I searched the Vision Age issues again and could not find another reference
to the F280.
There are a references to the F280 flash in the Olympus Pursuit issues.
Volume 5. No. 4. 1986 has a small story on the development of the F280 and
it specifically mentions the Olympus engineers "examining the
characteristics of the xenon flash tube, including optimal gas pressure,
flash duration and emission cycle." I hope this helps.
I could scan the article if anyone wants it. It is only one page and does
not give much technical detail.
Michael.
----- Original Message -----
From: "Tim Hughes" <timhughes@xxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Wednesday, March 10, 2004 8:52 AM
Subject: [OM] F280 in Vision Age/copy
> 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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