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Re: [OM] Flash/Batteries questions

Subject: Re: [OM] Flash/Batteries questions
From: "C.H.Ling" <chling@xxxxxxxxxxxxx>
Date: Thu, 20 Jun 2002 12:20:22 +0800
"John A. Lind" wrote:


> I've been using 1600mAH NiMH cells in two T-32's without any problems.  The
> clue to C.H.Ling's "fried" T-32 was in his last sentence:  "54 consecutive
> charge and discharge cycle (no wait time in between)."  Nearly all shoe
> mounted and most handle mounted flash heads have a duty cycle.  They cannot
> be continuously fired like this without eventually overheating and the
> circuitry gives up the ghost.
> 

Yes, I also have no problem in normal use with Ni-cd or Ni-MH, but
just a case for warning if you want to know how many full power
flashes a set of battery can give you :-) No one tell me before a
flash is not designed to handle continue charge/discharge, but the T32
I tested was not bad, it can last for over 50 cycles! With a slight
modification on the transformer design I think it can withstand the
test condition I carried out. Using vacuum varnish or high quality
double insulation wire could solve this problem.  

> All this stuff runs on pressurized smoke.  As it heats up, the pressure
> from it increases.   If the pressure from gets too high, it springs a
> leak.  If enough smoke leaks out, it stops working.
> 

I have no idea on the "perssurized smoke" you are talking about, may
be you are talking about E-caps?

C.H.Ling

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