It’s an older Efratom rubidium frequency reference.
Steve
> On Jun 9, 2018, at 8:34 AM, Dana Whitlow wrote:
>
> What is an 'FRK'?
>
> Thanks,
>
> Dana
>
>
>> On Sat, Jun 9, 2018 at 7:51 AM, ew via time-nuts wrote:
>>
>> Havi
ble delay is item 28 on the same page. It turns out the delay was not
needed in production since there was no deadband when it was shorted out.
I recall finding an article on the dual-d pfd that was earlier than my
patent but I forget where I found it.
oday.
The units have Maldon, Essex on the serial number plates.
I guess somebody in the timing community must have worked there.
Regards
Steve
Original Message
Subject: Re: [time-nuts] European Electronics Systems Radio Clock Model
100
From: gandal...@aol.com
Date: Fri, December 1
units and was just about to put one in a timing
rack at the museum.
Regards
Steve G8EBM
Original Message
Subject: [time-nuts] European Electronics Systems Radio Clock Model 100
From: GandalfG8--- via time-nuts
Date: Thu, December 14, 2017 1:59 am
To: time-nuts@febo.com
Does
Jim,
Forgot to add two things. There were two versions of the system - the rack
mount had 6 slots and the portable had 5. And the rubidium oscillator is an
Efratom FRK.
Steve
> On Dec 13, 2017, at 8:03 PM, Steve - Home wrote:
>
> Jim,
>
> I have an AS210 system that i
oscillator hides. It will be after the new year before I can have a look at
mine but I’m happy to help if I can.
Steve K.
> On Dec 13, 2017, at 6:56 PM, jim stephens wrote:
>
> Does anyone have a lead on the oscillator in this frame as far as repair /
> replacement?
>
> A frien
information would be gratefully received for the Radio Communication
Museum of Great Britain.
(thanks to Robert with the hint about plain text !!)
Steve Haseldine G8EBM
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Steve Sullivan here at Network Time Foundation. NIST actually contacted us to
ask where to distribute this information, which we in turn put out on the NTF
Blog, social media (Facebook and LinkedIn) and emailed the supp...@ntp.org list
and the NTF members list. By that time, there was a notice
plates
to please contact me again now that the door is open for another order.
Thanks,
Steve
WB0DBS
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1.
Happy Memorial Day, everyone!
Steve
WB0DBS
> On May 27, 2017, at 4:14 PM, Jerry Hancock wrote:
>
> Greg, to which adapter cable are you referring? From the PC to the DB9?
>
> What I did in the meantime was use breadboarding jumpers. The square female
> ends typically will
and a lot of time out of the machinist's
valuable offer to the group.
Please pay what you owe through PayPal to me by Friday midnight CDT. After that
the names will be listed so others don't get burned. I did this as a favor to
the group but I did not offer to lose money on the
Hi Fred,
Yes, got it and thanks!
Steve
WB0DBS
> On May 21, 2017, at 10:47 PM, Frederick Bray wrote:
>
> Steve,
>
> I assume that you received my payment? I sent it the day that you advised
> everyone of the total
>
> Thanks.
>
> Fred
>
>> O
nses are
$1.44 each in small quantities, retainers are $.26 in small quantities. You'll
want 4 of each. You'll have to slightly enlarge each hole to accommodate the
lenses. Again, these are not necessary for proper operation.
Steve
WB0DBS
_
Rushing to a flight and forgot the PayPal account:
steve-kr...@cox.net.
Steve
WB0DBS
> On May 12, 2017, at 1:55 PM, Steve - Home wrote:
>
> All,
>
> The endplate order is due to be delivered to the machinist by the end of the
> day today according to FedEx.
> Final c
ontact you when it's time to pay that part.
For the initial parts plus shipping you can pay by check or money order to me
at:
Steve Krull
1313 N. Emporia Street
Wichita, KS 67214
If you choose PayPal their fees are 2.9% + $.30 per order so:
1 pair = 13.00 + .38 + .30 = $13.68
2 pair = 26
Larry,
No missed emails on your part. I'm waiting on confirmation of the shipment with
final shipping cost before I calculate a firm price. Hope to have confirmation
today or tomorrow latest.
