FYI-
There is an orange tube C-8 that has popped up on the CN classifieds (posted 9/19) with serial# 822641.... I did not see it in the current registry.
Apologies - not only am I somewhat delinquent in updating the Registry document (notifications of updates are posted here) but the machine which serves them is temporarily down. It may be out a few days, as I am taking the opportunity of the downtime to provision a new one.
My wife saw the controversy of the "B v 8" and instead chose to focus on "TINKY" - wondering if it was a nickname, acronym, anagram, or perhaps a literary reference.
At least 1976 reduces the timeframe of the search. The scope was clearly in existence by that date, and in the hands of some owner. I have been trying to think of what use a C8 could have in a radio station. Calling sporting events immediately comes to mind because I worked as a broadcast engineer in those days and we Broadcast Football and Basketball games as "Live Remotes" with a great deal of promotion and fanfare. Though, TV would seem a better fit than Radio - for a C8. Antenna maintenance and inspection is perhaps a less glamorous purpose, or even "FCC Antenna Proofs" - a process of taking signal strength readings while driving around the countryside in which a C8 could be helpful in verifying line-of-sight to the transmitting tower. (not that I ever did it that way...)
One must take care when interpreting call signs - the FCC re-uses and reassigns them so the KBEW of today may have no real relation to the KBEW of 1976, which goes for K8EW as well. A key question is always "Who had it on a particular date?" Talking to a re-assignee would be of limited value unless they happen to know something of a previous holder's period.
For example - I was dismayed to discover the callsign of my childhood HAM-operator-neighbor had been reassigned after his death before I could obtain it . Many hours were spent looking over his shoulder in his transmitting shack. Bob (W2AI) was into all sorts of things, including SSTV - an elite hobby in 1960s. The experience is probably responsible for my electronics career. Point is - today there is nearly no online memory of his time even though he held that callsign (from the 1940's?) to his death in 1980. It is currently on at least it's second reassignment since Bob.
But I digress -
Perhaps another avenue of inquiry is to research individuals with a recollection of Blue Earth Minn. in 1976-ish and get their recollections of KBEW activities.
It seems doubtful that an ordinary citizen-astronomer would dedicate their instrument to a Radio Station without more than fandom as a motive.
Still, since we have positively identified more than one example of these Axial-Std focus examples, and that leads us to believe there may be as many as 60 or more of them, a more salient question for the registry is the precise serial numbers of the various transition stages. If there is a re-converted (STD to Axial) example it would most likely be in the "Adapted" group prior to 396mm OTA.
Archeology was my alternate career choice after Electronics, as you may surmise. Is Astro-Archeology a thing?