Should anyone be interested, the estate of W3BNN includes two Atlantic Electronics spectrum displays. One has a 10.7 mHz input, the other 455 kHz. These are compact desktop units. They were designed and sold with the Icom receivers to government entities in the 80s. I have the vhf-uhf setup and it works well. Can't compete with modern SDR equipment but nice for vintage fear like the R-390A and such. No info on asking prices yet. Just trolling for his son, just now.