8mm Forum: 30 year old Projection Bulb

»	8mm Forum » 8mm Forum » 30 year old Projection Bulb

UBBFriend: Email this page to someone!

Author

Topic: 30 year old Projection Bulb

Thomas Dafnides
Expert Film Handler

Posts: 247
From: St. Louis, Missouri USA
Registered: Dec 2009

posted July 26, 2010 09:41 PM

When you buy a 30 year old unused projection bulb with an intact filament that will not light (contact cleaned)...what has happened....vacuum seal gone?

| IP: Logged

Alexander Lechner
Expert Film Handler

Posts: 118
From: Leoben, Austria
Registered: Apr 2009

posted July 27, 2010 01:06 AM

Happened to me as well. The only explanation would be that the wire inside the cement (between connection pins and filament) is not intact anymore.

--------------------
Alex

| IP: Logged

Simon McConway
Phenomenal Film Handler

Posts: 1085
From: Doncaster, UK
Registered: Jun 2004

posted July 27, 2010 03:29 AM

What lamp is it (type)?

| IP: Logged

Adrian Winchester
Film God

Posts: 2941
From: Croydon, London, UK
Registered: Aug 2004

posted July 27, 2010 11:44 AM

Unlikely to be the explanation, but if the pins are extremely tarnished, you could try cleaning them with a sharp knife or emery paper, etc.

--------------------
Adrian Winchester

| IP: Logged

Pasquale DAlessio
Film God

Posts: 3523
From: Bristol,RI, USA
Registered: May 2010

posted July 27, 2010 01:29 PM

If the vaccum seal was gone the bulb would have flashed when turned on and you would see a burnt filament.

| IP: Logged

Tony Stucchio
Jedi Master Film Handler

Posts: 625
From: New Jersey
Registered: Dec 2005

posted July 27, 2010 07:51 PM

I have the same issue -- an Elmo EFR that came with a projector I got last year. It is not burnt out -- I just can't throw it away even though it won't light up. I've cleaned the pins with some alcohol to remove the blackness but no luck.

| IP: Logged

Thomas Dafnides
Expert Film Handler

Posts: 247
From: St. Louis, Missouri USA
Registered: Dec 2009

posted July 27, 2010 08:01 PM

The bulb is an incandescent CXL...it would not light up in one projector which had a working bulb....but when I tried it another projector it did light. (Just made a note on its box).
The one projector has a cleaner contact (it looks less tarnished) ?

| IP: Logged

All times are Central

Printer-friendly view of this topic

UBB.classic^TM 6.3.1.2