Steve
> On May 11, 2017, at 11:33 AM, Larry McDavid wrote:
>
> Steve, did I
nt to the group. We ask that you pay for the shipping from
him to you and he will be in touch when the plates are ready to ship.
Thanks,
Steve
WB0DBS
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s for two purchasers - David S and Arne. Please send
those as soon as possible.
The cost of the plates plus initial shipping should be paid to me. Payment by
check or money order to:
Steve Krull
1313 N. Emporia Street
Wichita, KS 67214-2832
If you elect to pay by PayPal my account is steve-kr...@co
Right now the numbers are up substantially and I've asked P-M to hold off until
later today before giving me a final quote.
Steve
WB0DBS
> On May 2, 2017, at 7:48 PM, Bob kb8tq wrote:
>
> Hi
>
> Right now you are at 26 plates. There may be a price break at 25 ther
I am about to place the order for the end plates for the TAPR GPS kits. The
order will be shipped to a list member who has offered to put his CNC skills to
work and create the holes in accordance with the drawings provided on the TAPR
web site.
I have orders logged for:
Steve K - 2 plates
t maybe
we can do a group order.
Steve
WB0DBS
> On Apr 28, 2017, at 1:18 AM, Art Sepin wrote:
>
> Folks,
>
> The TAPR GPS Kit documentation has been updated and revised for clarity (I
> hope). it includes details for purchasing end plates and also dimensions
> required
WoW . I don't know if I'm the first nut to see this but it was probably our own
Jim Lux I just saw on CBS's Innovation Nation
On Sat, 1/21/17, jimlux wrote:
Subject: Re: [time-nuts] 10MHz to 25MHz
To: time-nuts@febo.com
Date: Saturday, January 21,
benefit of the
stirred-in flux and excellent wetting does make paste a joy to use
compared to even good solder wire).
'Expired' solder paste can be a bargain.
Steve
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to contend with.
Steve, K8JQ
On 8/11/2016 4:06 PM, Chuck Harris wrote:
Lots of good suggestions have already been made, but for
me, a boom style stereo microscope, with a distance between
the objective, and the focal point of at least 3 inches works
fairly well...
One other thing that may
would be appreciated...
Steve
Steven P. DiMare
[cid:image001.jpg@01CEEB5C.8B852340]
Senior Mechanical Designer
Frequency and Time Division
34 Tozer Road, Beverly, MA 01915-5510
Direct: 978-232-1489 | Fax. 978-927-4099
Steven P. DiMare
[cid:image001.jpg@01CEEB5C.8B852340]
Senior Mechanical Designer
ystem still needs that frequency smoothing goal.
If the goal is the closest accuracy to instantaneous earth rotation
then UT1 makes sense. That would be desirable if the intended use is
as direct input to navigation or pointing, but I can't point to any
existing system that can use such an input.
stead UT2.
UT2 was the standard in the CCIR recommendations for radio broadcasts
before UTC with leap seconds (and in fact it was specified as the
underlying time scale in the first version of the CCIR leap second
document) specifically because it was smoother than UT1 over the
course of a year.
--
St
be
broadly shared between many hardware implementations.
--
Steve Allen WGS-84 (GPS)
UCO/Lick Observatory--ISB 260 Natural Sciences II, Room 165 Lat +36.99855
1156 High Street Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064
it to 0402 and 0.5mm pitch limits, if possible, and it'd
be an infill job done when the machines are idle.)
Steve
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Thanks all for the info about the GPS over-determined clock solution,
helps me much. Bill's suggestion to internet search the term absent the
hyphen turns up numerous hits as well.
Steve, K8JQ
On 6/25/2016 2:10 PM, Bill Hawkins wrote:
Try overdetermined as one word. Also include GPS i
h on "over-determined clock solution" did not turn up any
substantive hits.
What does "over-determined clock solution" mean?
Thanks.
Steve, K8JQ
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there, let time nuts be time nuts?
Steve
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hamber owner, so am starting to get nutty about RF amplitudes, which
is a whole new game...)
Steve
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Don't forget the Digikey !!
On Wed, 6/22/16, Richard W. Solomon wrote:
Subject: Re: [time-nuts] Measuring receiver...
