So the problem was elsewhere.

Carefully checking the circuit board with a multimeter revealed another suspicious component: the diode rectifier, whose DC output was wild. These things don't age well, and this one was about 30 years old...
🧵 3/5

After a quick intervention with the soldering iron, #RightToRepair wins the day and my old #Jobo #CPE2plus plus friend is as good as new!

It's just great to get such an old beast in proper working order again, without having to break the bank buying a replacement!

This is now my standard dev method for #35mm, #6x6, #4x5 and #11x14.

My beloved home-brewed #510pyro works beautifully, with super-consistent results with all my standard films.

So if you *can* repair, *do*!

🧵 5/5

@s2art nice; indeed #Jobo tank hand processing w/o the machine is something I've also done a lot (before repairing the beast).

#Xtol is great, on my side I've used lots of different things but converged on #PMK and now #510pyro which I consider the best film dev I've ever used. Superb highlights, deep shadows, and great for both normal silver as well as carbon printing.

For paper dev, for environmental reasons I've shifted to Vitamin C-based ones like Moersch 4812 https://www.moersch-photochemie.de/content/shop/positiv/110

@s2art for #PMK and roll film in a tank, my experience was that I would get streaks if I machine processed, but not if I hand processed. For #4x5 in a tray, I could limit the streaks.

With #510pyro my experience is that the streaking is just completely absent, even if I machine #Jobo it. So now everything #35mm, #6x6, #4x5 and #11x14 gets the same treatment, and my calibrations are holding.

@jscaux @s2art I'm processing C41 film in a minilab, ie under rotation. I appreciate the ability to precisely control the temperature of the chemicals. For black and white I use a regular tank for both 120 film and 4x5 sheets.

My black and white workflow is not fancy though. I mostly use Rodinal for simplicity.

@s2art @jscaux for hand development I am using Paterson tanks with the MOD 54 film holder for 4x5 sheets. That one holds up to 6 sheets and after trying often enough, placing them correctly in the bag works pretty fine.

I do not use rotation for manual development but "shake". I use the massive dev chart for timing.

The same holder also fits into my mini lab which is a Tetenal Film Lab (or, Durst Filmetta) which is small but works really nicely. I use that one for C41/E6 only.