As an experiment I tried cleaning an old Compur shutter on a
Speed Graphic using contact cleaner. The stuff I used is Deoxit 5
made by Caig labs. It seems to have worked well but I won't be
sure for a few days. I applied it with a small brush. The shutter
had been cleaned years ago but was running slow. Its now exactly
on speed according to my Calumet shutter tester. Its been a day,
enough time for the volatile parts of the cleaner to have
evaporated. Electrical tests I've made indicate the stuff does
not leave a conductive residue but it may leave some sort of very
light lubricant. Don't know. At any rate the stuff is a lot
easier to obtain than real clock oil (Nye is the best).
This is a curious camera and I am researching to find out
more about it. It is an "Anniversary" Speed Graphic, one of the
first of that series according to the serial number but its
different from later ones. The box is shallower, the same size as
the previous "side handle" Speed Graphic and has some other
differences. The serial number dates it from early 1940 and the
lens, which I am pretty sure is original, dates from 1939, about
right. This was my first Speed Graphic, bought many years ago.
I think I may have used the contact cleaner on a Rolleiflex
shutter several years ago and that seems to have kept working.
Anyway perhaps of some use to someone.
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
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