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Re: [OM] Olympus Power Bounce Grip 2

Subject: Re: [OM] Olympus Power Bounce Grip 2
From: "C.H.Ling" <ch_photo@xxxxxxxxxxxxx>
Date: Wed, 19 Aug 2009 10:17:02 +0800
The resistance of the circuit is much higher than the cells in case of 
re-chargables, if you add more cells the current will certainly be higher. I 
wouldn't push the T32 in such condition, it has the danger to damage the 
circuit. It was designed to use 4 batteries not necessary a constant 6V. I 
damaged a T32 switching transformer by using the old 600mA (?) Ni-cd, I was 
trying to see how many times of flash the batteries can provide at full dump 
but I didn't give the flash a rest after each dump :-(  Eventually the flash 
damaged after 54 discharge-charge cycles.

C.H.Ling

----- Original Message ----- 
From: "Chuck Norcutt"

> I've thought of using 5 batteries to keep the voltage up.  But that's
> only 6 volts and the voltage is was designed for.  Since the batteries
> are in series I don't think you'd get any more current flow than what
> you could push through one.  It would raise the output a bit.  As I
> noted earlier it makes a 1/2 stop difference in T32 output.
>
> Chuck Norcutt
>
>
> jgettis81@xxxxxxxxxxxxx wrote:
>> I think that in the case of a flash the lower internal resistance makes 
>> up
>> for the lower voltage.  I am sure that someone else on the list knows 
>> more
>> as I am just remembering something I read once.  I have looked at D sized
>> Nimh batterys in the store and see that they are the same mah or lower 
>> then
>> the AA ones.  I found some higher ones once on Radioshack.com but they 
>> were
>> at the time $10 a piece.  I have looked for a holder that holds 5 AA
>> batterys though thought that might boost the recycle time of a vivitar
>> flash a little or more likely burn it up. John
>>
>>
>>
>>> Would the fact that Alkaline cells are 1.5 volt and NiMH cells are 1.2
>> volt
>>> make a difference?  Just a thought.
>>> Paul in Portland OR

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