Re: Roundshot Enlarger ain't the only one!

[George Pearl <alps007@xxxxxxxxxxxxxx>]

Dear Sam,
   I haven't drawn up the plans yet, as it has been an on-going-engineering
type project. We would do something and then see how it would operate. If
it didn't work right we would change it to do better etc. 
    The 4,500 watt color head is made as an additive head with 12  360 watt
82v projector lamps. It is all voltage stabilized  at whatever setting is
made. There are 6 dicroic red filters, 4 green, and 2 blue. All lamps look
up into a round white mixing chamber bowl at a 45 degree angle where the
lights & colors are mixed together and reflect back down through the
negative. The head is another thing that I really wouldn't want to have to
ever make again if I didn't have to. Just engineering how to take care of
the heat being produced was enough to drive a person to drinking. 
    If the IAPP shall see fit to allow me to present a program or two at
the next meeting, then I will demonstrate these things in detail at that
time with handouts available for those interested in trying their
construction skills.

My best,
George :-)


At 01:08 PM 12/1/98 -0500, you wrote:
>Not a member but would be interested in plans..
>How did you build the 4,500 w Color head???
>Sam Welch
>-----Original Message-----
>From: George Pearl <alps007@xxxxxxxxxxxxxx>
>To: panorama-l@xxxxxxxxxxxxxxxxx <panorama-l@xxxxxxxxxxxxxxxxx>
>Date: Monday, November 30, 1998 9:30 PM
>Subject: Roundshot Enlarger ain't the only one!
>
>
>Dear Group,
>   I have been constructing a prototype scanning enlarger here at ALPS Labs
>in Atlanta, Georgia, that I will be testing very shortly (this week I
>hope). It is designed to carry up to 30 inch paper, and has a glassless
>negative carrier that will accommodate 35mm thru 70mm film sizes. The whole
>scanning enlarger just rolls / shoves under a Beseler 4 x 5 enlarger. All
>scanning movement operates from the power and drive of one motor. Variable
>size enlargements can be made as normal with the movement of the enlarger
>head up or down. Also any roll paper size up to 30 inches can be used. I
>don't think that I will be willing to make any more of these for resale,
>but for those members in good standing of IAPP, I might be willing to share
>some plans.... These are alot less trouble to build yourself than an
>airplane. We have worked on and off again on this one for only 2 years or
>so.
>   Perhaps I will add this to my lecture at the next conference if I ever
>get on the program?!!! (of course if it works that is)  That would be your
>call if you want to see how it works. I also built a 4,500 watt color head
>for an 11 x 14 Saltzman Enlarger. I have been printing my 70mm film on it
>for prints on the baseboard up to 48 inches. The head is powerful enough
>for exposures of f16 at 10 seconds for a 30 x 40 inch color print. So, you
>see, there is more than one way to skin a cat!
>My best,
>George Pearl
>
>
>
>
>George S. Pearl, FEPIC, CEP, CrQDEHE, BS
>  President:
>    Atlanta Legal Photo Services, Inc., dba
>    ALPS LABS
>    2139 Liddell Drive
>    Atlanta, Georgia 30324-4132
>Tel: 404-872-2577 w.
>Fax: 404-872-0548 w
>Dispatch Pager: 770-579-4125
>Home Tel: 404-634-2577
>   "http://www.ALPSLABS.com"
>ALSO!...As a division of ALPS....
>        Atlanta Panorama
>"http://www.AtlantaPanorama.com"
>E-mail: George@xxxxxxxxxxxxxxxxxxx
>
>
>
>
>
George S. Pearl, FEPIC, CEP, CrQDEHE, BS
  President:
    Atlanta Legal Photo Services, Inc., dba
    ALPS LABS
    2139 Liddell Drive
    Atlanta, Georgia 30324-4132
Tel: 404-872-2577 w. 
Fax: 404-872-0548 w
Dispatch Pager: 770-579-4125
Home Tel: 404-634-2577
   "http://www.ALPSLABS.com"
ALSO!...As a division of ALPS....
        Atlanta Panorama
 "http://www.AtlantaPanorama.com"
E-mail: George@xxxxxxxxxxxxxxxxxxx