23 Jan
2018
23 Jan
'18
1:22 p.m.
On Jan 23, 2018, at 4:17 PM, Glen Slick via cctalk
<cctalk at classiccmp.org> wrote:
On Tue, Jan 23, 2018 at 11:15 AM, Paul Koning via cctalk
<cctalk at classiccmp.org> wrote:
Yes, that looks like the stuff. A smoky orange color due to the translucent jacket. I
once saw at DEC a run of prototype cable, which was bright yellow with black stripes.
Perhaps polyethylene jacket, which would explain why it was changed before becoming a
product -- that was right around the time when the "plenum rated" cable specs
were appearing.
paul
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.
FWIW, here is a spec sheet for Belden 89880 Thicknet 10BASE5 cable,
which apparently DEC used for their part number 17-00324-00 cable.
https://catalog.belden.com/techdata/EN/89880_techdata.pdf
<https://catalog.belden.com/techdata/EN/89880_techdata.pdf>