Re: anything new in the vr-5000 clock battery backup by no...

yup thanks for the input,i guess I will just setup a little 12 volt nicad back up and see how that performs when the main power is disconnected,one could do a amp check and see what its drawing when merely turned off.clock workin or not workin is not that important I guess but one would think that if the memories can be stored and kept..then a simple clock memory could be added..oh well thats yaesu for ya..thanks

--- In [email protected], Larry Horlick <llhorlick@...> wrote:
>
> As I recall, the analysis of the clock circuit showed that it is quite power
> hungry, so the only real solution would be a re-design, a task not for the
> faint of heart.
> 
> lh
> 
> On Tue, Sep 7, 2010 at 6:07 PM, elkmoose55 <elkmoose55@...> wrote:
> 
> >
> >
> > Maybe one could disconnect that battery and see if the contents get lost,of
> > course if you have a backup from that computer program or if you dont have
> > that much in there,let us know!I'll see what I can do to make a test also,so
> > if this is just a buffer,then we should be able to find out what part of
> > that control ic can be set up with a backup battery,i am studyin the
> > schematic as best as I can
> >
> >
> > --- In [email protected] <YaesuVR-5000%40yahoogroups.com>,
> > poldhu1901@ wrote:
> > >
> > >
> > > In a message dated 05/09/2010 23:52:36 GMT Daylight Time,
> > > martin_cook@ writes:
> > >
> > > Hi there - I see on the schematic for the control unit there is a 7.2volt
> >
> > > nicad at the lower left side drawn in in dotted lines as though it's an
> > > option. I have replaced similar backup batteries with 'supercaps' in the
> > past
> > > and they work quite well, keeping the memories alive in my NRD515
> > receiver
> > > for more than a fortnight.
> > >
> > >
> > > ----------------
> > > Hi Martin
> > >
> > > I think the problem referred to is that of the VR-5000 losing its clock
> > > data if disconnected from the mains, the memorised frequencies seem to be
> >
> > > stored in non-volatile devices so shouldn't be an issue.
> > >
> > > I wasn't previously aware of the 7.2v Ni-Cad but online comments suggest
> > > it's fitted to act as a supply buffer, to deal with problems of the CPU
> > > resetting itself with supply glitches, rather than for data retention.
> > >
> > > regards
> > >
> > > Nigel
> > > GM8PZR
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>