On Thu, Aug 28, 2014 at 6:30 AM, Bob Stewart wrote:
> Hi Attila,
>
>
> Is wood, nails, and asphalt shingle really that big of a problem at these
> frequencies? The antenna is within 2 ft of the highest point of the roof.
Depends on what you call a "problem". If you are getting a usable
signal
FTS had a patent on microcontroller steered cesium, which could
naturally have limited the spreading time of that technology.
Oscilloquartz at the time where more focused on the telecommunication
market and meeting the ITU-T G.811 PRC quality requirement, keeping
within +/. 1E-11 in frequency,
Hi
Simple answer - yes.
My observation over the years is that your typical roof absorbs quite a bit of
RF starting way below GPS frequencies. My *guess* is that shingles are a bit
lossy. Shingles + moisture more so. Shingles + dirt + moisture even worse. I
also believe that plywood suffers th
On 08/28/14 19:53, Javier Herrero wrote:
Hello,
Then it is a quite different beast to the EUDICS 3120, that they also
call OSA-3120... I note now that yours is a 3210, not 3120 :)
Regards,
Javier
The 3210 looks like a much earlier design, prior to the inclusion of
microprocessor control. Da
On Thu, 28 Aug 2014 20:59:28 +0200
Magnus Danielson wrote:
> > But the pipe is not such a good idea. All signals from high elevation
> > angle will have a long path trough the pipe, changing their phase
> > ever so slightly. How much, depends on the pipe, it's thiknes and material.
> > Whether it
Hello,
Then it is a quite different beast to the EUDICS 3120, that they also
call OSA-3120... I note now that yours is a 3210, not 3120 :)
Regards,
Javier
P.S. no, there is no known cure to the time nuts things interest. It
becomes chronic, and only gets worse ;)
On 28/08/2014 16:33, Chri
Attila,
On 08/28/2014 08:15 PM, Attila Kinali wrote:
On Thu, 28 Aug 2014 12:00:19 -0400
Dan Kemppainen wrote:
However, that raises a good questions, in terms of cones and shedding
snow. I wonder how a straight slender vertical pipe with capped end
would work. Say 6 feet long. Let the snow bui
On 8/28/2014 2:15 PM, Attila Kinali wrote:
On Thu, 28 Aug 2014 12:00:19 -0400
Dan Kemppainen wrote:
However, that raises a good questions, in terms of cones and shedding
snow. I wonder how a straight slender vertical pipe with capped end
...
But the pipe is not such a good idea. All signals
On Thu, 28 Aug 2014 12:00:19 -0400
Dan Kemppainen wrote:
> However, that raises a good questions, in terms of cones and shedding
> snow. I wonder how a straight slender vertical pipe with capped end
> would work. Say 6 feet long. Let the snow build on the top. You might
> loose a few degrees of s
Björn,
Can you provide links to some examples? A picture or two would be great!
Attila,
Almost all the snow we get accumulates. However it does settle, even
then by mid February it's not unusual to see 4 or 5 feet on the ground...
However, that raises a good questions, in terms of cones and sh
If you have tube-life and not other issues, it's about the same.
Also works for rubidiums, as the loop aspect here is essentially the same.
There can be *other* issues. For the 5060A for instance, you might need
to also adjust the crystal filter of the OCXO, as that too drifts out of
range, so
Is there a similar 'bring it back to life' procedure for the 5061A?
On Thu, Aug 28, 2014 at 12:32 PM, Magnus Danielson <
mag...@rubidium.dyndns.org> wrote:
> Chris,
>
> Do you have a GPS clock?
>
> First turn the operational mode setting from off to second step (ocxo +
> ion pump) and let it sta
On 08/28/14 14:39, bownes wrote:
Careful Chris, it sounds like you are developing the symptoms of the Vintage
strain of the time nuts infection. Next thing you know, you will be looking at
tall clocks.
