general info

incandescent - miniature lamp light bulb
donsbulbs part:
1817MB USA
inventory check: sold out
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1817MB USA

bulb specifications:
category: Incandescent - miniature lamp
volt: 13
amp: 0.4
watt: 5.2
base: BA9s - Miniature Bayonet
glass: T3-1/4
filament: C2R
fil.res.: 32.5 ohm
m.o.l.: 1.22 inch (31MM)
l.c.l.: 0.63 inch (16MM)
d.hours: 50
notes: clear glass
specs verified against ANSI-SR25D1997
uses sockets:DB-17-20

typical shape of T3-1/4 glass envelopes
(not to scale)

typical shape of C2R filament
(not to scale)

industry standards for base:
BA9s - Miniature Bayonet
(not to scale)
click for base BA9s detail sheet

Don's grand wisdom: When multiple bulbs are in a circuit; if one bulb burns out, you really should replace all bulbs at same time. This way all bulbs will look the same. Otherwise, mixing "used" bulbs with "new" bulbs (or mixing brands) will each look different (some will be dimmer, some a different shade of color.) For example, automobile headlights and tail-lights must always be replaced in pairs or they will look odd. And, when one bulb is at it's end of life, the other will be near it's end of life too. Keep good working "used" bulbs as emergency spares.

Although few specialty light bulbs and sockets are manufactured anymore, I have decent inventories of most types in stock, plus additional sources for nearly everything. All are guaranteed brand new, most being NOS (new old stock). Shelf life is forever.

Prices usually rise as inventory is sold off. Website updated daily to reflect current stock and prices. Click add to cart button above, and order at today's prices.

I don't guarantee brand (or country) of manufacture, but you are welcome to suggest a preference. If you do require a certain brand or specific country of manufacture; read my general information.

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Definition of light bulb refers to lamp.
Definition of socket refers to lampholder (lamp holder).

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1817MB USA

also known as

1817/13V/0.4A USA
1817 USA
1817MB USA
I/13V/0.4A/BA9S/T3.25/CL/31MMMOL/50H/1817MB USA
I/13V/0.4A/BA9S/T3.25/CL/31MMMOL/50H 1817MB USA
I/13V/0.4A/BA9S/T3.25/CL/50H/1817 USA
I/13V/0.4A/BA9S/T3.25/CL/50H/1817MB USA
I/13V/5.2W/BA9S/T3.25/50H/1817 USA
I/13V/5.2W/BA9S/T3.25/CL/50H/1817 USA
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1817MB USA

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manufacture name:  Bell & Howell
model number #:  1480
model name:  Multi-Motion
size:  8mm
type of equipment:  projector
notes:  only the green one
comments:  any comments