[Elecraft] Noise gen / Spectrogram--who invented?

[Steven Gibbs]

I recall using Rhode & Schwarz test-sets for filter
alignment, also Tektronix tracking-generator and
spectrum analyzer combos.  Further back I recall
similar devices called wobbulators used for IFs.

- when was the technique of using wideband noise
   followed by audio or video spectrum analysis first
   described?

- ditto, for amateur radio applications?

I know we must all thank N0SS for suggesting this
tecnique using the Spectrogram program for K2 filter
& BFO setting, and also for providing a circuit and
pcb for a suitable noise generator. -- A LOT better
than the other methods I mentioned above.

73, Steve GU3MBS.