Focomat 1 magnification scale
Old 07-25-2016   #1
megido
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Focomat 1 magnification scale

Hi all
The illuminated magnification scale on my Focomat 1c has developed a fault.
Prior to the fault, the scale was constantly illuminated. Now it only illuminates when the bulb is turned on.
Is there some kind of relay within the wiring?
Thanks
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Old 10-14-2016   #2
M.Hilo
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Are you sure your scale indicator was always lighting up?

Both my 1c and 2c have these indicators, and they switch on only when I turn on the enlarger bulb. Either while setting up or during exposures.

To be honest, I have always found it strange they light up during exposing. It makes more sense to have no light at all at that moment. My safe light also turns off while exposing . . .

Having said this, in 35 years of printing I never once used the scale indicator. I could of course take out the bulbs of the scale indicators, let's say I have had a weak spot for these useless-to-me X-mas tree devices . . .
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Old 10-14-2016   #3
megido
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Yes, I'm positive the scale was permanently illuminated. So, it looks like it has corrected itself to how it was designed to work. Ie: only illuminates when the enlarger bulb is on. I think I will remove the whole assembly anyway, seems totally superfluous.
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Old 10-14-2016   #4
M.Hilo
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Which 1c do you have? Black or grey? Some early versions may have worked like you had it before.

Just remove the small bulb from the indicator, if you do not want the light.

I realised I like having that light when making the exposure, because all other lights turn off when I start the exposure. It gives me orientation in the dark.
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Old 10-14-2016   #5
megido
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I have a late grey version with white base.
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Old 10-15-2016   #6
M.Hilo
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Quote:
Originally Posted by megido View Post
I have a late grey version with white base.
So do I.

I think the way it works now is how it is supposed to be. I was wrong before to say it would be more logic if it turns off while exposing. Probably this indicator scale was built to quickly bring your enlarger up or down to the decided indication number. To do that correctly, to fine tune, the bulb must be turned on during the entire operation.

Remember, this enlarger was used in many newspaper darkrooms, where speed was important. Perhaps that is what this device was all about.

Sometimes the indicator comes with the wrong bulbs, too bright! They need special bulbs, weird looking things which I believe are called signal bulbs . . . these take a moment to reach the full brightness, the light is soft and yellowish
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