Omega Chromega B Dichroic power supply

livelovelaugh247 · Mar 22, 2007

Does anyone know where I can get an Omega Chromega B Dichroic power supply for my color enlarger? Also, is there a way to make one from scratch and if so, does anyone know how? It's apparently an 27 volt 75 wattes AC power supply.

Thanks

Nick Zentena · Mar 23, 2007

http://www.khbphotografix.com/

I doubt it's worth while. Likely cheaper to buy a whole used enlarger.

David Brown · Mar 23, 2007

They come up on ebay once in a while. Thing is, those enlargers tend to sell cheap, you might get the whole thing for not much. Then you'd have all kinds of spare parts.

rexp · Mar 23, 2007

In my basement is a power supply which I picked up in the thrift shop. It is for an Omega enlarger, but I don't know which one. I can look it over this weekend & send you any numbers on it if you would be interested.

You can have it for the cost of postage, or I'll pay the postage if you send me a print...

rexp · Mar 24, 2007

Oops - I forgot. That power supply ain't around anymore, someone else got it (not to run an enlarger, but at least it found a use).

sorry - rexp

Mike Wilde · Mar 27, 2007

24 v tx options

27 V is not too far off of 24 V. 24V ac is a very common industrial control voltage for pulling in relay coils, etc. Look in an electronics/surplus shop that sells 24V international multitap control tranformer. They have the primary wound for 110,117,125, 220, 240, and 277 volts typically. If you live in a 117/120V area, then hook it up using the 110V terminal. The secondary voltage should be very close to 27V. The change from the 27V supply to a few volts low will likely mean that all of your past filter settings will be off, but if the bulb burns a few volts below its rating it should last longer as a trade off.

livelovelaugh247 · Mar 28, 2007

Thanks everyone for all the help. Your replies have been very useful.

CRhymer · Mar 28, 2007

Mike Wilde said:
27 V is not too far off of 24 V. 24V ac is a very common industrial control voltage for pulling in relay coils, etc. Look in an electronics/surplus shop that sells 24V international multitap control tranformer. They have the primary wound for 110,117,125, 220, 240, and 277 volts typically. If you live in a 117/120V area, then hook it up using the 110V terminal. The secondary voltage should be very close to 27V. The change from the 27V supply to a few volts low will likely mean that all of your past filter settings will be off, but if the bulb burns a few volts below its rating it should last longer as a trade off.

True enough. Halogen bulbs (which I believe is what you are running) need to run hot and will tend to darken (get black deposits inside) if run at too low a voltage. A little low will probably not make a difference.

Cheers,
Clarence

David Brown · Apr 6, 2007

livelovelaugh247 said:
Does anyone know where I can get an Omega Chromega B Dichroic power supply for my color enlarger? Also, is there a way to make one from scratch and if so, does anyone know how? It's apparently an 27 volt 75 wattes AC power supply.

Thanks

http://cgi.ebay.com/Omega-Chromega-...6QQihZ019QQcategoryZ29985QQrdZ1QQcmdZViewItem

filmnut · Apr 6, 2007

If you're still looking let me know, I may have one somewhere, but I'm not sure if it is the exact one you are looking for. So if you are still looking for one, let me know and I'll dig it out and see if its' the right one.
Keith aka Filmnut

inthebeast · Mar 5, 2008

Chromega B 27V supply

I have one. If you still want one, say so and I'll blow the dust off and check it out with a DMM to make sure it works. I don't want it, as I don't have the device it powers.

john cowie · Mar 6, 2008

Hi, if you haven't found one yet, I have one I don't use.

Omega Chromega B Dichroic power supply

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