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[OM] F280 in Vision Age/copy

Subject: [OM] F280 in Vision Age/copy
From: Tim Hughes <timhughes@xxxxxxxx>
Date: Tue, 9 Mar 2004 13:52:55 -0800 (PST)
Clint,
         There was an article somewhere (I thought Vision Age, but it does not 
say that in #6) saying that they had spent a lot of time developing a number of 
specialised components for the F280, including the flash tube.  It runs at an 
unusually low voltage in the F280, which would normally make it tough to 
trigger reliably, unless it had a modified fill pressure or gas content.  
Krypton triggers at a lower voltage than Xenon but efficiency is typically 
lower, so is not normally used for photoflash.  Krypton is often used for 
continuous discharge illumination sources (Fibre Endoscopes etc). It is hard to 
run normal photo-flash tubes at high flash rates like the F280, even with more 
complex simmer circuits etc. so it would be interesting to know it was done in 
F280.
 
Are you absolutely sure it is the same tube as T32?  Do you have the F280 p/n 
to compare with the T32 listed p/n. Have you ever replaced a F280 tube with the 
T32 part, and had it work?
The T32 service manual drawing shows tube p/n as EC4015,  vendor part # 
S-3655-G. Is this the same as the F280 part list? (the tube # is not shown on 
Mark's website copy of service manual). The QA310 shows a different tube p/n 
EP3174. The T45 also shows a different p/n D0007700. I would guess the 
T32/45/310 would all work interchangeably with no problem, if they fit.
 
Regards,
Tim Hughes
 


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