[Lowfer] Cat 5 cable

[Dave Brown]

----- Original Message -----
From: <riese-k3djc@juno.com>
To: <lowfer@mailman.qth.net>
Sent: Saturday, May 03, 2003 7:00 AM
Subject: Re: [Lowfer] Cat 5 cable


--snip

> If anyone remembers open wire then you should remember the transitions
> that happened every 5000
> feet or so

What!
Transpositions were every pole down here (a quarter turn of the quad, that
is)

--snip
>
> I still dont understand how an unshielded ,twisted pair can provide
> better isolation than a piece of coax.
> but remember the frequencies involver are relatively low. The important
> factor appears to be isolation
> and a balanced twisted pair will do a better job than a shielded un
> balanced coax

Coax screen effectiveness drops off dramatically at lower frequencies- a
well balanced pair will win hands down at VF and quite a bit higher.  But
remember that terminations have to be balanced as well-otherwise all bets
are off. Overall performance is determined by the design of both the cable
itself and the balance of the terminations.

--snip

> Ah the smell of watch oil and bank cleaning fluid   HAR
>
No need for coffee, eh?

73, Dave, ZL3FJ