"Iggy Drougge" <optimus(a)canit.se> said: Sorry, I have a really bad habit of boiling things down to as few words as possible. I really admirer people that can write emails that go on and on, for page after page. Anyway, before I get off the track, in 1924 a standards organization was formed called the Radio Manufacturers Association (RMA). In 1950, it became the Radio Television Manufacturers Association (RTMA). In 1953 it was renamed Radio Electronics Television Manufacturers Association (RETMA). And in 1957, it was renamed the Electronic Industries Association (EIA). Now, Bruce may have said RETMA out of habit when he meant EIA or these maybe racks from the mid-1950s. Why do I care? The mid-1950s were a time of rapid developments in the field of electronic analog computers. One company, Philbrick Researches developed an extensive line of power supplies, amplifiers, manifolds, and other analog computing components that made to be rack mounted. Cables interconnected the components in the rack. These cables used RETMA connectors. These connector are the diameter of and have pins the size of the base of a octal pin vacuum tube. Of course the pin spacing is different. I have a number of these components, but the connector are difficult to find. That's why my ears always perk up when I read "RETMA". I'm just nosing around to see if there is a bin in back of some surplus store were I might find connectors like these. And if anyone comes across any racks that have a tag saying "GAP/R", I would be VERY interested. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================