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From: Archon on 29 Jul 2010 19:20
On 7/29/2010 7:05 PM, Archon wrote:
> On 7/29/2010 2:07 PM, Paul Hovnanian P.E. wrote:
>> I'm looking for a couple of these to repair some (antique) equipment.
>> They
>> should be 1.5V, about 30mA and produce a relatively 'white' light at this
>> current. Some Radio Shack 6V, 100mA bulbs draw approximately the correct
>> current at 1.5V, but they are too reddish and dim to be of any use.
>>
>> These are used in an old photographic light meter as a null indicator.
>> LEDs
>> won't work at this voltage level (too dim and no where near linear
>> brightness vs voltage).
>>
>
> Ebay #> 120598027723
>
> Have to hack the cute lampshades off maybe?
> JC
or you could try

http://www.miniatronics.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=1_1

JC
From: David Nebenzahl on 30 Jul 2010 00:25
On 7/29/2010 11:07 AM Paul Hovnanian P.E. spake thus:

> I'm looking for a couple of these to repair some (antique) equipment. They
> should be 1.5V, about 30mA and produce a relatively 'white' light at this
> current. Some Radio Shack 6V, 100mA bulbs draw approximately the correct
> current at 1.5V, but they are too reddish and dim to be of any use.
>
> These are used in an old photographic light meter as a null indicator. LEDs
> won't work at this voltage level (too dim and no where near linear
> brightness vs voltage).

Is that meter by any chance a Gossen? the type with two bulbs that light
up equally bright when the dial is adjusted correctly? I had one of
those when I was a kid. Luna Pro?


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)
From: Spehro Pefhany on 30 Jul 2010 07:26
On Thu, 29 Jul 2010 11:07:21 -0700, the renowned "Paul Hovnanian P.E."
<paul(a)hovnanian.com> wrote:

>I'm looking for a couple of these to repair some (antique) equipment. They
>should be 1.5V, about 30mA and produce a relatively 'white' light at this
>current. Some Radio Shack 6V, 100mA bulbs draw approximately the correct
>current at 1.5V, but they are too reddish and dim to be of any use.
>
>These are used in an old photographic light meter as a null indicator. LEDs
>won't work at this voltage level (too dim and no where near linear
>brightness vs voltage).

Try a hobby shop that caters to model railroaders (lots of other
interesting stuff there too!)

Eg.
http://www.grsmicroliting.com/eshop/index.html?target=dept_5.html&lang=en-us
"1.5V and 3.0V Super GOR Bulbs"




Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff(a)interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
From: J. Todd on 30 Jul 2010 10:59
In article <Noadne83-tm2XszRnZ2dnUVZ_sKdnZ2d(a)posted.isomediainc>,
paul(a)hovnanian.com says...
> I'm looking for a couple of these to repair some (antique) equipment. They
> should be 1.5V, about 30mA and produce a relatively 'white' light at this
> current. Some Radio Shack 6V, 100mA bulbs draw approximately the correct
> current at 1.5V, but they are too reddish and dim to be of any use.
>
> These are used in an old photographic light meter as a null indicator. LEDs
> won't work at this voltage level (too dim and no where near linear
> brightness vs voltage).
>
>
www.cir-kitconcepts.com

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