No PLT (or much else) QRM then either.
See http://plt.g7cnf.me.uk/faq.htm for some info.
Not my site, but one that is easier to read and get a grip on the
subject. This stuff can seriously screw up all sorts of things,
especialy if you have to use something like WWV at any time with a PLT
I will try Joe's idea of using a doorbell buzzer to introduce
vibration.
It's not easy to generate 1KHz vibration without professional
(and heavy) equipment :)
Use a small loudspeaker (of the type found in small portable radios, or
old PC monitors) with as large a metal nut as practical
Message: 4
From: saidj...@aol.com
That is a big concern of ours of course!
It's a massive voice coil in the shaker..
bye,
Said
In a message dated 4/13/2010 11:20:16 Pacific Daylight Time,
n...@gruending.net writes:
True enough, but don't forget that a shaker table is a
This might interest you
http://www.members.shaw.ca/swstuff/gpsreference.html
These people can cal' it, they say.
http://www.raelectrical.com/services/anritsu-2.htm
There are several other hits, including other people who stock used
items.
Amazing what you find when you google
My guess
Milk, or plain Yoghurt will kill the Chilli Pepper fire almost
instantly!
I forget exactly how, but it's a chemical reaction between some part of
the dairy product, and the active part of the chilli spice, neutralising
things rather well. It's also how the Indians make a creamy mild curry
Relatively easy to do in principle, and good no doubt that this would be
results wise, it's suddenly not a DIY project any more for 99% of
people.
Cheers.
Dave B
G0WBX.
Original Message
Date: Thu, 18 Mar 2010 12:46:14 -0400
From: Bob Camp li...@rtty.us
Subject: Re: [time-nuts]
Hmmm. Another two digests missing.
Hi...
I feel that a simple Bang Bang (?) controller is not going to give you
what you seek.
To get truly accurate and stable temperature control, you will almost
certainly need a full PID controller, with some sort of variable
control of the heating
Hi.
Anyone else using the digest delivery method, seeing gaps in delivery?
Like, today, issue #54 turned up OK, but prior to that, the last one was
issue #49!
Looking in the message archive, there does not seem to be enough
messages to justify for 4 full digest mails.
I often see 1 go missing
Sorry, it's already been done I believe.
http://freenet-homepage.de/dl4yhf/speclab/earth_venus_earth.htm
Some years ago, like nearly 20, I helped some friends and built a 224
element broadside colinear aray for EME. It (eventualy) worked realy
well. Echoes could be heard under good conditions
You'll need somwhat more than +14V for a generic 7812 to regulate
correctly.
Also, remember the local (to the regulators) decoupling caps, or some of
them make quite good HF oscilators!
See the data sheets for the particular regulators used for exact
details.
Dave B.
-Original
Because some people do not seem to know how to trim email, so their
individual reply mail to the list, also contains the entire digest they
just received! Not just the mail they were replying to.
Sheesh...
Dave B.
Original Message
Most mailing list softwares send either at a set
Hi..
If the price is right, the 8590 analyzer if healthy makes a good
introduction to that class of instruments, you'll learn a lot.
Yes, they are not the top of the range, but they are not shabby either.
Get yourself signed up to the HP_Agilent group (also on Yahoo) for
detailed info, and they
It's a very good device.
Used in 1000's of Softrock SDR's arround the world now.
Control software (by various means, including USB) can be found courtesy
of the Softrock40 group, on Yahoo.
http://groups.yahoo.com/group/softrock40/
73.
Dave G0WBX.
--
Message:
A question (or two) if I may, not being a T'Bolt owner/user. (Yet.)
Re the 1PPS output.
Can it be selected to be wider than the 20uS or so illustrated recently,
or will NTPD (on FreeBSD) work OK with that pulse as is? I know TAPR
have a FatPPS kit, just a monostable in essance.
Works OK here.
FF3.0.x XP SP4 + all updates.
You need scripting enabled, and Google Earth loaded on the machine. You
can block GoogleAnalytics if you need.
Otherwise, it works fine.
Dave B.
F/G0WBX
-Original Message-
Subject: Re: [time-nuts] FW: HeyWhatsThat: January 15 Solar
Hi
My guess, is it's a mechanical failure, as unless you've had a series of long
power cuts, the battery/quartz backup won't kick in. AFIK, the Quartz clock
only is in effect, if the 50Hz supply fails. The utility 50Hz is maintaind to
a close tolerance and tweaked to maintain a very
For many failed hard drives, it's not a hardware failure at all, but
a very corrupted data surface, rendering even the drives own error
recovery useless, so the OS won't boot, or comes up in an altered
state or similar woe.
If the drive spin's up, and you can see it OK in the list of devices in
, it's where the name was adopted from, for junk email.
Regards to All.
Dave Baxter.Soon to go and try to fix a couple of multi kW RF amps,
a customer has let the high pressure recirculating smoke out of,
again
73.
___
time-nuts mailing list
For that you need a Moondial! ;-)
In the old days... Cub Scouts were taught to find a basic direction
from the way moss grew on the south facing (in the Northern Hemesphere
at least) side of trees.
