Re: anything new in the vr-5000 clock battery backup by now.....sept 2010

Hi Milt,

From what I know now, my battery has never workied while the radio has been in my hands - about 18months.

Cheers - Marty ZL2MC

--- In [email protected], "Milton Garb" <w6qe@...> wrote:
>
> Can you tell me how long the original batteries lasted?
> I have a new VR-5000 and would like some idea of the backup battery life.
> Thanks,
> Milt.
> W6QE
> 
> 
>   ----- Original Message ----- 
>   From: majoco21 
>   To: [email protected] 
>   Sent: Sunday, September 19, 2010 4:45 PM
>   Subject: [YaesuVR-5000] Re: anything new in the vr-5000 clock battery backup by now.....sept 2010
> 
> 
>     
> 
>   .....so I carefully cut through the sealant and removed the battery pack. I soldered new wires onto the two pads where the battery had been connected - long enough to attach another battery and put it in the IF board area. Then I reassembled the radio after a bit of hassle with those flexible flat wiring harnesses. On turning on, I was pleased to find that I had normal operation with memories intact.
> 
>   So all those who said that the battery pack was to keep memories alive - remember - one test is worth a thousand opinions! The EEPROM that stores all the info is attached to the other big microprocessor on the front panel.
> 
>   At the moment the battery pack is being slowly discharged. I will then recharge it similarly slowly and see if it can be 'rejuvinated'. If not, I'll research cordless phone battery packs - they seem to be about NZ$10 each and I'll need two. Two supercaps would be cheaper.
>   --- In [email protected], "majoco21" <martin_cook@> wrote:
>   >
>   > I was intrigued that Leo's receiver saved the clock, so I took my VR5K apart. The backup battery is a green heat shrinked pack behind the front panel - glued in place with silicon sealant and double sided tape. The black lead goes to chassis (according to the circuit) but the red one disappears under the battery. I used an old tricj with a dressmakers pin and pierced the red lead insulation to read the battery voltage. The radio had been turned off for no more than 15minutes - the battery voltage was.......3.2volts! No wonder I lose the clock!
>   > 
>   > I see that 'supercaps' only go up to 5.5volts, so they're out.
>   > 
>   > More investigation later.......
>   > 
>   > --- In [email protected], "leo_j_metcalfe" <leo_j_metcalfe@> wrote:
>   > >
>   > > Hi i have just bought a VR5000 from ebay and the clock battery must be fitted as this one unlike others i'v have does holed the clock settings when unpluged so it can be done
>   > > 
>   > > cheers Leo
>   > > 
>   > > Notheast UK
>   > > 
>   > > --- In [email protected], "elkmoose55" <elkmoose55@> wrote:
>   > > >
>   > > > Yes that battery is for the memory backup,best to replace that when you see fit,but it is a rechargeable battery and is supposed to charge up when the unit is on,but I am tryin to figure out what section runs the clock where another little battery could be hooked up to keep that alive,its always best to get that software that keeps ur memory contents,but in my case since I dont have it yet,waitin for some free copy to float around!! but I just keep whats in there on hard copy...paper if it ever gets messed up on me.
>   > > > 
>   > > > --- In [email protected], "majoco21" <martin_cook@> wrote:
>   > > > >
>   > > > > 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. 
>   > > > > 
>   > > > > --- In [email protected], "elkmoose55" <elkmoose55@> wrote:
>   > > > > >
>   > > > > > Well after 10 yrs has there been any testing done to figure out a way to put a battery in there to keep the contents of the clock,if no one has done it,i need the schematic for it and then I will get into it..thanks elk tech
>   > > > > >
>   > > > >
>   > > >
>   > >
>   >
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