23 Jan
2018
23 Jan
'18
11:15 a.m.
On Jan 23, 2018, at 1:35 PM, Mark Kahrs via cctech
<cctech at classiccmp.org> wrote:
A few notes:
...
The vampire tap transceiver used RG-8 cable originally. That's before they
added the lines around the cable and added additional shielding.
The cable spec given in the Ethernet standard doesn't mention additional shielding.
It does differ from RG-8 in that it calls for foam dielectric and a higher velocity factor
(0.77 rather than 0.66). Another common difference (not required by the spec) is that
RG-8 is polyethylene while Ethernet coax is usually PTFE.
paul