Re: My first 10BASE5 network segment

2016-08-26 Thread Paul Koning
> On Aug 26, 2016, at 11:00 AM, Ian McLaughlin wrote: > > >> On Aug 26, 2016, at 7:56 AM, Paul Koning wrote: >> >> >> That reminds me of an amusing error in a 1980s trade rag for DEC users ("The >> DEC Professional"). It discussed how you could

Re: My first 10BASE5 network segment

2016-08-26 Thread Ian McLaughlin
> On Aug 26, 2016, at 7:56 AM, Paul Koning wrote: > > > That reminds me of an amusing error in a 1980s trade rag for DEC users ("The > DEC Professional"). It discussed how you could mix 10Base5 and 10Base2 hosts > by coupling the two size coax cables through an N to

Re: My first 10BASE5 network segment

2016-08-26 Thread Paul Koning
> On Aug 26, 2016, at 10:24 AM, Joseph Zatarski wrote: > > ... > Yes, the whole reflection thing could get into a bit of a complex > discussion involving transmission line theory, but I am an electrical > engineer, so here goes: > > Yes, you need proper termination at

My first 10BASE5 network segment

2016-08-26 Thread Joseph Zatarski
>On 26/08/2016 06:26, Warner Losh wrote: >> 10base5 also had rules for minimum bend radius > >True, because bending the cable alters the geometry and introduces >impedance discontinuities, though (to be picky) the allowable bend >radius varies between cable manufacturers because the precise cable

Re: My first 10BASE5 network segment

2016-08-26 Thread Pete Turnbull
On 26/08/2016 06:26, Warner Losh wrote: 10base5 also had rules for minimum bend radius True, because bending the cable alters the geometry and introduces impedance discontinuities, though (to be picky) the allowable bend radius varies between cable manufacturers because the precise cable

Re: My first 10BASE5 network segment

2016-08-25 Thread Warner Losh
On Thu, Aug 25, 2016 at 11:16 PM, tony duell wrote: >> >> You will need to terminate the coax. >> >> (terminator)-. . . >> (terminator). > > He said he has connected a 47 Ohm resistor at each end of the > coax. That's close enough

Re: My first 10BASE5 network segment

2016-08-25 Thread Pete Lancashire
You will need to terminate the coax. (terminator)-. . . (terminator). Typical installations would use "N" connectors. For example http://tech.mattmillman.com/projects/10base5/ The cable segments on each end should be (at least about 3 feet) before the

My first 10BASE5 network segment

2016-08-25 Thread Joseph Zatarski
Tuesday night, I got a small 2 node thicknet segment going between my DEC VXT2000 and my laptop. I took a quick demo video, https://youtu.be/A5T2GlAN2N4 The hardware setup is as follows: I have a twisted pair (10BASET) to AUI converter (a Lantronix LTX-C) (not to be confused with a 10BASET MAU)