"Brian P. Huber" wrote:
>
> John,
> Try removing the batteries. I don't think you need them with the SB-4.
> I was also thinking that the 285HV used the SB-6.
>
> Brian Huber
Brian, The 285HV, or at least my 285HV, will not function without the
batteries in place. The 285HV's instruction book has an explicit
requirement that "........four fresh AA alkalines ............ must be
in the flash unit to operate the synchronization circuit." There is no
mention that the use the SB-4 will cause the batteries to drain.
John Hudson
> > I have a question for anyone who is electronically inclined!
> > I am powering my Vivitar 285HV flash gun with the dedicated
> > SB-4 110v/120v AC to DC power pack. The gun requires four new
> > AA batteries to operate the synchronization circuit. Although
> > the gun's recycle time is faster than had I been relying on
> > battery power alone I have noticed that the batteries are
> > also draining.
> >
> > I am wondering whether the battery drainage is attributable
> > to them operating the synchronization circuit only or whether
> > the gun requires the batteries to provide part of the charge
> > the other part of which is provided by the power pack.
>
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