Re: DIY light source for 10X10" enlarger.

In article <R7SdnU6pz7oHcGHanZ2dnUVZ_quhnZ2d@[EMAIL PROTECTED]
>,
jjs <nobody@[EMAIL PROTECTED]
> wrote:
>To date I've considered enlarger light sources to be engineering well
beyond 
>my feeble capability, but I have used and examined only condenser
enlargers 
>such as the Leitz IIa and Omega condenser enlarger, but my task now is to

>make a diffusion thpe for the 10x10 enlarger.
>
>I want something with No built-in filtration. No fancy color mixing for
VC 
>papers. No electronics. No side-lit mixing chambers. Just a straight
forward 
>light source and a diffusing layer. I question cold light, mercury va****,

>tubes, whatever they are because I just don't plain understand 'em.

A fluorescent light source of some kind -- a "cold light" source -- will
give you the most light for the least power (and heat) unless you really
want to use a *lot* of white LEDs.  I'm not sure you can get enough output
from a 10x10 grid of LEDs you assemble yourself to give decent enlarging
times with a 10x10 negative, and I am also skeptical that it will be as
even as you'd get with an array of fluorescent tubes.

-- 
  Thor Lancelot Simon	                                    
tls@[EMAIL PROTECTED]
  "The inconsistency is startling, though admittedly, if consistency is to
   be abandoned or transcended, there is no problem."	      - Noam Chomsky