Re: Need Spencer AO10 power supply/transformer




"Tom" <tbaker@xxxxxxxx> wrote in message
news:1179161604.316713.185120@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On May 12, 10:00 am, bobmara...@xxxxxxxxxxxxx wrote:
I have two power supplies for this scope; if you have the dual-head
attachment, there's probably also an illuminated field-pointer in it's
"joystick"; originals came with a dual-plug, allowing you to power
both light and pointer from one power supply. Contact me if you're
interested - bobmara...@xxxxxxxxxxxxxx very reasonable price and
shipping (I have over 300 positive feedbacks, 100%, on ebay). I also
have a copy of the user's manual.

Bob Marable

On May 11, 6:58 pm, Tom <tba...@xxxxxxxx> wrote:

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

Well, I couldn't make contact with Bob, for some reason, but I did
find one of these transformers from another source, and sent payment
for it. It hasn't arrived yet. I'd still like to get the user's manual
for this microscope, too, so if I ever establish contact with Bob (are
you there, Bob?) I'll see if I can buy the manual from him.

Now my only worry is that when I get the transformer and hook the
scope to it, the bulb will be dead. Can anyone tell me a good source
of bulbs for this microscope? it would be good to get some spares
anyway. I found a website that has pictures of the parts manual for
the AO 10s, and it says that the bulb they take a "6.5V 2.75 amp
precentered tungsten lamp (GE 1460)".


You can get a 1460 from any good lamp supplier like Light Bulb Direct
(www.lightbulbdirect.com ).

Kevin Cunningham
SMS


.



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