cable thickness
 

hi,just noticed new billboards advertising virgins "cable thickness" compared to bt infinity's "cable thinness".pretty pathetic sexual innuendo regarding the images.very Frankie howard.Anyway does the thickness of cable make a difference as virgin are claiming as I would have thought bt would be using comparable quality cable just thinner.Just wondering.

Re: cable thickness
 

May be frankie Howard style but it caught your eye - job done !

Re: cable thickness
 

In electrical wiring, thicker cables have higher bandwidths.

Re: cable thickness
 

The exact opposite of the truth. Thicker cables have lower bandwidths. But they also have lower resistance and thus lower loss.

http://www.microwaves101.com/encyclopedias/coax

---------- Post added at 17:47 ---------- Previous post was at 17:44 ----------

I guess they got bored of yelling "fibre optic" when people wised up to the fact their competitors had just as much if not more "fibre optic".

In respect of broadband, it's the type of cable making the difference, not the thickness. Coaxial and twisted pair are completely different types of cables.

I haven't seen the ad but I suspect it'd fail to mention VM's "thicker" cable gets shared between *cough* hundreds of *cough* users.

Re: cable thickness
 

My electronics and radio telecomms training and experience tends to disbelieve that. Even aerial dipoles are made "thicker" to increase bandwidth. :dozey:

Re: cable thickness
 

But a dipole isn't coax, the increased spacing between centre and shielding will reduce bandwidth but will also reduce attenuation but will increase power handling.

Re: cable thickness
 

As I understand it those who know always rated girth over length to be honest.

Re: cable thickness
 

......and that is why I'm a lesbian ;)

Re: cable thickness
 

Me too.

Re: cable thickness
 

Im just glad they are no longer telling customers we install fibre to the house

Re: cable thickness
 

I'm a lesbian and so is my wife.

Re: cable thickness
 

Your electronics and radio telecoms training seems to have missed out some very basic principles then it seems, like higher order propagation modes.

http://whites.sdsmt.edu/classes/ee48...1Lecture10.pdf

Aerial dipoles are not made thicker to increase bandwidth.

---------- Post added at 10:30 ---------- Previous post was at 10:29 ----------

Exactly this. Thicker cables will carry higher frequencies and more power longer and further as long as those frequencies don't exceed the maximum cut-off frequency (i.e. bandwidth) of the cable .

---------- Post added at 10:31 ---------- Previous post was at 10:30 ----------

Without girth, length would be impossible. But without length, the girth would be useless.

Re: cable thickness
 

I knew I was been misled

Re: cable thickness
 

Thicker elements on a dipole will provide a wider VSWR bandwidth, the technology is used with birdcage dipole elements. Thicker wire in coils for filters will have the opposite effect, having a higher Q than thinner wire produces a narrower bandwidth. Duplex filters or notch filters of the lumped variety etc are often made with microbore plumbing pipe or thick silver coated wire to provide the low losses and high Q required for a sharp cut -off in the case of a duplex filter or narrow bandwidth and low out of band losses for notch filters.

Birdcage antennas often get mistaken for the fan dipole variety, these use thinner cables of slightly different lengths to broaden the resonance.

Re: cable thickness
 

As fascinating as "skin effect" is to whatever Yagi / Moxon / Spider / Delta / Quad etc array we discuss then I still believe the Cable thickness is inversely proportional to the posters IQ... :p
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