Information on "Neher tube" --

I ran across a reference to the "Neher tube" on a Web site that is an interview with Edward Mills Purcell
dated June 14, 1991   The Web site is: Purcell Interview.  I included it on the Web page I did about Dad.
 
Here's where the Neher tube is mentioned:

                    Bryant: That's very interesting, On magnetrons, did you have a lab set up for building experimental units?

Purcell: No, none. No experimental units were built at Radiation Lab; there was no tube lab.

Bryant: Was there ever?

Purcell: Only for some very exotic things like Vic Neher's oscillator, a K-band oscillator. The person you should ask about that is H. Guyford Stever. He's an interesting person because of his subsequent career. He was head of NSF and he's been head of many other things; he was briefly science advisor to President Nixon.

Bryant: We missed on not interviewing him. There are only four of us doing interviews, and between us we have already scheduled 40 interviews..

Purcell: But the reason I mentioned him in this context is that Guy Stever worked directly under Vic Neher and knows more than any living person except Vic Neher about the Neher tube.