To: "'Discussion of precise time and frequency measurement'"
Date: Wednesday, June 22, 2016, 9:20 AM
Back before Iambic
Paddl
I calibrated and repaired dozens of these beasts in the Air Force. A Fluke
207-1 was our reference standard at the time. Still have a 207-1 on the shelf
and the whip antenna in the attic!
Steve K.
> On Jun 7, 2016, at 3:21 PM, wrote:
>
> Well, This is probably not the origi
If it is like the 58540A or 58533A it will talk 9600/8/n/1 SCPI but it will
have fewer commands then the 3801 etc.
On Sun, Apr 10, 2016 at 11:55 AM, Bob Camp wrote:
> Hi
>
> Judging by what can be seen in the eBay listing pictures: That is a mid
> 1990’s design. I would
> *guess* that the same i
It doesn't look quite the same but is very similar to the HP 58540A and the
58533A - you can at least find some info on those models.
Steve
On Sun, Apr 10, 2016 at 8:02 AM, Pete Lancashire
wrote:
> So far found Zip
>
> -pete
> ___
&g
ave a use for the 19.2 MHz out
but have no idea what I can use the 9.6 kHz or 100 Hz outputs for. There is
also 1 PPS on the DB25 connector. No further useful SCPI commands have been
found.
I still think it is pretty cool to have a one off prototype from HP(that
also works!).
Steve VE7FM
On Sat, M
un if it
worked.
I have posted pictures and a firmware dump on the eevblog forum here:
http://www.eevblog.com/forum/testgear/prototype-hpagilent-gps-based-refererence-clocks-generator/
I'm coming to this group to see if anyone has any ideas or kn
Many thanks Chris and others (both on and off the reflector) for the
advice re antenna mounting. I should be able to do better than inches
above the awning, but 3-4ft is probably the best I can do. And it sounds
as if that should meet my needs.
Steve, K8JQ
On 3/9/2016 11:05 AM, Chris
would not be affected by the awning but thought I'd ask
before moving ahead with it.
Thanks.
Steve, K8JQ
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and follo
back
serving NTP time.
The virtues of having multiple NTP servers of different vintage and different
manufacture! Our Endrun Sonoma, HEOL upgraded Tymserve and Trimble units had
no problems and kept our telescopes pointed to the proper places in the sky.
--
Steve Grandi
National Optical
ts-worthy, but hints would be welcome.
Steve
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frequency standard • Oven Controlled Crystal Oscillators
(OCXOs) • GPS caesium clock
This doesn't sound like a reference source, or generally useful.
Steve
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The Symmetricom data sheet mentions the Option AUB antenna mast. What is
that? I don't find details of it. How does you mount the 58532A antenna
if the Option AUB mast is not available?
Steve, K8JQ
On 10/1/2015 3:19 PM, Gregory Beat wrote:
I received this e-mail earlier today (below)
Rakon has always impressed me .
From: Jim Lux
To: Discussion of precise time and frequency measurement
Sent: Wednesday, August 26, 2015 11:23 AM
Subject: [time-nuts] looking for SMT oscillator SC cut, with no oven
For a project at work, I'm looking for a good close in phase noise
o
pyEphem will get the sun position stuff for you.
-steve
On Sat, Jul 4, 2015 at 6:13 AM, Jim Lux wrote:
> I've got a project I'm working on to make a sophisticated sundial with
> moving mirrors. I've got a batch of Arduinos that move the mirrors to the
> appropriate p
> surely the GPS time isn’t run incorrectly forever.
Yes it is :-)
In simple terms, the integer part of the drift is removed by inserting extra
seconds every so often.
A count of those seconds is part of the GPS data stream and s/w displays which
timeframe you select.
Steve
--
Steve Pl
We used them as time transfer standards to sync the clocks at the Titan missile
sites to the clock at the host base. The sequence was clock sync at the host
base, travel to the site, sync the site clock, return to base and check timing
error. If the error exceeded x, repeat until the error was
ances between approx):
unknown (0.25 inch) ground (0.5 inch) ground
unknown (0.5 inch) unknown (0.5 inch) ground
I have done the usual Google and searched through the wenzel site. Although I
can find the package outline, I can't find an item with 6 pins.
