cooling fan on Durst 138?

[Luis-F-S]

the only thing i would like to improve is start time, although the halogen light that equipped the enlarger had the same or even longer start time i would like to reduce it, but it´s not a LED problem, it´s the Driver... and as it works with 220v to 32v i cannot put the timer between the driver and the led chip...rui lourosa

Maybe a compensating timer like the Metrolux or one of the RH designs would compensate for the start time of the LED. Pretty slick setup nonetheless. I have an extra CLS 301 head I may try something similar! L

[thomas ciulei]

you might want to think about a radial fan attached via a flexible pipe. radial fans draw a lot more air than regular fans. on my cls301 head thats what is used. Fan is mounted above enlarger, the flexible pipe also acts as a damper so vibrations d'ont transmit to head. It has a gigantic output to cool those 2x300w bulbs.

[ruilourosa]

I just used a couple of inexpensive computer fans...

[ic-racer]

You should start a dedicated thread to discuss that enlarger so more people can see it.

[Storformat]

Here are some photos...

Attachment 139451Attachment 139452Attachment 139453Attachment 139454

Hi,
Nice work
What kind of LED are you using. How many W?
If you would like to cool maybe a peltier cooler could be used. Or just have the Colling flanges on the outside.

BR
RIkard

[Luis-F-S]

I just used a couple of inexpensive computer fans...

Are you still using the CLS 300 head's dichroic filters and only replaced the light source, or is the LED source unfiltered? Also, can you post a link to the LED's, heat sink and driver? Thanks, L

[Tin Can]

Are you still using the CLS 300 head's dichroic filters and only replaced the light source, or is the LED source unfiltered? Also, can you post a link to the LED's, heat sink and driver? Thanks, L

But you don't acknowledge LED usage as viable. http://www.largeformatphotography.in...=1#post1354249

And mine for the Saltzman will happen on my schedule.

[Luis-F-S]

But you don't acknowledge LED usage as viable.

Still not convinced that it's a better mousetrap!

[Liquid Artist]

this is perfect timing bouncing this back up.
It looks like I am buying another 138 with the intention of modifing it for 8x10
So I will hopefully be trying some LED's or a cold light setup.

[ruilourosa]

Each LED chip puts out 600 watts, the dicroic filters work!!! they do not however filter in the same way!!

I´m hoping high CRI led´s to come out in higher wattage!