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Howardken Posted:
I'm Vietnamese ,
So happy when a
new member
...

In The Forum:
Vonage UK
Topic:
hello every body
On Nov 01, 2014 at 01:54:01

hamfic Posted:
Retrospectiva
podría tener
recomienda que
previamente fue
demasiado
...

In The Forum:
Vonage UK
Topic:
botas ugg baratas
On Nov 01, 2014 at 01:21:55

jamsessd Posted:
. 'Questo è
che cosa
esattamente era
E' già stato
quasi tutto .
semplice
...

In The Forum:
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Topic:
UGG Stivali
On Oct 31, 2014 at 07:11:31

Rodneyhaw Posted:
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In The Forum:
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Topic:
Kaufen Viagra Hamburg
On Oct 30, 2014 at 09:00:58

Whitmarsh Posted:
The 'Vonage box'
is a Grandstream
HT-701 ATA. If
you download its
Used Guide, you
...

In The Forum:
Vonage UK
Topic:
Witholding Caller ID from display and the BT 1471 service
On Oct 26, 2014 at 00:04:03

Whitmarsh Posted:
I have just
installed a V
system and it all
works fine except
for the date/time
on
...

In The Forum:
Vonage UK
Topic:
Vonage messes up date/time on Panasonic DECT phone
On Oct 22, 2014 at 09:41:43

TUBSUB Posted:
Vonage router does
not recognize a HP
2270DW printer.
Current setup is:
Comcast-modem
...

In The Forum:
Vonage
Topic:
HP Printer setup issue
On Oct 05, 2014 at 15:28:26

eltonlight Posted:
Is this supported
by Iphone6? I am
just curious.
...

In The Forum:
Vonage
Topic:
Use with iPhone, and switch to data-only plan?
On Sep 24, 2014 at 05:06:04

Jesse641 Posted:
Hi, I have Skype
installed on PC,
but I use it
mainly to talk for
free. Otherwise
...

In The Forum:
Vonage
Topic:
Click to call iPhone App
On Sep 06, 2014 at 13:27:05

UncleDuck Posted:
The quality of
voicemail has
deteriorated to
the point that it
requires listening
...

In The Forum:
Vonage
Topic:
Voicemail Quality and Playback Issues
On Aug 19, 2014 at 17:20:01


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mbhn5204
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Joined: Jan 19, 2005
Posts: 492
Location: Denver, Colorado

PostPosted: Sat Feb 05, 2005 7:41 pm    Post subject: Coaxial Cable or Circular Waveguide Reply with quote Back to top

As I'm sure most of us have, I have a respectable collection of assorted cables that have piled up in a drawer over the years. I was looking for a short piece to connect two phase splitters in order to connect two TV's when I noticed that the newer cables were distinctly different from the old.

The old cables, RG75 if I remember correctly, were thinner than the new cables. They were also shielded with cheap copper braiding and had a sloppy connector. A plain old coaxial cable for sure. I had a roll of the newer cable for comparison. Thick, nonflexible and expensive connectors. The shielding proved to be something special. A solid stainless metal was wrapped around the inner insulator. It was fixed to the insulator with some sort of adhesive. The distance from the center conductor to the shielding was perfectly uniform throughout the length of cable.

I did microwave work years ago when I was a younger man. It seemed likely that what I had been examining was in fact a circular waveguide. I don't remember when Comcast had switched to this type of device. I assume the cable came in when the data rates went up. Impressive to say the least.

I think I'll be taking much better care of these cables from now on. Don't step on it, no crimps or sharp bends. I don't know enough about what goes through these cables. What are the standing wave ratios? How does a standing wave affect data rate, voltage, and rise times? Then again maybe it doesn't matter at all, or is a poor cable the root of some of the Broadband Router problems that some experience?
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kd1s
Vonage Forum Senior
Vonage Forum Senior


Joined: Jan 13, 2005
Posts: 78
Location: Providence, RI

PostPosted: Sat Feb 05, 2005 8:38 pm    Post subject: Ah, the good old days Reply with quote Back to top

While I was still active in the amateur radio field we used Belden 9913 cable. That stuff was rated for use from 144MHz to 1.2GHz or so without any serious attenuation.

Of course the gold standard was hardline. Hardline used an aluminum outer shell surrounded by polyeth or something similar. Inside was the center copper conductor supported by nylon supports every so many cm. That stuff was good for pretty much anything you throw at it with low attenuation of signal.

Many cable companies used it for their backbone before switching to fiber.
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mbhn5204
Vonage Forum Evangelist
Vonage Forum Evangelist


Joined: Jan 19, 2005
Posts: 492
Location: Denver, Colorado

PostPosted: Sun Feb 06, 2005 1:26 am    Post subject: Coaxial Cable Or Circular Waveguide Reply with quote Back to top

Ah! Amateur radio. I was once WB1AUJ. General class license. I can't remember the equipment manufacturer, it was common and a twin setup. That was over 30 years ago. Lost interest quickly. Got tired of QSL?
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