However it does it the SP pack is pretty fast. About 1-1/2 seconds to
recharge a T32 after a full dump. That's about the same time as my
homemade inverter takes to recharge a single Alien Bee 800 after a full
dump. And it can do all four in 6 seconds.
Chuck Norcutt
C.H.Ling wrote:
> I have checked the T-32 schematic, the input pins were directly connected to
> the 330V high voltage capactior through two diodes and two 27 ohm resistors.
> For sure the output from the PBG2 is high voltage AC.
>
> One of the reason for Piers not able to measure it could be due to a pin is
> connected to the T-32 power switch, if you don't turn on the T-32 (obviously
> since you cannot connect a T-32 during measurement) there is no output from
> the PBG2.
>
> Chuck, the SP Power Pack you mention could have a lower internal resistance
> so it charge faster. The PBG2's inverting circuit just like the one built-in
> T-32 or a bit powerful so it charge a little faster but not as fast as your
> SP pack. Due to the loading of the charging cap, the output of the inverting
> circuit is not able to maintain 300V* until the cap is fully charged up.
>
> * I have no idea what is the exact AC output voltage from the inverting
> circuit. Most likely around 210VAC RMS since the charging cap only rated at
> 330V DC.
>
> C.H.Ling
>
>
> ----- Original Message -----
> From: "Chuck Norcutt"
>
>> That makes more sense. If the output was 300v it would likely charge a
>> T32 in about 1-1/2 seconds as does my SP Systems Power Pack.
>>
>> Chuck Norcutt
>>
>>
>> Piers Hemy wrote:
>>> Actually that's wrong, I just measured the output from PBG2 - it's not
>>> 300v,
>>> it just under 6v (but the batteries are getting on a bit). But there is
>>> no
>>> available output socket when a falsh unit is connected.
>>>
>>> Piers
>>>
>>> -----Original Message-----
>>> From: Piers Hemy [mailto:piers@xxxxxxxx]
>>> Sent: 19 August 2009 16:09
>>> To: 'Olympus Camera Discussion'
>>> Subject: Re: [OM] Olympus T28 Twin Macro flash
>>>
>>> --snip
>>>
>>> And you can also discount using the PBG2, for (as noted by John Hermanson
>>> in
>>> the past day or so) it outputs 300volts direct to the capacitor of the
>>> attached T32 (or TPC).
>>>
>>> --snip
>>>
>> --
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>>
>
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