Pot-Belly Bulbs

[P3D John Arrowsmith <jarrow@xxxxxxx>]

> Hi, Kevin!
> 
> I have a Compco Stereo 500 that hasn't had any trouble with blowing
> lamps. The "pot-belly" phenomenon is usually a sign of overheating.  Is
> the blower working, and, if so, are all the ventilation holes clear?  
> Hi, Kevin!

 I have owned my Compco 500 for 18 months and have not had an
overheating
 problem. The Compco fan on my projector is a little stiff to move and
takes
 a few minutes to reach its full speed as the bearing warms up. The
manual
 advises that the bearing be oiled frequently. It maybe a good idea to
 fully inspect the fan motor to determine whether it may be gummed up. 

> I've never heard of "WIKO" lamps; I got a couple of CZA lamp
> replacements a while back from an estate sale, but they are GE's, which
> are a standard brand that behaves reliably.  Try to find Sylvania, GE,
> or Westinghouse lamps if your ventilation blower system seems OK.

I normally use bulbs purchased from Reel 3-d. The only time I have
problems
with the CZA bulbs was when I tried to power the projector using a triac 
voltage converter device ( 240V to 110V ), Australia being a 240 Volt 
country. The converter and the projector were not a good combination.
When
I turned one lamp on as a test, there was a very bright flash of light
and
the CZA was no more. It did exhibit the pot belly look when I removed it
from the projector.

        Does anyone know if halogen replacement bulbs are available for
the Compco 500? Dalia has them for TDC projectors, there maybe be
replacements
for CZA. If so, I would very much like to purchase.


        John Arrowsmith
        Sydney, Australia


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