Would someone please recommend a fairly simple timer for enlargers?
I am currently using an very old electronic timer (analog) that is neither accurate nor consistent. I have to check its setting against my watch to make sure it is set correctly.
I'd like to have something that will be accurate to, and readable to a second, do up to 60 seconds at minimum, have an ability to repeat the same setting multiple times, and cost as little as possible.
If you're are looking for a new darkroom timer anyway, it may be a good opportunity to start with f/stop timing and look for a timer that supports it.
I just refurbished the old Omega Solid State timer for a friend. Its the little box that forms the top of the "Power Tower" for the Chromega light source.
That is a fantastic little circuit. All resistors (high quality) and capacitors (Sprague 'orange drop') and a single SCR (that was blown). Very straight forward design. Big relay with easy to clean contacts. No complex integrated circuits or rare components.
If I ever see one of these in a box of junk I'm going to pick it up for myself. Should be easy to get working.
I think Ralph makes a very valid suggestion. If one is indeed "starting from scratch", then one should at least check the two F stop timers that are easily available, i.e., R.H. Designs, and Darkroom Automation. I have rarely seen these timers available on the used market though. Furthermore, the initial cost will certainly be somewhat higher than the other timers mentioned.
Lektra made the Zone VI enlarging timers. They are workhorses. Highly recommended.
The Lektra's are surely workhorses! They are indestructible.
Any insight on how the keep over the years re: repeatability? accuracy? I am beginning to suspect some drift with my LektraTM8 workhorse and would like to solicit insight before I take it apart, etc. I can get my hands on a Kearsarge to replace the Lektar. Good move? Bad move?