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Thread: Jobo 2840 drum for film

  1. #11
    All metric sizes to 24x30 Ole Tjugen's Avatar
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    Re: Jobo 2840 drum for film

    I do all my larger (larger than 4x5") sheet films in 2830 and 2840 drums, and have also found unloading in water to be the best way.

    I prefer to keep the clips in - getting 5x7" slides damaged from overlapping film during processing is not fun. The clips stay.

  2. #12

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    Re: Jobo 2840 drum for film

    Quote Originally Posted by Gregg Cook View Post

    a 2830 might work better. they use less soup.
    Which might be a problem depending on your developer. The 2840 uses so little that for most people they'll be far over the lower limit on chemicals.

  3. #13
    Joanna Carter's Avatar
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    Re: Jobo 2840 drum for film

    Quote Originally Posted by Fred Lum View Post
    No sticktion to the drum.
    OK Fred, so now I have a new word to my vocabulary

  4. #14

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    Re: Jobo 2840 drum for film

    Quote Originally Posted by Joanna Carter View Post
    OK Fred, so now I have a new word to my vocabulary
    You can find it in the `Stickionary`.

  5. #15
    ic-racer's Avatar
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    Re: Jobo 2840 drum for film

    I just wanted to add my recent experience to this thread.

    I obtained both the 2830 and 2840 drums for about $65 and connected them together. The 2840 is actually a 2870 extension with the little 2820 test drum bottom. So I rearranged to make the 2850, which is a 2870 with a 2830 bottom. And I had a little 2820 drum left over.

    The 2850 drum holds 4 sheets of 8x10 (vs five in the expert drum) and I believe the 2820 drum will hold 2 sheets of 4x5 but have not tried it yet.

    I'm using 260 cc chemistry and results are excellent. Very even development. No clips. Washing in the drum. No problem getting the film in or out. Photoflo in a separate 8x10 tray. The 2850 drum on the Jobo lift can easily be lifted by pushing on the 'heel' of the lift, eliminating the need to lift up with the fragile handle.

    I like my 4x5 expert drum but don't see any need in looking for an expert drum for 8x10.

  6. #16

    Re: Jobo 2840 drum for film

    Sorry to bump this but I think I am about to recieve a 2840. At first I was super excited knowing that I could process some 8x10 in a drum but it seems you guys are a little indifferent on the matter. When the time comes, I will definately use the water approach.

    My question to all of you who actually use the 2840, how does the film actually fit in the drum? I have read some can develop 2 sheets at once? Is this advisable?

    Thanks guys.

  7. #17

    Re: Jobo 2840 drum for film

    Just a caution about pyro and a drum with ribs: uneven staining can occur, especially and dramatically with Max-Pyro. Not so bad with PMK. When my motorized tray gave up the ghost I tried the drums on my Jobo and got the bad news. Worked fine with Rodinal. I ended up with a 3005 and a Beseler base for 5x7 and 8x10 with no problems. Another motor base (Chromega?) didn't work so well.

  8. #18

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    Re: Jobo 2840 drum for film

    Quote Originally Posted by ic-racer View Post
    I just wanted to add my recent experience to this thread.

    I obtained both the 2830 and 2840 drums for about $65 and connected them together. The 2840 is actually a 2870 extension with the little 2820 test drum bottom. So I rearranged to make the 2850, which is a 2870 with a 2830 bottom. And I had a little 2820 drum left over.

    The 2850 drum holds 4 sheets of 8x10 (vs five in the expert drum) and I believe the 2820 drum will hold 2 sheets of 4x5 but have not tried it yet.

    I'm using 260 cc chemistry and results are excellent. Very even development. No clips. Washing in the drum. No problem getting the film in or out. Photoflo in a separate 8x10 tray. The 2850 drum on the Jobo lift can easily be lifted by pushing on the 'heel' of the lift, eliminating the need to lift up with the fragile handle.

    I like my 4x5 expert drum but don't see any need in looking for an expert drum for 8x10.
    Regarding the 2820 Drum
    Actually if you got the 1520 drum you can switch the funel/cup in the lids of the two, take the centerpost, add an 2509n reel and can do 6 sheets of 4X5" in your 2820/2520(in discuise)
    Best regards
    Søren Nielsen

    Send from my Electronic Data Management Device using TWOFingerTexting

  9. #19
    ic-racer's Avatar
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    Re: Jobo 2840 drum for film

    Quote Originally Posted by soeren View Post
    Regarding the 2820 Drum
    Actually if you got the 1520 drum you can switch the funel/cup in the lids of the two, take the centerpost, add an 2509n reel and can do 6 sheets of 4X5" in your 2820/2520(in discuise)
    Best regards
    Interestig. I do see that the 2800 drums do have the groove at the bottom to hold the center post.

    Just to update my experience with the 2800 drums. I have been doing four 8x10 at a time and have done about 50 sheets that way and am even getting an extra 2800 drum to do 8 sheets with back-to-back processor runs (without having to dry and re-load a single drum).

  10. #20

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    Re: Jobo 2840 drum for film

    I run 5x7 and 13x18cm in the five cavities of a 3005 Expert Jobo, and had the same problem until I got a hemostat -- that surgical tool with tweezer jaws on a sissors handle -- and grabbing the film on tiniest corner can drag it out no matter how tightly it sticks. A millimeter or two of the corner is totally chewed up, of course.

    Before I got this, I was peeling the film off the cavity wall with a sharp pencilpoint, but often my fingers were not long enough to grasp it.

    Skip Roessel

    "If a thing is worth doing, it is worth doing badly."

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