Cheers
Ste
I finally powered up my Trimble Thunderbolt ("E") with a Motorola
antenna. There is a 10 MHz output. Unfortunately, I can't get Lady
Heather to tun more than 20 seconds without locking up. I have the
same issue on 3 computers - a Lenova Windows XP desktop with serial
port, a Toshiba laptop (US
pressure number reported by the local
weather forecast.
This is one of the dangers of relying on closed-source programs for science and
engineering; you can't tell what it's really calculating.
It seems like "what is the barometric pressure" should be a simple question,
bu
less flaky clocks? I think I'd pay
more money for a better clock to get away from the vagaries of LaCrosse.
Thanks.
Steve, K8JQ
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How about locking a couple of vco's and measureing voltage ?. ( after
calibration)
From: Richard Karlquist
To: time-nuts@febo.com
Sent: Tuesday, October 22, 2013 9:59 PM
Subject: Re: [time-nuts] Need to measure frequencies of two sources
simultaneously
On 2013-10-22 21:37, Bob Albert wrote:
On Oct 17, 2013, at 3:38 PM, Richard Karlquist wrote:
> If you are below 80 MHz, Linear Technologies makes a thermal power meter
> on a chip.
Alas, the LT1088 is no longer made.
http://www.linear.com/product/LT1088
Best regards,
-Steve
--
Steve Byan
Littleton, MA
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Steve G8EBM
-Original Message-
From: gandal...@aol.com
Sent: Thursday, August 08, 2013 7:14 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Rb video
Look again, the fully loaded -3dB bandwidth is specified as 300MHz:-)
Regards
Nigel
GM8PZR
In a message dated 08/08/2013 03:06:57 GMT
Great video. The distribution units are still available on eBay. I bought
two today.
Regards
Steve G8EBM
-Original Message-
From: David J Taylor
Sent: Tuesday, August 06, 2013 11:30 AM
To: Time Nuts
Subject: Re: [time-nuts] Rb video
Found this on Hack-a-day
http
and -15 volts available that I'd like to use
but not unless within acceptable limits. Does anyone know what the
power supply specs are?
Thanks.
Steve N8MYA
Medina, OH
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/DataSheets/Modules/DS_DB9-USB.pdf
Easy enough to solder wires straight to the pins (with heatshrink) or
to knock up a truly trivial PCB...
Steve
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https://github.com/m1dst/Trimble-Thunderbolt-Monitor
73, Steve N0XC
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Bill,
I have an HP3335 and often use it. I hope mine will keep running!
I'm sure there are others who could make good use of one of them.
Steve, N8MYA
At 01:06 AM 5/23/2013, you wrote:
Send time-nuts mailing list submissions to
time-nuts@febo.com
To subscribe or unsubscribe vi
ut nothing remotely like those.
Cheers,
Steve
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Steve,
Several of them smashed flat, stacked up, and jammed under a door make a
low-quality door stop...
Steve
WB0DBS
On Apr 11, 2013, at 11:10 AM, steve gunsel wrote:
> Hi,
>
> Not too long ago there was an interesting discussion here about RF
> connectors. I have always wo
Hi,
Not too long ago there was an interesting discussion here about RF
connectors. I have always wondered about the "F" connector - used by
the boxload in TV distribution.
Are they any good for anything else? Just curious. Thanks.
Ste
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How about one of those 2kw car stereo amps with a 555 input tone ?
--- On Wed, 3/27/13, Bill Ezell wrote:
From: Bill Ezell
Subject: [time-nuts] OT - DC-10 gyros
To: time-nuts@febo.com
Date: Wednesday, March 27, 2013, 1:40 PM
Well, I can come up with something topical, read on. :)
I saw a 'B
27;t abandon leap seconds in UTC"
then it has done its job.
Our hope for the meeting is to get beyond the standoff and contribute
solid technical details about what should be behind those arguments,
what is possible, what is needed to resolve the situation.
--
Steve Allen
end of this
week. We invite contributions which address the issues described in
the Call for Papers at the website.
Folks on the time-nuts list know how time gets into operational
systems. We would be glad to see some of that expertise at the
meeting.
