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Re: [OM] Olympus T28 Twin Macro flash

Subject: Re: [OM] Olympus T28 Twin Macro flash
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Wed, 19 Aug 2009 22:31:58 -0400
No, the SP Power Pack is a high voltage device driven by a 12 volt lead 
acid Panasonic style camcorder battery.  It connects directly to the 
T32's external input connector.  The output is 305 volts DC at 500ma. 
It's a near clone of a Quantum Turbo Battery and uses Quantum's own 
cables to connect to various flash units.

I have cables for the T32, Canon 540EZ, Sunpak 422 and Sunpak 522.  I 
haven't injured a flash with it yet.  But I am careful not to fire too 
fast without letting the flash cool.

Chuck Norcutt


C.H.Ling wrote:
> You mean you SP pack is a 6V DC device? In this case the high output 
> voltage/current of your power pack can also speed up the charging but it is 
> danger to drive the T-32 at such high current. I remember the initial 
> charging current of T-32 with AA Ni-cd is over 5Amp.
> 
> If your SP pack is AC and directly connected to T-32's external input 
> connector then it will charge fast but you have to note the output voltage 
> must not exceed 230VAC.
> 
> C.H.Ling
> 
> ----- Original Message ----- 
> From: "Chuck Norcutt"
> 
>> 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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>>>>
>> -- 
>> _________________________________________________________________
>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
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>>
>>
> 
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