Hi Brooke,
Now that looks like it has promise. I had forgotten about those. I see a big
selection on ebay. Maybe I can find one large enough that doesn't have a large
price.
Bob
-----------------------------------------------------------------
AE6RV.com
GFS GPSDO list:
groups.yahoo.com/neo/groups/GFS-GPSDOs/info
From: Brooke Clarke <[email protected]>
To: Bob Stewart <[email protected]>; Discussion of precise time and frequency
measurement <[email protected]>
Sent: Friday, July 8, 2016 12:18 PM
Subject: Re: [time-nuts] The home time-lab
Hi Bob:
A resonate transformer may solve your problem. I added one to my first
computer, See Fig 1.
http://www.prc68.com/I/comp.shtml#SWTP
http://www.prc68.com/I/Images/SWTP-01b.jpg
The oval shaped silver can oil capacitor is connected to a winding on the
transformer and resonates at 60 Hz. Think of
it as a filter centered at 60 Hz and as an energy storage device.
This removes line spikes and fills in narrow line drop outs.
https://en.wikipedia.org/wiki/Voltage_regulator#Constant-voltage_transformer
Here are models with capacities of: 300, 600, 1200 & 1800 VA:
http://www.hammondmfg.com/CVR.htm
Just search for "Constant-voltage transformer".
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
-------- Original Message --------
> 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
>
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