John H (omtech@xxxxxxxxx) writes:
<< External power source bypasses the grip electronics and dumps 200v directly
into the flash capacitor (I think).
>>
More or less, the flash capacitor actually charges to 330V. Even the line
cord operated external supply is actually ~330V *peak* (200V RMS, rectified
sinewave , to be pedantic). The flash capacitor charges to the rectified
peaks at around 320-330V. It also has a resistor and diode in the flash to
limit charge rate when a quantum type turbo supply is used and to further
isolate the connector pins which would others pose a major shock hazard to
the user.
The line operated supply is rated according to convention at the AC level
even though it is rectified DC on it's output. This is probably so the power
rating makes sense to regulatory agencies, like UL,TUV etc
The external and internal supplies are combined via a diode network in the
BG2 to isolate the internal electronics.
Regards,
Tim Hughes
>>Hi100@xxxxxxx<<
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