[time-nuts] Re: New-To-Me HP 5071A Questions

[paul swed]

Stan I don't own a 5071. It sounds like you really did score a heck of a
nice piece of gear.
With respect to the batteries if original are available thats the way to
go. You should have the make and model number on the batteries.
If not then I firmly believe the same shape, AH, and size SLA will work.
Also I seem to remember you could connect an external battery. I had a 5071
here for 3 months a number of years ago. If substituting a battery the new
ones typically have the float voltage stamped on them or in the spec sheet.
Just check that the 5071 is operating at the right voltage. To low and
never fully charges. To high and you heat the battery. Both issues shorten
life and available current.
Congrats
Paul
WB8TSL

On Wed, May 10, 2023 at 8:58 PM Stan via time-nuts <time-nuts at lists.febo.com>
wrote:

> Hello,
>
>
>
> I just scored an HP 5071A in excellent condition, and to my amazement it
> warms up and locks to the cesium as it should. Here are my questions:
>
>
>
> 1.      What are the ideal values for the various parameters that are
> displayed on the LCD screen? The Symmetricom manual shows only a range of
> expected values, with no indication of which values are more desirable than
> others.
> 2.      Which of these parameters give an indication of the
> health/remaining
> life in the cesium tube? The tube is a 10890A, with serial number prefix
> 3839A.
> 3.      The SLA batteries in my 5071A are essentially dead. I'm trying to
> charge them but do not hold out much hope. Are the OEM batteries still
> available? If not, can I substitute a couple of more generic 12V 2.5AH SLA
> batteries, like the Power-Sonic PS-1220, assuming that they will physically
> fit into the battery box?
> 4.      For the trivia experts: it appears that there are attach points for
> strap handles on the sides of the 5071A, but I've never seen a photo of one
> with those handles installed. What is the reasoning behind this?
>
>
>
> Thanks,
>
> Stan
>
>
>
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