Film-Tech Forum ARCHIVE: Correct Auto-Strike Zener for Super Lum-Ex and Irem combination

This is topic Correct Auto-Strike Zener for Super Lum-Ex and Irem combination in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Mark Gulbrandsen (Member # 72) on 07-17-2009, 09:29 AM:

I know the factory zener for the auto strike board is the wrong one for use with the lower voltage Irem rectifiers but does anyone know which zener is correct? I was thinking the zener shold be either 47 volts or 52 volts at 5 watts. Have changed these out many times but its been a while and I've forgotten.

Thanks to anyone out there that might be able to refresh my brain!!!

Mark

Posted by Bob Peterson (Member # 826) on 07-17-2009, 11:21 AM:

I have used a 51 volt 2 watter on Irem N3-X75 rectifiers with no problem. Their no load is typically 90 vdc

Posted by Mark Gulbrandsen (Member # 72) on 07-17-2009, 02:25 PM:

Thanks Bob! Yesterday I did get two 52 volt 5 watt zeners so I would assume thats close enough.

Mark

Posted by Bob Peterson (Member # 826) on 07-17-2009, 05:30 PM:

BTW Graingers has a 110 VAC SPST relay that is compact and enclosed w/push on terminals. It works real well for an Irem application. I believe it is a 4A711.
Bob

Posted by Steve Guttag (Member # 268) on 07-17-2009, 08:01 PM:

Strong has traditionally offered Three different auto-ignite boards for the Super Lume-X. They have since condensed it down to two...I know one uses the 51V zener.

Steve

Posted by Louis Bornwasser (Member # 3063) on 07-18-2009, 04:57 AM:

51v sounds right to me. (I would have made only one board with selectable zeners if I had made it, so there would only have been one stock number. . . . zeners are cheap. Louis

Posted by Mark Gulbrandsen (Member # 72) on 07-19-2009, 09:52 AM:

I agree Louis but thats just too logical of a thing to do for you know who!!!

Posted by Marin Zorica (Member # 1716) on 07-19-2009, 01:10 PM:

Czech Meopta has jumper so you can selct no-load voltage of rectifier [Wink]