As you say, the Quantum Turbo does go directly to flash cap, the regular turbo
does not of course. So if you use a regular turbo battery on T32, because it is
6.6V when charged vs 4.8V for NiCd, the T32 draws a lot more current and it
even draws quite a lot more while idling once cap fully charged. A Qunatum
regular turbo is actually very tough on T32 in multiple rapid full dumps. It is
surprising more T32's do not croak on the regular turbos.
To address the issue of too rapid charging of the T32 cap, and so aging the cap
when run from an external turbo pack, the T32 does include a small resistor in
series with the cap, which has a rather modest slow down effect on charging the
cap. Infact it is such a physically small device that with a really fast turbo
type external device, and multiple fast dumps, it could easily overheat too!
In a good design, if the battery internal resistance is fairly low, the battery
should not have a huge effect on the inverter performance, but the t32 is a
pretty old design. The battery voltage has an effect, in that the primary
inductance of the invertor transformer is rate limiting as current ramps up at
any voltage, but the current ramps faster with a higher battery voltage.
tim hughes
--- On Wed, 1/6/10, C.H.Ling <ch_photo@xxxxxxxxxxxxx> wrote:
> From: C.H.Ling <ch_photo@xxxxxxxxxxxxx>
> Subject: Re: [OM] Strobist: New NiZn Batteries Offer Lightning Fast Recycle
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Date: Wednesday, January 6, 2010, 6:42 PM
> As far as I remember your Quantum put
> high voltage directly to the capacitor
> of the flash, it does not go through the step up circuit of
> the flash so
> there is much less risk of damage the flash by quick full
> power cycles.
> (still a small risk for the cap, it could aging faster).
>
> I damaged the step up transformer of a T32 by 54 continues
> full power dump
> just with the old 600mA Ni-cd.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Chuck Norcutt"
>
> > Full dump recycle time on a T-45 is 2.2 seconds.
> The Nikon SB-900 was
> > recycling in 2 seconds (watch the timer on the video)
> so it was running
> > faster not "almost as fast". However, it's quite
> true that it's not
> > designed to do that in a sustained fashion as the T-45
> apparently is.
> > My Quantum Turbo pack clone will recycle any flash I
> have in about 1-1/2
> > seconds but I would never attempt to fire it 13 times
> in rapid
> > succession and have never needed to. I would say
> the max is maybe 6-8
> > shots in rapid succession at 1/2 or 1/4 power during
> the Hora at a
> > Bar/Bat Mitzvah. It's not acceptable to miss the
> kid while he/she is
> > looking at you while up in the chair and being
> spun around. But that
> > much is not a stress on the flash.
> >
> > Chuck Norcutt
> >
> >
> > Ken Norton wrote:
> >> Be very afraid.
> >>
> >> That Nikon flash recycled ALMOST as fast as the
> T45, but did so in
> >> serious
> >> cook mode. I counted 13 flashes and it went into
> thermal protection mode.
> >> I'm not sure how many I can do with the T45 as I
> exceeded 50 before fear
> >> kicked in but the warning light didn't come on.
> >>
>
> --
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|