I've been messing around with a noise circuit utilising a zener diode. As I understand it, the white noise is (effectively) of infinite bandwidth, from 0 to a Gazoogle Hertz. It's going through a LT1011 comparator which is rated to 10 GHz.
Clearly a wire wrapped (or point to point wired) circuit board won't manage the GHz range, but what will it manage? I know they used to wire wrap mainframe computers. Those photos are total rats' nests, and must be loaded with parasitic /stray capacitance everywhere. An estimate of magnitude would be useful. Might you get a meg?