Talking Jobo for 5x4

steveo_mcg

steveo_mcg

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Folks, the Jobo System has me confused. I've been using the patterson colour print developer and it does a decent job with tiny volumes of chemical but sitting around for 8 minutes twirling a handle gets old espciallly when you're trying to keep the speed consistent...

SO Jobo motor base, tank and spiral for b&w 5x4; what are my options? Do they all use the low volumes of chemicals Jobo systems are famous for?
 
yes

although the paterson orbital uses even less and is perfect for B&W , hopeless for E6 and usable for colour apparently
 
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essexash said:
yes

although the paterson orbital uses even less and is perfect for B&W , hopeless for E6 and usable for colour apparently
Click to expand...

Cheers ash, I'll add that to the investigatory list.
 
You are asking specifically which bits you need ?

2509n reel
2520 tank onwards

Often enough you will see confused people selling the "rare" reels for more than they are available new

http://www.firstcall-photographic.co.uk/products/831/jobo-developing-tank-2509n-reel

Thread on LF info with a few bits of useful info http://www.largeformatphotography.i...1185-Combi-Plan-vs-Jobo-2509N-Sheet-Film-Reel

no doubt a million others on there.

If you are looking for economy and consistency dip dunk and replenishment which granted may not suit if you do not have a darkroom

Datasheet for 2500 series http://www.firstcall-photographic.co.uk/pdf/pdf3756.pdf

1500mL inversion 270mL rotation minimum volume

You might want to note the comments in the LF info thread with regard to the processors giving consistency but the roller base not
 
Thanks @abbandon and can I use any base with these? My Patterson print processor does an adequate job but sitting for 10 minutes consciously trying not to turn the handle too quickly gets old! I don't have any where I can make dark so I'm limited to light processing gear and my volumes are pretty tiny any way.
 
Any roller type base should be usable I guess there are people who apparently hand roll the tanks but the point made in the large format info thread by some was that they only got consistant streak free results when they switched to a Jobo processor where on the film setting the rotation is reversed.

If you sulk around ebay it is often possible to grab a bargain on Jobo's if it is a collection only and it is some where near enough you or sold as seen going cheap were a non photographic seller doesn't understand the machine and has often tried it dry only for the thermal trip to go and they do not know how to reset it.
 
So managed to acquire a 5x4 spiral, a 120 spiral and the 2500 tank still looking for a base. Though I'm not sure I've got space for the cpe base so I'm now thinking I'll need to do it manually at first and look at the motor system later.

Problem I have now is that the tank has an open top with a cog, presumably for the motor base.
 
This should not be a problem as you are not intending to process by inversion anyway, with the required volumes for rotary processing it is never going to slop out of a cog lid.

There are three types of lid the standard lid with a cap and two types of cog lid the one for the Duolab and the much more common one for the processors with a lift.

The Duolab processor drives the cog directly the other processors either use a magnet drive to the base or to the standard cog with the lift.

All the parts of the lid are modular by the way either of the cogs can be removed - if you look closely you will see it is two mouldings and not one - if you remove it you can just fit a cap.

Same applies if you have a breaker in the lid rather than a funnel the breaker is for print drums while the funnel is for film tanks they twist out and can be swopped.

Either MrCad or All photos general have these bits as old stock spares.

The best lid is the Dulolab one as these also have an internal thread which matches the Jobo bottles making for fast easy solution changes.

You should be fine with what you have but if you feel you need a cap drop me a line and I can post one to you.
 
Sorry @abbandon, missed this. Thanks for the input, I'm still trying to decide what to do about a base.

Does that does explain why the lid sticks outwards, sort of an inverse funnel.
 
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Yes as its designed to quickly pour out the solutions one way or other.

The very basicroller base still seems to be available new

The price isn't insane but then its not cheap either for what it is.
 
abbandon said:
Yes as its designed to quickly pour out the solutions one way or other.

The very basicroller base still seems to be available new

The price isn't insane but then its not cheap either for what it is.
Click to expand...

Yeah, not bad not great but better than rigging up some castors on some mdf.
 
Got the base, very light plastic that should probably be bolted to somthing but it'll do until I get space for a full sized unit. Wonder if film will still be available when I kick the kids out to uni...
 
Well that was a good baw ache, rollers kept slipping on the table. Negatives look very dark but I'm not sure if they're over exposed or over developed, cut times by 10% may need to cut it some more.
 
I've been looking at Obsidian Aqua, a pyrocat type staining developer which doesn't respond well to continuous agitation. so I've been considering inversion processing, the stuff is cheap so using 3ml instead of 1 isn't a big deal. I've had a look at the cog lid and can't work out how it comes off, is it really just a brute force issue?
 
Pretty much yes

Standard lid for inversion / cap

Duolab cog insert

Two about to be joined

Complete Duolab lid

1500 series cog lid for reference

Why the Duolab cog lid is the most useful


I can hook my thumb through the Duolab lid I had to hand and easily pull the insert out and easily snap it back together.

I am however prepared to admit that 1500 lid pictured is much more reluctant to come apart.

Usual tricks with warm water maybe even dirty WD40 or something to try and lubricate the O ring you can see in the pictures.
 
Cheers mate, got the two parts separated through the judicious application of gravity. Put a bottle in the cog lid and leant on the rest of it, I have a lot of gravity to exert!

The opening is enormous, if I'd not seen your pictures I'd be worried I'd goosed something.
 
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