Using a polyolefin insulation system with gas-injected foam compounds, the DBC broadband coaxial cable delivers up to 87% signal velocity. The 50½ RF cable provides an attenuation of less than 3.9 dB at 2 GHz depending upon cable size and construction. Shielding is rated at greater than 90 dB and crosstalk is specified at 180 dB.Available in sizes that range from 0.01" to 0.6", cables are also available for indoor, outdoor and plenum installations. HELIX/HITEMP CABLES, INC., Franklin, MA. (508) 541-7100.