8mm Forum: Sankyo 800 lamps blowing

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Topic: Sankyo 800 lamps blowing

Michael Wright
Expert Film Handler

Posts: 184
From: Chorley, Lancashire, England
Registered: Dec 2008

posted July 15, 2018 11:34 AM

Turned on my trusty Sankyo today and the bulb went in seconds. Put a new lamp in and the same thing happened? Any ideas?

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted July 15, 2018 11:59 AM

Hi Mike,

The quickest way to blow a lamp is supply it with voltage too high. Double the voltage, quadruple the power. Take this far enough and you've re-invented the flash bulb! So your first step is to make sure you haven't accidentally re-configured for 115 VAC (I can get away with that here, but...)

Bonus if you can measure the voltage at the socket.

The question is then: "What blew?" Are there roasted filaments rattling around in the glass envelopes? Are the pins burned off?

Bonus if you can measure the resistance of the lamp (out of circuit)

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All I ask is a wide screen and a projector to light her by...

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