> On Jan 23, 2018, at 4:17 PM, Glen Slick via cctalk <cctalk@classiccmp.org>
> wrote:
>
> On Tue, Jan 23, 2018 at 11:15 AM, Paul Koning via cctalk
> <cctalk@classiccmp.org> wrote:
>>
>> 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>
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
