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Thread: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

  1. #641
    ic-racer's Avatar
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    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Ok, this is what I see:


    The chassis is a L184

    The head is CLS1840 1000W

    The power supply is for the CLS2000 2000W.

    The fan is rigged up to suck.

    So, maybe you are correct, in that you have a CLS1840 modified to 2000W with the second fan being external.

    However, I'd be very scared to plug a CLS1840 head in to an EST2000N!

  2. #642
    ic-racer's Avatar
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    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Here are the pin-outs for the connector (EST2000 on LEFT and EST1000 on RIGHT). It does look like they may match up. Still scary.

    Click image for larger version. 

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  3. #643
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    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Quote Originally Posted by Michael Kadillak View Post
    I looked at the top of the light head and did not see how to get the halogen light out but it looks pretty big.

    Remove the two thumbscrews and the bar which holds the lamp will lift out. The lamp is not attached to the reflector.


    Click image for larger version. 

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  4. #644

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Thanks a bunch. The previous owner only turned it on when he acquired it over 10 years ago and never used it. That is why I am being so cautious. I will take a run and carefully removing the halogen lamp and see if it has any markings.

  5. #645
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    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    At first I thought the best thing would be for you to try an get a working EST1000 to match that CLS1840 head. But these things are so rare these days, maybe getting your two units working safely is the way to go.
    I presume someone did an "upgrade" to the CLS1840 head you have to make it 2000W and run with a 240V lamp and extra fan.

    First thing would be to really check the connections on the EST1000 vs EST2000 plug that nothing will fry in the CLS1840 head by plugging it into the EST2000. I posted a clip of the schematics, but you probably need the whole schematics. Did I ever send you the EST1000/CLS1840 schematic and service manual? If not I can send you that and the EST2000N/CLS2000 service manual.

    This is the kind of question that Jens (RIP) would be able to answer. Every time I contacted him he was very helpful and e-mailed back even more information than I asked.


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  6. #646

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Quote Originally Posted by ic-racer View Post
    At first I thought the best thing would be for you to try an get a working EST1000 to match that CLS1840 head. But these things are so rare these days, maybe getting your two units working safely is the way to go.
    I presume someone did an "upgrade" to the CLS1840 head you have to make it 2000W and run with a 240V lamp and extra fan.

    First thing would be to really check the connections on the EST1000 vs EST2000 plug that nothing will fry in the CLS1840 head by plugging it into the EST2000. I posted a clip of the schematics, but you probably need the whole schematics. Did I ever send you the EST1000/CLS1840 schematic and service manual? If not I can send you that and the EST2000N/CLS2000 service manual.

    This is the kind of question that Jens (RIP) would be able to answer. Every time I contacted him he was very helpful and e-mailed back even more information than I asked.


    Click image for larger version. 

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    Thanks for sharing your knowledge on this topic. I was told that this enlarger was refurbished at Durst USA some time ago and the original owner of it and the second owner (prior to me) never really used it. My friend that I got it from said that be was able to plug it in and it fired up. I am going to try to take out the bulb and see if that helps me figure out more of what I have.

    Retrospectively speaking I would have to agree that the work I would like to do with this enlarger is not mandated by a 2,000 watt bulb but until I can see what bulb I have (I was told it is a 1,000 watt halogen bulb but that does not appear correct) I am still looking for answers. Will report what I find shortly. Many Thanks!

  7. #647
    Drew Wiley
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    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Just make sure your wiring is up to that task. Nobody needs another Chernobyl.

  8. #648
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    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Quote Originally Posted by Michael Kadillak View Post
    Thanks for sharing your knowledge on this topic. I was told that this enlarger was refurbished at Durst USA some time ago and the original owner of it and the second owner (prior to me) never really used it. My friend that I got it from said that be was able to plug it in and it fired up. I am going to try to take out the bulb and see if that helps me figure out more of what I have.

    Retrospectively speaking I would have to agree that the work I would like to do with this enlarger is not mandated by a 2,000 watt bulb but until I can see what bulb I have (I was told it is a 1,000 watt halogen bulb but that does not appear correct) I am still looking for answers. Will report what I find shortly. Many Thanks!
    That would be another version of the story. That is, the EST2000 was modified to only power a 1000w bulb at 120V.
    I'd think changes to an EST2000 to reduce it to 1000W might be very difficult, compared to adding a new socket and fan to a CLS1840, I'll put my money on a 2000W lamp in the head. But let us know.
    If you can post more pictures of the lamp assembly that would be great.

  9. #649

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Quote Originally Posted by ic-racer View Post
    That would be another version of the story. That is, the EST2000 was modified to only power a 1000w bulb at 120V.
    I'd think changes to an EST2000 to reduce it to 1000W might be very difficult, compared to adding a new socket and fan to a CLS1840, I'll put my money on a 2000W lamp in the head. But let us know.
    If you can post more pictures of the lamp assembly that would be great.
    Thanks for the assistance. Will attempt the disassembly to see what bulb I have this evening. I saw the fan with the white plastic blades in the back of the light section. The fan fins did not look to me to be very large but maybe the motor driving it is a screaming meamie.

  10. #650

    Re: Durst L1840 Enlarger 8x10 10x10--Everything you wanted to know...

    Click image for larger version. 

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    I have attached some pics of my light head. I took the halogen bulb out of the globe and measured it. It is 3 3/4" long from the white base to the tip of the globe and is 0.9" (23mm) in diameter. The white electrical connecting wire does not really look that thick to me. The last pic is the special plug that I had to get a special receiving base plate to plug it in.

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