[sdiy] Balanced lines volts/impedance's explained

[Peter Grenader]

That's one volt/mv - sorry

Peter Grenader wrote:

> Spoke to the Gods here at M&K:
> 
> Balanced voltage:  1.224 to 1.227 volts, safely rounded and accepted now to
> be 1.23 volts
> 
> Impedance however is all over the map now.
> 
> In the old days of 600 ohm lines, 0 VU was equivelent to 1/mw.  Why 600
> ohms?  Because when they ran the first test line at Bell labs, the line
> measured at that.  Had they ran a slightly longer line to get it to a nice
> round number like 1000 ohms, everything to this day would of worked out
> evenly. 
> 
> hope this helps
> 
>