Bob, who is debating the wisdom of non invasively synchronizing the family
heirloom tall cl
Chris,
Do you have a GPS clock?
First turn the operational mode setting from off to second step (ocxo +
ion pump) and let it stay there for a day or so.
Then, as the oven have stabilized, switch it over to third step, the
open loop mode, and tune the OCXO up against a GPS reference so that i
I have the same disease. I have the clock, but the wife thinks that is
insane. I don't get her concern at all??? Especially when she says "NO!".
Regards
Paul
WB8TSL
On Thu, Aug 28, 2014 at 10:39 AM, bownes wrote:
> Careful Chris, it sounds like you are developing the symptoms of the
> Vintage s
Careful Chris, it sounds like you are developing the symptoms of the Vintage
strain of the time nuts infection. Next thing you know, you will be looking at
tall clocks.
Bob, who is debating the wisdom of non invasively synchronizing the family
heirloom tall clock to the new cesium clock...
>
On 08/28/14 05:03, Javier Herrero wrote:
Hello,
Here is the manual I've. I have also some other documentations, and some
Oscilloquartz software for the OSA-5585, but I don't know if they are
very useful.
Regards,
Javier
Hi Javier,
Thanks for that and for the other replies. The 3210 looks l
On Thu, 28 Aug 2014 09:21:51 -0500
"Dave M" wrote:
> How far above the metal roof should I mount the antenna so reflections will
> be minimized, at least to the point of diminishing returns?
I've been told, that >2m is ok. Sorry, i don't have any hard numbers.
> The antenna will have a pretty
Attila Kinali wrote:
On Thu, 28 Aug 2014 06:30:14 -0700
Bob Stewart wrote:
Is wood, nails, and asphalt shingle really that big of a problem at
these frequencies? The antenna is within 2 ft of the highest point
of the roof.
Consider this: A lot of people complain about the reflections caused
On Thu, 28 Aug 2014 06:30:14 -0700
Bob Stewart wrote:
> Is wood, nails, and asphalt shingle really that big of a problem at these
> frequencies? The antenna is within 2 ft of the highest point of the roof.
Consider this: A lot of people complain about the reflections caused
by trees. But what
Note that the high accurcy geodetic snow cones for chokering antenns have moved
towards thin spherical designs.
--
Björn
Originalmeddelande Från: Chris Albertson
Datum:2014-08-28 15:17 (GMT+01:00)
Till: Discussion of precise time and frequency measurement
Rubrik: Re
Hi Attila,
Is wood, nails, and asphalt shingle really that big of a problem at these
frequencies? The antenna is within 2 ft of the highest point of the roof.
Bob
From: Attila Kinali
To: Bob Stewart ; Discussion of precise time and frequency
measurement
The same shape that keeps bird off the antenna also keeps birds off.
It is worth getting the tall cone shape no matter where you live.
On Thu, Aug 28, 2014 at 6:04 AM, Attila Kinali wrote:
> On Mon, 25 Aug 2014 10:48:51 -0400
> Dan Kemppainen wrote:
>
>> Also, I have a low cost antenna coming. I
On Sat, 23 Aug 2014 16:38:42 -0700
Bob Stewart wrote:
> Given that my antenna is just a puck at the peak of the attic (never got
> around to adding the DIY choke-ring)
A choke ring will not help you much in the attic. You already have lots
of reflecting and refracting surfaces/volumes above th
The similar, and more serious issue is bird-poop.
The pointed cone shapes you see for commercial timing receiver
antennas are as much to keep birds from sitting on top of the antennas
as it is to get the snow off.
At least snow will eventually melt off.
--- Graham / KE9H
==
On Thu, Aug 28, 20
On Mon, 25 Aug 2014 10:48:51 -0400
Dan Kemppainen wrote:
> Also, I have a low cost antenna coming. It's one of the Synergy systems
> puck type amplified antennas. I remember some time back a bit of chatter
> about improving GPS antennas for timing, by providing some sort of guard
> ring or choke
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