I need some to restore some old telco equipment. The bulbs are a slide base,
but longer. The above lamps are 1-7/64" long (28mm). The lamps I need to replace measure 43mm.
These things are OLD. The above Grainger bulb has a plastic wedge-shaped base. The base of the lamps in this old equipment are wood.
Any ideas on sources or even the proper size/type name?
Can't remember what they were. Used to fix cord boards in late 60's + oldest I repaired was a Stromberg Carlson rebuilt in 1943, the year I was born ! The lamps used in telephones are 52a and still available. The only thing I can suggest is an led with a series resistor to limit current and change brightness. Found this site
I searched for old telephone switchboard lamps or parts for old telephone switchboards
I'm in the process of bulk disposal of my old shop stock, as you can see from the last update date
Look for "Slide Base T6.8". For example SM2420G (24V 0.5W) are in stock at Mouser.
T-2 bulbs measure 1-11/16" in total length. You are looking for 24C1 Telephone and Indicator bulbs according to my old light bulb spec guide. They are rated as 0.06 - 085A, 1900 Footcandles, average cold resistance
33R, hours life = 5000.I might have those in my ancient parts stock if you can't find them elsewhere.
At least you know what you are looking for now!
John :-#)#
And here are some!
John :-#)#
Last time I had one of these fail, I soldered a led in the metal part.
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