Hi Folks,
by a "Print locator' I assume you mean a probe with an active
light source also mounted in it's nose so you can get reflections
back from black print on light colored paper.  You can therefore
tell where you've left off typing on a page and the like.  You
can't of course read with any such device.


If this is the case the Smith-Kettlewell Active Light Probe
does just that.  there is an infrared LED mounted next to the
phototransistor in the nose and they are angled in just a tiny
bit towards each other so that the best sensitivity is about half
an inch in front of the instrument.

This probe fits on the front of it's 9 volt battery and has a
sensativity knob on top.

It is made, in small quantities by our Director John Brabyn as a
side business and costs, i believe $45.00.

contact John by email at:
[log in to unmask]
or phone 415-345-2110

He is very busy, so if you don't get a quick response bug me and
I'll get at him.

the single disadvantage to this probe is that the active light
source sometimes creates reflections where you are trying to see
actual lights like pilot lights.  This can be confusing in some
situations.

A switch on the LED would have dramatically increased the cost of
the device.

tom WA6IVG

 


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