Durst M601 light source question

[metod]

I inherited Durst M601 enlarger with 2 beautiful Schneider lenses and CLS 66 color mixing head from a friend. It was a good timing as my old Opemus5 was starting to give me a trouble. I was like a little kid putting it all together this afternoon and made a couple of test prints. All seems to work well for now, it is a beautiful machine. I want to keep using the color mixing head for easier contrast control.
One thing I found out pretty quick was that the light source is much stronger than I’m used to. I did 5x7 print with f16, 30 magenta and it took only 15 sec to expose the paper. That’s too fast for me, especially when dodging and burning needed. It came with 100W halogen light, but since I am planning to buy spare bulb, I think something around 70W would be more suitable, taking the heat into consideration as well. Could anyone recommend me a bulb for this type of enlarger, and mainly where to get it? Would a regular halogen be suitable? I am not planning to do any color printing, at least not in near future. Thanks!

Metod

 

[Donald Miller]

Why do you want to change bulbs? Simply dial in some cyan to create neutral density if you need more time.

There is probably very little difference in heat generation if you replaced with a 75 watt bulb, if you could find one.

For information, my Saunders uses a 250 watt lamp. My Durst 138S has recently been converted to a 1000 watt halogen.

 

[metod]

Thanks Donald. So adding some cyan in addition to magenta or yellow should be OK? Then I’ll just leave it the way it is. But still, what about the replacement bulb if I need one?

 

[Marco Gilardetti]

Yes adding cyan would kick in some grey neutral density.

Is f:16 your last stop? Just close down to f:22 if you can.

Otherwise any halogen lamp of the same shape will do the work (they usually have a built-in reflector). I wonder if a 70W type exists at all, though.