Need value for McIntosh 1500 stereo lamp

[Licensed to Quill]

I need a value for a McIntosh 1500 stereo lamp.

It is part of the circuit so I am reluctant to put one of the wrong value
in.

I went to Radio Shack and found a 28V 40mA with a similar mini-bayonet
fitting but McIntosh (who are otherwise usually very helpful) wouldn't tell
me what the value was: They insisted that I could go to a wholesaler and buy
a W1850 (which is what it says on the old bulb)

Licensed to Quill

 

[Fred Nachbaur]

I need a value for a McIntosh 1500 stereo lamp.

It is part of the circuit so I am reluctant to put one of the wrong value
in.

I went to Radio Shack and found a 28V 40mA with a similar mini-bayonet
fitting but McIntosh (who are otherwise usually very helpful) wouldn't tell
me what the value was: They insisted that I could go to a wholesaler and buy
a W1850 (which is what it says on the old bulb)

Licensed to Quill

The 1850 is a pretty common lamp, 5.0 volts at 90 mA. Listed in this
catalog:

http://www.sunraylighting.com/pdf/Catalog.pdf

There's also an 1850W version, which as far as I can tell is just a
long-life variant on the same thing.

HTH
Fred

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[proletariat]

I probably have some available for sale or trade around here, I have 1000's
of NOS bulbs.
it is $5 for the 1850, $8 for the W1850 (military industrial long-life
version) , now I just need to locate them in this mess!

the values are:

5.0V
..09A
..45W

wild bill

 

[Rich Andrews]

I need a value for a McIntosh 1500 stereo lamp.

It is part of the circuit so I am reluctant to put one of the wrong
value in.

I went to Radio Shack and found a 28V 40mA with a similar mini-bayonet
fitting but McIntosh (who are otherwise usually very helpful) wouldn't
tell me what the value was: They insisted that I could go to a
wholesaler and buy a W1850 (which is what it says on the old bulb)

Licensed to Quill

I looked at Mouser Electronics and they have 1850 lamps for $0.72 each. The
1850 is listed at http://www.mouser.com/catalog/615/85.pdf and they give all
the specifications.

If you are in a hurry you could call a TV repair shop that has been in
business for the last 30 years or so. They should have some around. Those
bulbs were quite common in older TV sets to illuminate the channel selector,
etc. It looks like the 755 could be a good replacement but YMMV.

r

 

[Sofie]

proletariat:
In your post you quoted:
#1850 @ $5
#1850W @ $8
What quantity of lamps do I get for the price?? .... is that the box (10
lamps) price?? Shipping from what location?

 

[Rich Andrews]

proletariat:
In your post you quoted:
#1850 @ $5
#1850W @ $8
What quantity of lamps do I get for the price?? .... is that the box (10
lamps) price?? Shipping from what location?
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Aren't the specs for the 1850 and the 1850W the same?


r

 

[Tweetldee]

Aren't the specs for the 1850 and the 1850W the same?

I think the "W" is a military designation, in which case it would be a lamp
with all of the same specs, but possibly having a ruggedized filament and
suspension.

Wait, I just looked them up in my 1976 GE miniature lamp catalog, and see
that they are, in fact identical in all respects except the 1850 has a note
that says: "Plane of filament within 30 degrees of perpendicular to base
pins". So it appears that the 1850 has a filament positioning spec that the
1850W does not have.
Looks like you could use either type in your application.

Cheers!
--
Tweetldee
Tweetldee at att dot net (Just subsitute the appropriate characters in the
address)

Time is what keeps everything from happening all at once.

 

[Sofie]

Tweetldee:
....... also, one of my catalogs indicate the "W" is as you said,
the military version, but it adds "extended life" to the note.

 

[My father's son]

Many thanks: Yes, that is the one. It says it is a 5 volt (so the 14.4 volt
and the 28 volt Radio Shack ones I have been given WON'T work properly)

It says it has some specific lumen value which I cant believe can be
relevant but also says curiously that it is rated at .000 amps whatever that
means

Licensed to Quill

 

[Fred Nachbaur]

Many thanks: Yes, that is the one. It says it is a 5 volt (so the 14.4 volt
and the 28 volt Radio Shack ones I have been given WON'T work properly)

It says it has some specific lumen value which I cant believe can be
relevant

No, it's probably only parrotting the spec sheet for the lamp.

but also says curiously that it is rated at .000 amps whatever that
means

Either it's a typo, or else they figured out a scheme to get free
energy, which was subsequently suppressed by the CIA.

Cheers,
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects, Vacuum Tubes & other stuff: |
| http://www.dogstar.dantimax.dk |
+--------------------------------------------+

 

[news.rcn.com]

Yes I kept repeating my V = I over Rs and the software kept telling me that
I had a potential perpetual motion machine OR was I running in a liquid
nitrogen enviromnent?