Film-Tech Forum ARCHIVE: Victoria 5 reverse-scan preamp

This is topic Victoria 5 reverse-scan preamp in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Fabian Schreyer (Member # 5120) on 03-28-2012, 07:06 PM:

I am rebuilding a 1997-made Cinemeccanica Victoria 5 these days.

While I was able to fix most problems that occured, I'm stuck at wiring the reverse scan soundhead.

The main problem is that I just don't know the supply voltage for the preamp. It seems to require a symmetrical power supply, but I was absolutely unable to find any information on this topic on the internet.

I was able to figure out that modern processors like a CP650 do have an integrated power supply for such purposes. As I am planning to use a CP65 or CP55 I guess I probably need some external power supply, or am I wrong?

Thanks in advance for any help on this [Smile]

Posted by Sam D. Chavez (Member # 1841) on 03-28-2012, 10:19 PM:

You are correct you can use the +/- 12 Volts from the 650. Do you have the power supply for the LED?

You do need to find a source for +/-12 Volts.

Posted by Fabian Schreyer (Member # 5120) on 04-01-2012, 05:32 PM:

Thanks for your help. [Smile]

At the moment I'm using the +24/-18 volts from the CP55s test connector together with 7812/7912 voltage regulators to get a -12/+12v power supply.

The power supply for the LED was built into the projectors basement, so the setup is completed for the moment.