[time-nuts] The home time-lab

[Clay Autery]

Bob,

I'm new to the time nut thing...  What is the 5370?  Full nomenclature
so I can read up on it.

I don't know how much power it draws, but I've ted to run all my HAM
(including the amps), networking, home theater, lab equipment, et al.
from appropriately sized batteries and charge the batts with linears. 
Mostly going to use LFP batts for the longevity and cell balancing.

I don't like weird crap creeping into my data either... be it instrument
or radio...  I'm building a "quiet zone".

Did the survey on JUST my house and found 53 SMPSs, and a bunch of AC
electrical wiring "mistakes", mostly grounds terminated at both ends, et
al...

73,

______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/8/2016 12:46 AM, Bob Stewart wrote:
> Hi Clay,
> Powering the GPSDOs isn't a problem.  They run on 12V and draw less than an amp.  The problem is that 5370 is a big hulking power sink and it appears that when it's hit with a spike it lets its displeasure be known in the data.
> Bob -----------------------------------------------------------------------------------
> GFS GPSDO list:
> groups.yahoo.com/neo/groups/GFS-GPSDOs/info
>
>       From: Clay Autery <cautery at montac.com>
>  To: time-nuts at febo.com 
>  Sent: Thursday, July 7, 2016 10:09 PM
>  Subject: Re: [time-nuts] The home time-lab
>    
> You'd be better off running the GPSDO off a LiFePO battery and float
> charge the battery with an appropriately constructed linear PS...
>
> ALL but the most expensive UPSs use switch-mode power supplies... to
> power the load when on mains.
>
> ______________________
> Clay Autery, KY5G
> MONTAC Enterprises
> (318) 518-1389
>
> On 7/7/2016 7:44 PM, Bob Stewart wrote:
>> I hope this isn't too far off topic, as this is having a big impact on my testing.
>>
>> I decided to run an A/B test on one of my GPSDOs: comparing the phase of the two 10MHz output channels.  In the middle of the night, there was a long series of 35ns pops in the phase data.  Strangely enough, there was nothing in the data collected directly from the unit involved.  The preceding two days we had had a number of switching transients where the lights blinked but nothing shut down.  So, putting one and one together, I suspect that a fair percentage of the strange results I've been getting has been power-grid related.
>> So, what to do?  I've been looking at UPS devices, and I don't even understand enough to waste my money on a bad one.  The two big questions seem to be "on-line" and "sine wave".  Make that three: can I trust the mfgs claims?  Is there something affordable that could run a pair of 5370s and maybe another 50W worth of DUTs for up to an hour or two and not be prey to power-line transients?  Or would it be more cost effective to somehow monitor the power line for spikes or phase jumps and blow off tests or cut out the offending data?  From time to time we get a thread on power-line nuts.  Should I have been paying more attention?
>>
>> Bob - AE6RV
>>   -----------------------------------------------------------------------------------
>> GFS GPSDO list:
>> groups.yahoo.com/neo/groups/GFS-GPSDOs/info
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