Zone VI Cold Light Head 8x10

[arupp]

Recently I purchased a Zone VI cold light head (8x10). Basically it works fine, however, every now and then only the green tube is working when the head is switched on. When I switch off the whole head and wait for a couple of minutes it works correctly for the whole session.

I wonder if there is anyone out there who is aware of such a problem and if you know about schematic diagrams to get this head fixed if the problem gets worse.

Thanks a lot

Andre

 

[Robert Hall]

You might call Calumet tech support in Chicago. They are usually pretty good about answering questions.

 

[hacked - sepiareverb]

You might call Calumet tech support in Chicago. They are usually pretty good about answering questions.

Hah! They have zero clue about anything analog in my experience. Call Richard Ritter.

 

[arupp]

Thanks for the advice, Robert. Indeed, Calumet in Chicago still have some spare parts on stock. Right now, the cold light works fine. Its probably a matter of temperature. So I won't disassemble the head right now...
Is there anybody out there also using this head and if so have you ever noticed such a behavior?

Regards

Andre

 

[Robert Hall]

I have had my Zone VI for about 6 or 7 years. It has worked well for me.

 

[hacked - sepiareverb]

My enlarger has been great, but I've had less than good luck getting even info from Calumet about parts. Hopefully this means they've returned to their former selves in service!