On Thu, 2012-11-08 at 16:57 +1300, Nick Rout wrote: > I think it is more a question of clean wiring - shitty connections, > older switchboards, none of that helps.
I doubt these are the reasons. My guess is that the there is more signal attenuation in an older house, especially with wires run in metal conduit, due to an increased capacitance. Furthermore, each room of an old house is wired radially to the switchboard and so the path length between adjacent rooms can be much longer. Again this increases signal attenuation. Older houses also use loop wiring to reduce the number of conductors within the conduit. This will increase the transmission line inductance and cause discontinuities in the characteristic impedance leading to additional signal reflections. But I guess this is a second order effect. If someone could loan me some time, I could look at the literature... Michael. _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
