Hey Graham,
I'm gonna start a project soon to evaluate a F9P as a Time Transfer GNSS
receiver. For now i haven't too much answers for you but only i know is:
the BIPM uses all labs that participate from UTC to make corrections of
GNSS satellites frequency, also for the TAI use. I think GNNS T is
Has anyone got this , is the PIC read data prohibited ?
Is it still a closely guarded secret?, there were some very clever and
novel ideas used in that slab, in my opinion.
Glen
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I have several questions for the group, since there are several members
that have been able to start evaluating the uBlox F9P and perhaps the F9T
GNSS receivers.
For the purposes of time and frequency determination, is there an advantage
to using the GNSS receivers, relative to just the US GPS?
Am 05.07.19 um 23:26 schrieb Poul-Henning Kamp:
In message <28f942e8-b61d-4fa5-929d-923184828...@n1k.org>, Bob kb8tq writes:
Energy flow is indeed inside the cable if things are set up and operating
correctly.
Please note in this context that *nothing* about lightning strikes
works
On 7/5/19 2:26 PM, Poul-Henning Kamp wrote:
In message <28f942e8-b61d-4fa5-929d-923184828...@n1k.org>, Bob kb8tq writes:
Energy flow is indeed inside the cable if things are set up and operating
correctly.
Please note in this context that *nothing* about lightning strikes
works the
In message <28f942e8-b61d-4fa5-929d-923184828...@n1k.org>, Bob kb8tq writes:
>Energy flow is indeed inside the cable if things are set up and operating
>correctly.
Please note in this context that *nothing* about lightning strikes
works the way you would assume it does.
Cables run
Er du Norsk? Ole Petter Rønningen er et Norsk navn.
-Original Message-
From: Ole Petter Ronningen
Sent: Friday, July 05, 2019 10:04 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] It is possible to "recharge" a hydrogen maser?
Just change the
Hi
The purpose of coax is to shield the signal. The outer portion of the cable
acts to protect the inner part from stray signals in the environment. In a
normal
system, the outer braid is connected to ground. It is no different than a lot
of audio
cabling in that respect.
Energy flow is
On Fri, 5 Jul 2019 at 18:01, WigglePig wrote:
> If there are currents in the braid to upset then your antenna system is
> not working as you might believe.
>
I was working on the simplistic assumption that for a current to flow,
there must be a complete circuit, so the current flows down the
Hi Luiz,
We replaced H-source one Kvarz active HM during the summer of 2016. After
6-9 months of so of 'warm up' and settling down it is back up to maximum
TAI weight.
We got the new H-source bottle (size of a mini coke-can) and instructions
from the manufacturer.
>From what I recall the steps are
My experience is limited to the MHM-2010 at the Arecibo observatory, but I
suspect they all
handle the H2 supply in pretty much the same way.
Th hydrogen comes from a reservoir, in the case of the MHM-2010 from a small
"lecture" bottle of H2 under pressure. I assume that this is isotopically
Hi
Anything is possible. Working out exactly what happened and what needs to be
done
to fix it might be a bit involved. A maser is a pretty complicated piece of
gear.
The best bet is to dig out the manuals and go through the troubleshooting
process in
them. Plan for it taking a bit of time
Just change the bottle, or hydride cartridge, whichever it is. But it is
also very possible that the ion pumps are at the end of their lives, but
these can also be replaced "easily". What type if maser is it?
Ole
On Fri, Jul 5, 2019 at 7:01 PM Luiz Paulo Damaceno <
luizpauloeletric...@gmail.com>
Hi,
> Plus as the pole moves in the wind (they all do) the cable can move
> about inside, and if repeatedly impacting the inside of the pole over
> time, that will damage the cable.
You fix the cable inside the pole by applying three cable ties as a
triangle in regular intervalls. The loose
If there are currents in the braid to upset then your antenna system is not
working as you might believe.
> On 5 Jul 2019, at 10:46, Peter Vince wrote:
>
> Thank you all for your replies. A case of a little knowledge being a bad
> thing in my case. But at least I was aware of a potential
Hi friends,
We have a hydrogen maser here at the university that i work. It seems the
hydrogen is over. This is possible? If yes, It is possible to recharge It?
Best regards,
Luiz.
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On 05/07/2019 06:01, Gerhard Hoffmann wrote:
>> Hello all,
>>
>> A new contact, whose background is in computer programming rather than
>> RF, is getting into accurate GPS positioning, and has been tapping me for
>> any knowledge I might have. I persuaded him to get the new Ublox F9P
>>
Thank you all for your replies. A case of a little knowledge being a bad
thing in my case. But at least I was aware of a potential problem to be
considered! :-)
Thanks again,
Peter
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In a (almost) ideal coaxial cable (almost) *all* RF electromagnetic field is
inside the cable.
Unlike ladder balanced transmission line where it is everywhere else in the
universe.
Leo
> From: Peter Vince
> sure of the best advice to give him. I'm sure I heard that you should
> never drop the
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