[quote author="wilcofan"] What's the longest I should be running this and are there any considerations on quality at longer lengths?
[/quote]
Some out of theme:
Pure diffusion of electric potencial
O. Heaviside
Problem in all cables is, that they have dispersion,
this dispersion is caused by capacitance of cable.
Capacitance is dominant to inductance and then cable
performs as RC lowpass filter.
For longer distance pulses forms some as error function
(which is solution of Heat equation, heat diffusion. Application of this solution
was called Thomson (Thomson = Lord Kelvin) cable by O. Heaviside.
some year 1890 or older)
But we want to have only travelling, we want cable to be wave equation
"solver", but it is rather heat equation "solver".
If someone see, that we are modern than 1890, in cable technology
not. Cable must be distortionless. We want to have wave equation
as result. But for cables we have still heat equations. And we make repeaters and equalizers etc.
It is general solution to this. To make cable more magnetic.
In early times (1920) cable copper wires was wounded around by
magnetic ferrous wires. This was KRARUP cable.
These cables had low dispersion and losses in audio band.
Now, we have space technology, and cables are still the some,
Every producer control dielectric part of cables, but no producer
controls magnetic part.
Why nobody use cylindric magnetic layers on the copper wires of cable,
if we know, how to deposit it. They was used in computer memories.
Now, magnetic memories are obsollette, but why not use developed
technology to control magnetic properties of cables?
Why our cables are worse than KRARUPs 1920.
xvlk