Support Astromart! | Log In | Help
Astronomy NewsTelescope ClassifiedsTelescope AuctionsTelescope Articles & ArticlesTelescope Articles & ReviewsTelescope and Astronomy ForumsAstronomy Events Calendar
View Categories
Browse By Location
Place A New Ad
Display Preferences
Search Classifieds

User Name:


Save Login
New to Astromart?
Register an account...

Terms of Service
Privacy Policy
Help & FAQ
Astronomy Links
User Profiles
Top Users List
RSS Feeds

Home > Classifieds > Astromart Classifieds > Telescope Making > Classified #290022

For Sale: The remnants of Bob's Folly--SOLD

Please Log In to view the details for this classified ad.
Don't have an Astromart account? Click here to create one

Back in the 80s I decided I needed a homemade planetary reflector, so I made a 6" F12 spherical mirror--my very first mirror. It turned out pretty well, so I bought a 3/4" secondary from E&W--high contrast, don't you know--and glued it onto a bent-metal secondary holder. Crazed with success, I mounted the optics in a hexagonal 3/4" cherry plywood tube, complete with baffles and brass end protectors. It weighed easily 25 pounds.
Since the tube was so heavy it balanced in the middle. You can see what's coming: the dob mount for this 75" tube was about 40" tall. The whole thing came to 60-70 pounds. After it sat unused for a few years I moved the trunnions toward the mirror end and gave it to my engineer son with instructions to velcro a bag of shot to the tube to balance it. But no. The loon decided that adding metal plates would be more elegant. Now nobody can lift it. He finally gave it back and it's been in my garage for 10 years.

Lucky you. The OTA is on the fire pile but the parts are for sale (all prices plus actual shipping):

. 6" F12 mirror with slightly turned edge, masked down to 5.5" F13.5. I just cleaned it and it does NOT need recoating. Take a chance for $15. SOLD
. 6" NOVAK cell $25 SOLD
. 3/4" E&W secondary in holder, no spider. Also does NOT need cleaning. $20 SOLD
. NOVAK helical focuser, 2" with 1.25" adapter, plug. Very smooth, 1.5" draw, nicked. $40? SOLD
. Interesting 50mm finder bracket, extremely robust. $10 SOLD
. Uninteresting 50mm RA finder, takes 1.25" eyepiece that you supply. With caps, dented tube and decent optics $15 SOLD

Email for a really big picture.

Back to Listing

All times are in (GMT-8:00) Pacific Standard Time Zone  
Astronomy News | Telecope Classifieds | Telescope Auctions | Telescope Reviews | Telescopes | Telescope and Astronomy Forums | My Account | Help | RSS