Then I think you need some advice from JH or Tim Hughes.
Chuck Norcutt
usher99@xxxxxxx wrote:
> Thanks Chuck. The T28 fired OK from a T-cord hooked up to the T32 on
> the 4T---whole rig on my Lepp II bracket. A Viv 283 failed to fire
> last Nov on the 4T as well. The T28 is the most frequent misbehaver on
> the 4T though always seems fine on my back-up OM2 or 2N.
> Perhaps I am jostling something in the 4T.
>
> Everything works fine tonight of course.
>
> A flummoxed Dr. Cranky Flash
>
>
>
>
>
>
>
> It doesn't sound to me as though the problem is external contacts on
> the hot shoe or the flash units... you've scrubbed them to death.
> Except for your T32 comment I would have said the problem is with the
> T28. My suspicion is that the apparent randomness is a problem with the
> wiring in the T28 and when you touch it or move it to another camera
> you're affecting the outcome by jostling a wire and creating an open
> circuit.
>
> I'd suggest you go back to the T32 or another flash and see if you
> really can create a failure with that flash on the 4T. Just for
> completeness you might also want to test manual flash firing via the PC
> connector on the 4T.
>
> Chuck Norcutt
>
>
> usher99 [at] aol.com wrote:
>
> This had been a longstanding issue/irritant. Sometimes a T32 even
> won't fire but seems to especially misbehave with my T28. This summer
> the T28 did not fire after much effort with my new Z. 38 macro. I even
> had an eraser in my pocket and used it prior. After disassembly of the
> whole rig and once again careful cleaning with Ethyl acetate and the
> eraser--seemed fine. Finally finished up another roll in the 4T and did
> a dry run sans film today of my latest butterfly rig in anticipation of
> an upcoming trip home----shutter seemed to lag. I estimated stayed open
> like OM-2 for 1/15 sec or so because of insufficient flash. Another
> cleaning and it seemed fine again. I had it CLA'd a few months ago and
> of course it was on its best behavior when John had it. When I put the
> T28 on an OM-2 when it didn't fire on the 4T, it was fine. This guy is
> going on flash probation. Otherwise it is fine and there is no visible
> issue with the hot shoe.
>
> Any comments appreciated.
>
> Mike
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