:                  .145 x .400

Jacket cover is resistant to Ultraviolet Rays
Foam PE will not absorb moisture
Foam PE does not melt below 135 degrees F^*