Provide a default spice model for transmission lines
Description
The Delay Line component has no electrical function, and is only a simulation model. It would be nice if, just like R, L and C, there was a spice model attached to it when the user places it.
However, the symbol is not compatible with most transmission line theories: The reference potentials should be different at both ends. so there should be 4 ports, not 3.
BTW, this might be because of my background, but I do not recognize this symbol as a transmission / delay line, but more like a shielded coil or with an iron core. This is what I usually draw ( which is basically a coax cable, a controlled impedance transmission line ):
I think this should come by default when adding a delay line:( from the ngspice doc )