--
Steve Allen
I have a TrueTime XL-DC that has an IRIG B plug-in that uses that same
Tri-Lobe BNC connector. I'm planing on changing these out to normal
BNC connectors due to the rarity and expense of trying to use them
as-is!
Steve
___
time-nuts ma
Long shot remedy : There is a front pannel push button sequence to turn off/on
the display.
--- On Tue, 12/11/12, Ulrich Bangert wrote:
From: Ulrich Bangert
Subject: [time-nuts] OT: Question on dead HP34401
To: "Time nuts"
Date: Tuesday, December 11, 2012, 5:52 AM
Gentlemen,
I own a dea
Or join and post to the EIP_Microwave Yahoo group - lots of good info showing
up there!
Steve
WB0DBS
On Dec 10, 2012, at 8:00 AM, "J. L. Trantham" wrote:
> Me too.
>
> I have two 545A's, one of which works and the other of which has issues with
> Band 3
I'm interested in two...
Thanks,
Steve
On Nov 19, 2012, at 8:04 PM, cdel...@juno.com wrote:
>
> "MINI-TIC" for DMTD work
>
>
> Hi Everyone!
>
> I've been testing a Miniature 2 channel TIC that Bert Kehren and Juerg
> Koegel
> and Richard Mc
The then Hughes Aircraft had a nice hybrid (microelectronic ) version of this
idea produced in Newport Beach.
--- On Mon, 8/27/12, Rick Karlquist wrote:
From: Rick Karlquist
Subject: Re: [time-nuts] HP/Agilet counter 53131A (not 53151A) trigger problems
To: "Discussion of precise time and fre
Didier,
What is the model number of the Symmetricom antenna? Do you happen to
know the difference in gain between it and the Trimble Bullet antenna?
Steve K8JQ
On 7/30/2012 2:46 PM, Didier Juges wrote:
Chuck,
I have one of the original red box TB. It came with the Trimble Bullet antenna
I can't imagine that we don't sanity check without baro , altimeters . Isn't
that the inspiration
for the Kalman filter ?
--- On Thu, 6/28/12, J. Forster wrote:
From: J. Forster
Subject: Re: [time-nuts] Spoofing GPS - news article
To: "Discussion of precise time and frequency measurement"
Great time was had by all. GRAIL exhibit fantastic. It is amazing what you can
do if
you know what time it is !
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That would be great. Softball tournament on Saturday in Newbury Park , JPL
openhouse Sunday.
--- On Fri, 6/8/12, Jim Lux wrote:
From: Jim Lux
Subject: Re: [time-nuts] Procom GPS4 quadrifilar antenna...
To: time-nuts@febo.com
Date: Friday, June 8, 2012, 1:26 PM
On 6/8/12 9:21 AM, steve
Is it worth driving from Thousand Oaks to Altadena for Snowcones (qty 5)
tomorrow ?
--- On Fri, 6/8/12, Jim Lux wrote:
From: Jim Lux
Subject: Re: [time-nuts] Procom GPS4 quadrifilar antenna...
To: time-nuts@febo.com
Date: Friday, June 8, 2012, 6:23 AM
On 6/8/12 5:20 AM, Michael Baker wrot
Then what happened ?
--- On Tue, 6/5/12, J. Forster wrote:
From: J. Forster
Subject: Re: [time-nuts] Paywall rant
To: "Discussion of precise time and frequency measurement"
Date: Tuesday, June 5, 2012, 12:45 PM
Good luck.
About 20 years ago, I bought out the entire library of a local R&D c
this is pretty amazing you should give it a look
http://www.missnews.net/biz/?employment=3751962
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Guess I waited too long to order. $60 for shipping - I'll pass.
Steve
On May 3, 2012, at 3:16 PM, Dan Rae wrote:
> On 5/3/2012 1:08 PM, Steve wrote:
>> Did the seller double the shipping cost today? I could have sworn it was $30
>> the
>> last time I looked at
Did the seller double the shipping cost today? I could have sworn it was $30
the
last time I looked at the listing.
Steve
On May 3, 2012, at 2:42 PM, "John Miles" wrote:
>> While I've not tried the recently suggested method for making it talk to
> LH,
>> I d
much in the way of counters. A
bunch of Racal Dana something-or-others from one of the test equipment dealers,
but that was about it, other than a non-working HP 5223L.
