[time-nuts] HP-105B Battery Replacement?

Martin A Flynn maflynn at theflynn.org
Thu Sep 15 18:50:26 EDT 2016


Look for a  POWERVAR model ABCE150-11M2.  It has an IEC plug and 
connector for 120 Volt in and out along with a yellow SB-50 connector 
for the 12 VDC battery connector.  Compatible with LiFePO4   and SLA 
battery chemistries


On 9/15/2016 6:21 PM, Mark Spencer wrote:
> They do exist.   I've seen them in service at Telecom sites outside of the U.S. and Canada.   I believe there was a thread re this a few years ago ?
>
> Sent from my iPhone
>
>> On Sep 15, 2016, at 3:13 PM, Jeremy Nichols <jn6wfo at gmail.com> wrote:
>>
>> Since I have a 12V 100 A-H gelled electrolyte battery as a
>> short-term backup (for those outages not worth firing up the generator),
>> I'd like to find a UPS that uses an external battery. So far I don't see
>> such a thing--do they exist?
>>
>> Jeremy
>>
>>> On Thursday, September 15, 2016, Bob Camp <kb8tq at n1k.org> wrote:
>>>
>>> Hi
>>>
>>> It’s been quite a while since I bought anything other than a pure sine
>>> UPS. They really aren’t as expensive
>>> as they once were. You may find them a bit cheaper from outfits like
>>> CyberPower than from APC. Sometimes
>>> it s a bit tough to work out exactly what is or is not a pure sine wave
>>> unit. If you want a full “always on” pure
>>> sine device, they are still a bit expensive.
>>>
>>> Bob
>>>
>>>>> On Sep 15, 2016, at 2:13 PM, Jeremy Nichols <jn6wfo at gmail.com
>>>> <javascript:;>> wrote:
>>>>
>>>> Your point is well made. My question is: what happens to the quality of
>>> the output sine wave if I use anything other than a true sine-wave (i.e.,
>>> expensive) UPS? Most of them these days produce a semi-sine wave (aka
>>> modified square wave) that may or may not play well with the 105B. Anyone
>>> have experience?
>>>> A external battery and appropriate chargers and cabling does sound like
>>> another good alternative. Harder to move around but I don't (yet) have such
>>> a need, only that the 105B stay "on" regardless of power failures.
>>>> Jeremy
>>>>
>>>>
>>>>> On 9/15/2016 10:15 AM, Bob Camp wrote:
>>>>> Hi
>>>>>
>>>>> A bigger question becomes:
>>>>>
>>>>> Do batteries inside equipment make much sense anymore?
>>>>>
>>>>> These days, a UPS is often a standard part of a rack in an outage prone
>>> area. Powering
>>>>> the “whatever” instrument off of the same UPS as the rest of the stuff
>>> is one obvious
>>>>> answer.
>>>>>
>>>>> The other answer is an even older approach. Use a battery bank that is
>>> external to all
>>>>> the gear in the rack and tend it independently of each box in the rack.
>>> That way you have
>>>>> a few very large cells to worry about rather than a whole bunch
>>> scattered about. Things like
>>>>> lead acid that are impractical in a piece of gear are more of an option
>>> in an independent
>>>>> battery box. A single charger / line supply makes it easier to invest
>>> in something with real
>>>>> smarts in it. The advent of dirt cheap isolated switchers makes the
>>> conversion to instrument
>>>>> voltages a lot easier than it once was. Pick a common voltage like 12,
>>> 24, or 48V and run with it.
>>>>> My answer to the frequency standard battery pack question has become
>>> “don’t do it”. It makes
>>>>> them a *lot* lighter weight !!!
>>>>>
>>>>> Bob
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>> -- 
>> Sent from Gmail Mobile
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