Cat 5 internal wiring, single strand or multiple?
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 13th May 2006, 11:34 PM #21 Lostcause   diyAudio Member     Join Date: Aug 2005 Location: NW UK Surely if there is a different amount of twist then there is more cable in some of the twists yeh? OK, OK, it probably wont make any difference......would it???
Bob Brines
diyAudio Member

Join Date: Jan 2003
Location: Hot Spring Village AR
Quote:
 Originally posted by Lostcause Surely if there is a different amount of twist then there is more cable in some of the twists yeh? OK, OK, it probably wont make any difference......would it???

Let's see. At the speed of light, the signal will traverse a meter of cable in ~3e-9 seconds. And if the wires differ by a cm in length....'

Ok, the speed of the signal in copper will be slower than in a vacuum, but not that much.
smile

Bob

 14th May 2006, 03:17 AM #23 Taperwood   diyAudio Member   Join Date: Apr 2005 Location: Bremerton, WA. Oh man, so now you're saying that If I don't get the lengths exactly the same I'll now have to put the shorter wire in a vacuum? Shoot! I knew I should have listened to my mother and taken up stamp collecting.
 14th May 2006, 07:24 PM #24 Lostcause   diyAudio Member     Join Date: Aug 2005 Location: NW UK Hey, you joke.... but what about us novices that are told to keep the speaker wires the same length! Why? Here we have a mix of wires some 30% longer than the other and of quite a high resistance....and then there's capacity....Oh my God, my brain hurts!!!! Then I look at my BSC circuit and it has a resistor in it with one solitary wire thats less than 0.5mm diameter..... What? More Gin and Tonic.....that will make it better!
 14th May 2006, 08:17 PM #25 planet10   frugal-phile(tm) diyAudio Moderator     Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Bob's 1st question was what speaker... you also need to include amp in this equation. We are mostly playing with FE108ES/FE126/FE127 & CSS FR & WR driven by RH84, trioded class A EL84 PP (variant of El Cheapo with better iron), and MiniA. We started out using Cat 5 with the 4 strips together & 4 solids together (and as many as 24 strands for speaker cable), and have slowly moved to single pairs of wires. These should be spearated. The last speaker cable shootout we did a single pair of cyro-treated PVC insulated Cat 5 wires was quite a bit better than a 4/4 section of Teflon insulated.... dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA
Lostcause
diyAudio Member

Join Date: Aug 2005
Location: NW UK
Quote:
 Originally posted by planet10 Bob's 1st question was what speaker... you also need to include amp in this equation. We are mostly playing with FE108ES/FE126/FE127 & CSS FR & WR driven by RH84, trioded class A EL84 PP (variant of El Cheapo with better iron), and MiniA. We started out using Cat 5 with the 4 strips together & 4 solids together (and as many as 24 strands for speaker cable), and have slowly moved to single pairs of wires. These should be spearated. The last speaker cable shootout we did a single pair of cyro-treated PVC insulated Cat 5 wires was quite a bit better than a 4/4 section of Teflon insulated.... dave
Is there an end to this?................ Do we suddenly attain enlightenment?.....help!

planet10
frugal-phile(tm)
diyAudio Moderator

Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Quote:
 Originally posted by Lostcause Is there an end to this?................ Do we suddenly attain enlightenment?.....help!

No.

westend
diyAudio Member

Join Date: Jul 2005
Location: shorewood
Quote:
 Originally posted by Lostcause Is there an end to this?................ Do we suddenly attain enlightenment?.....help!
From a practical standpoint, the price of PVC Cat5 is low enough that you could make up many configurations of speaker cable and not break the bank. Using an SI T-amp on CSS FR125, FE126e, and others,I've found splitting the pairs (4 wire to + and 4 wires to -) and using the original sheath to be a workable solution.

diyAudio Member

Join Date: Apr 2002
Location: Medford, Oregon, USA
Quote:
 Originally posted by Bob Brines You are correct about out-of-the-box Cat5 cable. But, that is not what I was referring to. THIS is the 27 wire braided formula I had in mind: http://www.venhaus1.com/diycatfivecables.html. Tell me that this stuff doesn't have high capacitance! You are also correct that all of these tweaks etc only apply way above the audio frequency range and that was sort of my point anyway. Bob

Wow! Someone had a lot of time on their hands
__________________

planet10
frugal-phile(tm)
diyAudio Moderator

Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Quote:
 Originally posted by westend splitting the pairs (4 wire to + and 4 wires to -) and using the original sheath to be a workable solution.
Certainly the most expedient in terms of time.

BTW i have a 1000 ft roll of plenum grade Cat 5 -- the intention of which was to get cryotreated & do a "group buy" on.

dave
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