I';ve still got a rather trashed Edmunds 6" reflector, I believe from the mid 60s, tube length is just about 48" so I assume the FL is similar,which would make it f/8. 1.25" rack and pinion focuser, single stalk secondary. primary mirror has a sticker on the back that says UPCO Optics
everything ferrous is pretty rusty, everything alloy is somewhat corroded/pitted, and the otptics would need replating, but I think its resurrectable. the cast iron eq pier mount is intact but also corroded/rusty. it has the 120V 60Hz AC synchronous clock drive motor, but the motor and gearing are probably beyond resurrection. any plastic bits on the mount like friction washers are toast, too.
I'd give this away to someone who wants to meet me in the santa cruz, california, area.... sorry, I lost the box of original eyepieces, they weren't very good anyways.
UPCO Optics is a kind of mystery company. Edmund mirrors with that sticker are known to be very good.
Legend has it that UPCO Optics is a nom de plume of a gentleman by the name of Ed Bailey. He was a member of Philadelphia’s Rittenhouse Astronomical Society and also had connections with the Franklin Institute, also of Phila.
The story goes that Ed made and carefully tested the mirrors at that time for Edmunds, and possibly Criterion. He was, in fact UPCO Optics. He also taught ATM mirror making classes at the Franklin institute. Paul Rini would know more if he stops by.
He was said to be very skilled and carefully tested and certified each and every mirror. The sticker certified the optics at a true 1/4 wave, which is actually very good and considered to be diffraction limited, a term that became popular after the infamous optics wave wars of the 70s and 80s. Claims of 1/8, then 1/10, 1/20 wave accuracy were ascribed to mirrors and scopes as tested by the advertising departments of various companies fighting for the upper hand.
When the claims got to the ridiculous stage, I think the combatants dropped the specific fractions of a wave and ceased hostilities by claiming diffraction limited.
In any event, if I lived near you, I’d swing by. But 3000 miles is a little too much of a swing by drive for me. If you can’t find anyone, you may consider parting it out. The UPCO mirror, even in poor coating condition is something of a collectors item. And many would like to get some of the other parts also.
The mount is also a popular item to sell, but, of course expensive to ship. Even the clock drive, in questionable condition would get interest at the right price.
Something to consider.
Edited by Joe1950, 02 September 2019 - 03:57 AM.