[time-nuts] 5370 processor boards available

[paul swed]

Totally agree with Chucks comment I have opened many system that have been
in service at least 5 years virtually no evidence of corrosion.
I have however opened system that do not manage the batteries correctly and
they are a mess.
But we really are drifting away from the main thread. Just want to turn the
5370 off at the end of the day and back on the next. No think-um.
Regards
Paul


On Thu, Feb 27, 2014 at 4:26 PM, Chuck Harris <cfharris at erols.com> wrote:

> I have worked on lots of equipment that was sealed with
> a SLA inside, and I have never seen any sign of corrosion.
> Only times I have seen a problem is in the case of UPS's that
> were left discharged in unheated warehouses... the electrolyte
> froze and the battery cases bulged greatly, but still no leakage.
>
> -Chuck Harris
>
>
> Dr. David Kirkby wrote:
>
>> On 27 February 2014 17:31, Chuck Harris <cfharris at erols.com> wrote:
>>
>>> Backup batteries don't make me queasy.  The easiest,
>>> cheapest backup battery would be a small 6V 3AH sealed
>>> lead acid battery.  It is trivial to make a good float
>>> charger using a 3 terminal regulator and a diode, and
>>> they do not leak, vent, or anything problematic.  The
>>> little 6V 3AH packs are used in emergency lighting, so
>>> they are readily available.  Float them at 6.9V, and
>>> they will last at least 5 years.
>>>
>>
>> I thought there was an issue with even "sealed" lead acids of them
>> emitting small amounts of sulfuric acid, which is not great in a bit
>> of test equipment.
>>
>>
>>
>> Dave
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