Re: Need Spencer AO10 power supply/transformer
- From: "Kevin Cunningham" <smskjv@xxxxxxxxxxxxxx>
- Date: Sat, 12 May 2007 14:01:07 GMT
"Tom" <tbaker@xxxxxxxx> wrote in message
news:1178924306.451769.78810@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I just bought a microscope at an auction to use for family fun and
education, an old Spencer AO10 dual-head teaching microscope that is
probably at least 30 years old, but appears to be in fine shape. The
neat thing is that with the double binocular head, two people can
examine a specimen at the same time. We have already tried it out by
illuminating slides from above with a goose-neck lamp, and both sets
of eyepieces seem to work well.
But we can't yet light the illuminator bulb on the bottom of the
scope. This illuminator is not the kind that you can just plug into
the wall--it needs a transformer or power supply. I found a website
that has the AO10 manual (photographs of the pages) and parts list for
the AO10 series, and a page in the manual shows this little
transformer box with a knob on the front, which it describes as "an
external, five-step transformer 115V to vary brightness of the 6.5V
2.75 amp precentered tungsten lamp (GE 1460).
So, apparently it's just a little 115V, 60Hz transformer for a 20-watt
bulb. I did a search on eBay and elsewhere on the web, but I cannot
locate anyone selling one of these AO10 transformer/power supplies.
Do you suppose a little model railroad transformer of the kind they
sell at hobby stores (such as Hobby Lobby) to power HO trains would do
the trick?
If that wouldn't work, and if I can't find the factory-made
transformer for sale anywhere, does anyone have any idea how I can
power this illuminator?
Any advice appreciated.
Tom
Tom, Ludl (www.ludl.com) makes a very good power supply but it is a bit
pricey, mid $400's. Try your local microscope repair person, over a million
of these were made by 1972 when they were discontinued but not a lot of them
are still alive, they tend to fall apart. However there are still a bunch
of good ones. If some one is selling a 10 e-mail them and ask if they have
any transformers, it can't hurt!
Kevin Cunningham
SMS
.
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