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Sprague Vintage Glass Precision Resistor

Started by RDPipes, May 14, 2022, 12:09:10 PM

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RDPipes

I bought a lot of A&E parts, test equipment, miscellaneous, etc. about 20-25 years ago from a retired A&E technician dating into the 40's and earlier. Some of its gone now and some isn't. Digging around through whats left of it today and found this Glass Fuse? that I always wondered about. Anyone one know what its used for? It's 4000 ohm and still tests that. Its also marked with the maker Sprague and 40F 752E4025. I've seen my fair share of
fuses before but never a glass one this large. Can it possibly have anything to do with a phone system?
Is it a Cap or a Fuse, no voltage listed on it.

RDPipes

Gee! I thought at least one of you guys would have seen one of these before.

TelePlay

Maybe a 4,000 Ohm precision glass resistor?

Similar to this one 600 Ohm:

"Sprague Vintage Glass precision resistor 600 Ohm CSF-63071-F"

https://www.mercari.com/us/item/m14681536233


RDPipes

Quote from: TelePlay on May 18, 2022, 09:02:31 PMMaybe a 4,000 Ohm precision glass resistor?

Similar to this one 600 Ohm:

"Sprague Vintage Glass precision resistor 600 Ohm CSF-63071-F"

https://www.mercari.com/us/item/m14681536233



Bingo! That's a match sir, thank you!
Now to try and figure out what application is was used for, LOL!

Etienne

In 1908 Sprague associated with Thomson to produce trains for the Paris M├ętro. These trains remained in service until April 1983.
https://en.wikipedia.org/wiki/Sprague-Thomson
As far as I know, Sprague only built electric railway systems and elevators.
https://en.wikipedia.org/wiki/Frank_J._Sprague

TelePlay


RDPipes

Quote from: TelePlay on May 20, 2022, 06:54:13 AMDifferent Sprague.
Yes sir and they even made electric fans for a short time in the early part of 20th century if memory serves my right.