[Elecraft] Elecraft, RJ45 Standard.

2016-05-10 Thread David Robertson
Kevin, Thanks for pointing out my typo. I meant 4 pairs. 73 -- Dave Robertson KD1NA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread Eric Swartz - WA6HHQ, Elecraft
Folks - due to the large number of posts on this topic, let's end the thread at this time to give our other readers a rest. 73, Eric Moderator /elecraft.com/ On 5/9/2016 3:10 PM, Lynn W. Taylor, WB6UUT wrote: On 5/9/2016 10:03 AM, Jim Brown wrote: At audio levels, the shielding from

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread Lynn W. Taylor, WB6UUT
On 5/9/2016 10:03 AM, Jim Brown wrote: At audio levels, the shielding from twisting the wires might be helpful. It is VERY helpful. When I said *might* I was being slightly sarcastic. If a cable has an RJ-45 on each end, there is always a chance in a modern home that the cable is going to

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread Jim Brown
On Mon,5/9/2016 1:21 PM, dave wrote: > You're missing the fact that although these conductors INTENTIONALLY > carry DC and low rate signals, they also can PICK UP RF and AF noise. > Twisted pair, when used to carry a signal, is at least as powerful at > rejecting RF and AF noise pickup as coax,

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread dave
> You're missing the fact that although these conductors INTENTIONALLY > carry DC and low rate signals, they also can PICK UP RF and AF noise. > Twisted pair, when used to carry a signal, is at least as powerful at > rejecting RF and AF noise pickup as coax, but ONLY if the pair is > dedicated

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread Jim Brown
On Mon,5/9/2016 9:41 AM, Lynn W. Taylor, WB6UUT wrote: If we're talking DC levels, sure, no problem. Low rate signalling just won't matter. You're missing the fact that although these conductors INTENTIONALLY carry DC and low rate signals, they also can PICK UP RF and AF noise. Twisted

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread Lynn W. Taylor, WB6UUT
Uh, maybe not. If we're talking DC levels, sure, no problem. Low rate signalling just won't matter. At audio levels, the shielding from twisting the wires might be helpful. If we're actually using them for Ethernet, then the twisted pairs aren't wires, they're transmission lines. 100

Re: [Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread Philip Carter
Close. There are 4 pair. On Monday, May 9, 2016 11:42 AM, David Robertson wrote: David Robertson 9:55 AM (1 hour ago) to kenin.stover, Elecraft Kevin, Thanks for the information on the RJ45 standards. what confuses me is there are 6 pair of

[Elecraft] elecraft,RJ45 Standard

2016-05-09 Thread David Robertson
David Robertson 9:55 AM (1 hour ago) to kenin.stover, Elecraft Kevin, Thanks for the information on the RJ45 standards. what confuses me is there are 6 pair of wires in a CAT 5 cable. In the standards you list, the only difference is the placement of the Orange/Orange-White