Taylor Hobson Inclinometer bulbs

rimcanyon · Feb 1, 2009

What are the best light bulbs to use in a Taylor Hobson 142/44 Inclinometer? I have been using GE 502's, but they burn out in about 3 hours of use (the one that illuminates the bubble). The bulb that illuminates the scale lasts a very long time.

-Dave

Forrest Addy · Feb 23, 2009

Have you considered refitting the lamp house with an LED? Many colors including white. It will take some mods but that's no real obstacle. You might need a diffuser. My Davidson sutocollimator works fine with an LED pend ligh plugged into the lamp house. They do take DC power.

Here's an embarrassment of rights.

http://business.shop.ebay.com/items...mfsb=&_trksid=m270.l1313&_odkw=&_osacat=12576

rimcanyon · Feb 24, 2009

Hi Forrest, thanks for the suggestion. I have thought about it. I used the same solution for my Leitz autocollimator. I bought some LEDS that were designed to screw onto Schrader valves (for car wheels), that take an AAA battery, and just turned the OD to fit. However, in that case the orig. light was missing, but I have all the TH inclinometer bits and pieces.

After thinking about it some more, I think the simplest solution would be to run both bulbs from the same power supply, the one that doesn't burn the bulbs out.

Dave

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