I wonder how much such an environment would improve time-nut equipment
performance and measurements? They claim a 2-3x resolution increase in a STM.
http://arstechnica.com/science/2015/07/inside-the-quietest-room-in-the-world/
In looking at the threads and putting away the Austron catalog I realized I
have a 2100 pdf with schematics.
Its 8.9 MB so will send it to the Diddiers KO4BB site tonight.
Regards
Paul
WB8TSL
___
time-nuts mailing list -- time-nuts@febo.com
To
Is there any stability benefit to having a bunch of coupled pendulum
clocks?
On Wed, Jul 29, 2015 at 4:22 PM, Bill Beam wb...@gci.net wrote:
These University Of Lisbon Scientists have rediscovered a very old wheel.
Old physics: Two coupled nearly identical harmonic oscillators have two
A lack of precision in that last email from me it seems.
I was planning on using a DDS and re-purposed multiplier board to provide
the 1.5Ghz LO, but as the time server needs to use the 10MHz signal to
compensate for phase shift this won't necessarily work out as you have
indicated.The
Hi
He had them down in price for a while and then moved them back up again.
Bob
On Jul 30, 2015, at 12:16 PM, paul swed paulsw...@gmail.com wrote:
Bob
Just took a look and the pair seems to still be at $150. Maybe it was a
special?
The ovens are as you say $25 each and shipping for
Yes, I picked up the correct OCXO, from the same eBay seller (Massachusetts)
that earlier sold NOS MTI units. Cross referenced the part number from earlier
TS2100 posts here on time-nuts.
--
I have the Pace desoldering system, so that and some liquid flux should ease
the TCXO removal and OCXO
Hope there is something in this manual
http://www.awa.tohoku.ac.jp/~kazumi/Trigger/xl-ak-manual.pdf
On Thu, Jul 30, 2015 at 8:54 AM, jim s jwsm...@jwsss.com wrote:
I picked up one of these from the usual site, and it is supposed to be in
working condition. I wonder if someone may have a
It is a common fishing technique, and the guy has done this
several times over the last year, or so.
When his sales dry up, he drops the price to $100, and then
waits for a sale I'm pretty sure that he monitors this
group for news of the new low price to leak out... and then
quickly he bops
Bob
Just took a look and the pair seems to still be at $150. Maybe it was a
special?
The ovens are as you say $25 each and shipping for either 1 or 2 is $18.75.
Regards
Paul
WB8TSL
On Mon, Jul 27, 2015 at 8:44 PM, Bob Camp kb...@n1k.org wrote:
Hi
For all of you who dropped off the list back
I picked up one of these from the usual site, and it is supposed to be
in working condition. I wonder if someone may have a suitable antenna
for it I might acquire, or a pointer to one that will work.
It is the type with a 5v amplifier in it from what I was told, and is
working.
I have
My understanding is that MVAR(m*tau0) is equivalent to filtering the phase
samples x(n) by averaging m samples to produce x'(n)
[x'(n)=1/m*(x(n)+x(n+1)..x(n+m-1))] and then calculating AVAR for
tau=m*tau0 on the filtered sequence. Thus, MVAR already performs an
averaging/ lowpass filtering
On Jul 29, 2015, at 11:23 AM, Mike Niven mfni...@ymail.com wrote:
Thanks for the comment Bob. Tracing Efratom through the ages, I see they are
now Microsemi. I wonder whether they will still have a lamp for such a
geriatric Rb source and at what price - probably more than the cost of
In message 20150729122104.a7350...@for04.foreach.it, Marco IK1ODO -2 writes:
Anyone has an Austron 2000C for sale? Need one for an experiment.
Please offlist to ik1odo@gmail-com
Be aware that there are no current Loran-C transmissions you can
receive with it, unless it has been modified
Hi Mike,
The Rb lamp voltage is just a guide. If your Rb isn't working, then it
is important... If it is, it is just a guide.
If your bulb is clear, and it is glowing, it is probably also working.
I seem to recall from HP's descriptions of how their 5065 was made
that the lamp, and filter
Thanks to another TN member (Matthias Jelen) the necessary RS232 cable pin
connections to connect the SR620 to TimeLab have been determined:
DB9 (PC) - DB25 (SR-620) 1 - 8; 2 - 3; 3 - 2; 4 - 20;
5 - 7; 6 - 6; 7 - 4; 8 - 5
Further, it turns out that there is/was a commercially
The TymServe TS2100 arrived this afternoon. So I started with the GPS receiver
swap (update).
I removed the Trimble ACE III receiver (39818-C), but noted that this specific
unit had a widget board (65398.69) on the SMA antenna connector and 2 wires
(DC power) to the 3-pin header on the main
Jason
If you build a single conversion front end as you suggest, then the LO will
be 1500 MHz and low side injection causing a 180 degree phase flip.
Hopefully not a real issue.
The thing I ran into when I built my solution is that front end LO had to
be locked to the 10 Mhz out of the Austron.
Greg,
I did both those upgrades a few weeks ago and have been very pleased with
the results. Desoldering the TCXO is a bit tricky and takes some
patience. I do not have the widget board in my TS-2100 so I'm not much
help there.
I assume you already have your OCXO...The correct one is a bit
Hi
In the (unique) case of the Efratom “light bulb” cell, you can indeed pop them
out and replace them. Been there / done that with the (then) factory guys
involved.
The new bulbs were sold as replacements and did indeed fix the problem of
a dead bulb. About the only added work involved was to
Anti-injection locking? Christiaan Huygens first noticed the injection
locking effect for pendulums hung from a common beam, maybe they
anti-injection locks when on a common surface...
On Wed, Jul 29, 2015 at 5:54 AM, Hal Murray hmur...@megapathdsl.net wrote:
University Of Lisbon Scientists
Hi
There are a *lot* of possible ways a pendulum can synchronize. In
reality, there may be multiple cases with different mechanisms.The gotcha
has always been *proving* that this or that mechanism is “the one” in
a specific case.
Bob
On Jul 29, 2015, at 2:44 PM, Bill Hawkins b...@iaxs.net
These University Of Lisbon Scientists have rediscovered a very old wheel.
Old physics: Two coupled nearly identical harmonic oscillators have two stable
states.
They will operate with relative phase = zero or 180deg. How they are coupled is
not
an issue; they only need to be able to transfer
Joe Leikhim jleikhim@... writes:
I raised this on the Duncan Steel website and was pretty much blown
off.
Oh there is a nice stable OCXO aboard etc.
Well DUHH yes there is an OCXO aboard and if it is good to -20 to
+75C,
or just -20 to +60C and there is a huge fire raging around it
23 matches
Mail list logo
