Hi Bob!
There are some links on the
FOPS Museums Page.
Also, the
FOPS Links Page has links to related sites, some of which contain listings of other sites.
I have some basic technical information on my website, some of which is specifically related to a Dean organ I operate (which belongs to George Houghton). You can view it at:
http://www.dsvc.co.uk/fairorgan/fairorganfaq2.html (click on the "Next Page" links to navigate through the pages).
I intend to add some technical information to the FOPS site eventually.