Film-Tech Forum ARCHIVE: Open diode question

my profile | my password | search | faq & rules | forum home

»	Film-Tech Forum ARCHIVE » Operations » Film Handlers' Forum » Open diode question

Author

Topic: Open diode question

Richard May
Phenomenal Film Handler

Posts: 1057
From: Floral Park, NY USA
Registered: Aug 2004

posted 06-24-2011 12:55 PM

I've had this happen only a few times before. I have an open diode but the lamp lights. Amperage drops to about 25 amps and the volts go over 100. Why is that?

| IP: Logged

Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 06-24-2011 03:24 PM

Ohm's Law.

As current goes down, voltage must increase. It always follows the proportion E=I*R where "E" is voltage, "I" is current measured in amps and "R" is resistance measured in ohms.

When a diode dies, you lose one leg of your transformer. It can no longer provide the current that it should. The voltage will increase in response.

| IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.