Best regards,
-Steve
--
Steve Byan
Littleton, MA 01460
___
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me-nut.
I did score a Julie Research Labs VDR-106 at the MITflea, so I guess I at least
qualify as a volt-nut.
I did spot the fellow with the leap-second T-shirt.
Best regards,
-Steve
--
Steve Byan
Littleton, MA 01460
___
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Are the Jupiter GPS engines still available?
Steve
On 4/14/2012 10:00 PM, Bill Dailey wrote:
Why not do this... Should be cheaper and offer better performance.. Especially
short tem.
http://www.jrmiller.demon.co.uk/projects/ministd/manual.pdf
Doc
KX0O
Sent from my iPad
On Apr 14, 2012
adio rooms. Don't know why the location was
classified - the Russian Navy watched it being built and monitored it
continuously...
Steve
On 4/13/2012 9:09 PM, J. L. Trantham wrote:
Where did you do troposcatter? I was a co-op student with AT&T and worked
on their troposcatter system
increased 10-12 db.
This was far from scientific but it gives me enough confidence that at next
opportunity I can take it up into the attic for further testing.
Steve
On Apr 13, 2012, at 8:57 PM, Pete Lancashire wrote:
> Here is what looks like from the inside
>
>
Too bad there wasn't an amateur radio allocation at 902 MHz in the early
1970's - the troposcatter stations I serviced would have been awesome -
2x 10Kw into paired 60' dishes, but no az or el control!
73,
Steve
On 4/13/2012 7:50 PM, paul swed wrote:
Hmmm nat hist. Makes for a
he antenna. Yes, really. For example, CONUS, you can have any number of 1
meter dishes. You might have to paint the dish.
-Original Message-----
From: Steve
Sender: time-nuts-boun...@febo.com
Date: Fri, 13 Apr 2012 19:31:16
To: Discussion of precise time and frequency measurement
Reply-To
out 40 ft AGL.
So far the shingled roof hasn't been a major obstacle and the GPS antennas are
above the HVAC ductwork. I'll see if there's any difference between this
antenna and the HP that's on the Z3816 now.
73,
Steve
WB0DBS
On Apr 13, 2012, at 1:52 PM, paul swed wrote:
&
On Fri, 13 Apr 2012 15:45:22 -0400
Ben Gamari wrote:
> I thought this[1] might be of interest to time nuts. It seems that
> some folks have been working on one obvious application to the new
> tool presented to us by the rts-sdr project: GPS reception. In
> addition to some discussion of software
Just got mine, from "Just_for_survive" on eBay. Poorest packing job I've
ever seen for an international package. Three wraps of newsprint and a
thin padded envelope. I'll know this weekend if its operational.
Steve
On Tue, Apr 10, 2012 at 11:14 PM, Chuck Forsberg WA7KG
Supposedly in stock:
http://www.futurlec.com/ICLinearOpAmps1.shtml
I've dealt with this company several times in the past, no problems other
than very slow shipment to the usa.(Some cases 2-3 months)
Steve
On Fri, Apr 13, 2012 at 12:46 AM, Burt I. Weiner wrote:
> Hopefully someone o
If you're a true Time Lord you have a TARDIS and don't really care what
time an arbitrary clock or clocks might tell you!
Steve
On Mon, Apr 9, 2012 at 10:35 AM, Tom Knox wrote:
This time serf stands corrected.
Thomas Knox
Date: Mon, 9 Apr 2012 17:23:08 +0200
F
hing like a 1pps
signal. Does anyone have any thoughts as to how stable an approach like
this would be?
Steve
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tates, it is still subject to be a
moving target. I'm naturally skeptical on all architectures that have
multiple channels, show me an architecture with cache or waits states and
i'll show you a problem ( in regards to real time, that is)
I stand firm that the only proper way to do thi
the control. Whatever changes you make to increase
precision are not likely to apply to any one else.
Those who do not see a problem are simply not objective in regards to the
scientific method. Just cargo cult science.
Steve
On Wed, Apr 4, 2012 at 11:42 PM, Mike S wrote:
> On 4/4/2012 10:41 PM,
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