T3D Re: letter codes and projection bulbs

[Rob <lilindn@xxxxxxxxxxx>]

 bobh@xxxxxxxxxxxxxxxxxx wrote:

<snip>

> e.g  1000 watt, 120v T-12, med. pref. base C-13D filament.
>  T-12 was tubular 12/8th inch diameter, Med Prefocus base was
> keyed twin ears (vs B&H or bayonet in smaller lamps) C-13 D was
> Coiled filament in 13 rows double layered i.e 6 and 7 lined up to fill
> the space. So the 3 letter code made it easy to find just the right
> one by looking at code on old one.

This is useful - though I am curious as to what "medium prefocus" means,
as well as "true focus". 

>  I have been away many years (1955) from Westinghouse Lamp
> Division (now owned by NORELCO). But I see the problem as not
> having a list of lamps. Makers used to put out lamp catalogs for
> projectors etc. and ANSI should have a list of the 3 letter codes
> and what they mean. I will take a search engine look to see if I can
> find ANSI lamp codes. BobH

   Good luck.  Wiko does have an online engine with some information,
but only for lamps they currently sell (if the lamp is currently
available new, I dont really need the information :-)
> 

 Tom Hubin <thubin@xxxxxxxxx>  wrote:
>
> This is the case with replacing the TDC716's 750watt DDB lamp with a
> quartz halogen 750watt BTP lamp. The DDB lamp has a 10mm square
> filament. The BTP lamp has a 10mm x 14mm filament. The result is dimmer
> than if you used the 500watt CZX lamp with the 8mm square filament.

   While we're on quartz, I once saw a quartz bulb installed in a
Sawyers 2D job - but couldn't find the code on the bulb, anyone know
what the quartz version of the DAK is called?
> 


> 
> I have been told that the ANSI specs for lamps can be bought but not
> copied. If they can be had cheaply and legally I would like to have the
> specs myself. It would help me to design or modify projectors.
> 
>
     Sounds like its time for me to get to work on that future website
I've always been talking about!
     If I were to take contributions from individuals who actually
measured (physically and electrically) the various bulbs, could I post
the information on the net, or would ANSII cite "DDB", "CZX" and "DGA"
as its trademarks??

   Rob
   "Everything I have is Y1.96K compliant"