The AC adapters bypass the charging circuit so no transformer whine.
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
Olympus OM Service since 1977
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----- Original Message -----
From: "Walt Wayman" <hiwayman@xxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Thursday, February 17, 2005 9:37 AM
Subject: [OM] Re: F.AC 2 questions
> Simon,
>
> I never really thought about it; didn't care as long as the flash got
> charged. Out of curiosity, though, I just now tried one on a T45 and a
> T32. The T45 didn't make a sound at all, but the T32 whined with the
> adapter when there were batteries installed, but not at all when the
> batteries were removed. I would've tried the same experiment on a T20,
> but since it doesn't have a "test" button, it's too much of a PITA, so no
> data available. And one more bit of useless information: the T45 doesn't
> whine or whistle when charging from a Quantum Turbo battery pack either.
> I don't know how it sounds with one of its own NiCd packs since both mine
> are long dead and gone.
>
> I'm sure one of the electronic whizzes here will tell you everything you
> ever wanted to know, and more, about the whys and why nots of whistling
> and whining, but if the "ready" light comes on, unless there's a sizzling,
> crackling and popping sound, accompanied by smoke and smell, I wouldn't
> sweat the details. Ignorance is bliss, as I'm jolly good proof of.
>
> Walt, again using a preposition to end a sentence up with
>
> --
> "Anything more than 500 yards from
> the car just isn't photogenic." --
> Edward Weston
>
> -------------- Original message ----------------------
> From: "Simon Worby" <simon@xxxxxxxxxxxx>
>>
>> Flash AC Adapter 2
>>
>> 1. Why no whistling noise when capcitor being charged from adapter?
>>
>> 2. When with batteries and AC connector, there is a whistling. Does this
>> mean it's not using the AC adapter to charge the flash unit?
>>
>> Thanks,
>>
>> Simon
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>
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