These days, it's easier to tell them to look at Sky TV dish's. (UK
satellite TV service)
Hi.
In your LH shortcut, if you haven't already, you may want to make the
Start in: setting, to be the same folder path, as the .exe your
invoking with the shortcut. That can often (depending on what other
files the .exe needs) make a big difference to performance and
stability.
Right click
Hi.
The Monterey Bay jammer, was indeed a UHF TV active antenna. But, it
was hooting at about 1500MHz, that's what corrupted the GPS signals in
that area. It's not unusual, there are many such documented cases from
all round the globe of similar instances, and it's not just GPS systems
getting
Thanks John...
It was pre my usual caffine intake...
Dave G0WBX.
-Original Message-
From: J. Forster j...@quik.com
Subject: Re: [time-nuts] Loran C shutdown
Hyperbolic, not parabolic.
-John
Someone may correct me on this.
But isn't Loran a parabolic
Someone may correct me on this.
But isn't Loran a parabolic navigation system? So, the further away
from the chain of transmitters you are, the positioning quality (for
want of a better word) will deteriorate. I seem to remember reading
that you need a good spread of directions for the
-Original Message-
From: Ray Hudson hudson...@yahoo.com.au
Brian use PDF999http://www.pdf995.com/ its a printer
driver that prints to PDF file. When installing it just
untick all the other junk it wants to install. You get a few
of ads when using it but its free otherwise.
The /NoSerialMice thing in Boot.ini appears to work for me on Win2k
and XP, just fine, with all sorts of devices that are permanently
attached to a com port. (Without any extra parameters, it will not
look for rodents on any serial port, according to MS's blurb.)
The registry settings would
Am I missing something?
Why not just query the system, and ask it what it knows about the screen
in use?
Other software tools and utils can do it, I even remember doing it in
QuickBasic back in the dark old DOS days, when you were seen as a minor
deity if you had anything larger than a 640x480
Hi...
I use mostly NI GPIB cards adapters, but from the little work I've
done with the HP/Agilent stuff, I think the same overall principle
applies, re software development for instrument control.
First step...
Install the USBGPIB adapter drivers, tools and utilities Exactly as
the instruction
Two YEARS later?
I sometimes have trouble understanding what I got working days ago! G
But yes, that was what I was going on about.I also keep all my less
than successful software projects and ideas, as often though the
overall result was not what was wanted, plans changed, I ran out of
Sorry Stefan..
Yes you are of course correct in that no compiler/interpreter (I know
of) checks comments for correctness. But that's not the point of
them. They need to be there to describe the intended purpose of the
code, above the actual implementation.
If you have to modify code (yours or
Jerome...
As others have said, you *Must* use Agilent's software tools with their
hardware, not NI's.
There are other GPIB/IEEE488 software vendors who's tools can use NI's
and other third party controller cards, but NI software will only be
able to use NI hardware.
So, you need to go find and
Date: Thu, 1 Oct 2009 23:13:33 -0400
From: David I. Emery d...@dieconsulting.com
Subject: Re: [time-nuts] GPS from a window seat
I never had anyone from the airline bother me about doing this
(discretely) UNTIL a recent flight this August from Boston to
London Heathrow on American ...
Hi.
We had a Marconi 6960 power meter power inlet filter do exactly the same
here a few months ago... As you say, a nasty mess... Wasn't a
Schaffner filter though...
Just cleanup the mess and replace the filter with a like replacement,
they are all made to a similar specification. There
You could try replacing the fuse temporarily with a suitably rated
filament lamp.
You'll need to figure out what volts/power etc, from what the fuse is
protecting, and the fuse's rating.
But, if done (and it's not too difficult) you end up with a self
indicating current limit! (Of course, you
Just to illustrate the madness these people instigate...
We can't even ship by courier a well protected (in a tri-wall box, in
dense chippings, in a wooden crate) a 5 gal' drum of Multitherm PG-1
thermal transfer fluid, a refined Pharmaceutical Grade mineral oil, in
the UK, because It's
Nah...
That'll polish out OK!...
Dave G0WBX.
--
Message: 4
Date: Fri, 04 Sep 2009 02:13:27 -0600
From: Ed Palmer ed_pal...@sasktel.net
Subject: Re: [time-nuts] OCXO sensitive to gravitational effects
To: Discussion of precise time and frequency measurement
While looking for something else, found this...
http://www.diolan.com/common/products.html
USB to whatever, with code examples.
Not cheap, but the documentation looks good, and that's often worth the
cost alone, even if you are funding the thing from your own pocket!
Dave B.
And this came to light.
http://www.mat.ucsb.edu/~dano/CUI/
scroll down.
Google on Arduino USB too.
There is lots of stuff out there for the adventurious with lots of time
to play, as well as for those that *Need it now!* and can pay.
Regards.
Dave B.
Yep, that works.
Many of the Softrock SDR kits use that method (Bit Banged USB) for
control of the local oscilator, filter selection and other IO. Works
well, when it works. When you get the drivers mismatched, it can be
hell! It's also limited to the low speed protocol, so there are some
Thanks John for the reminder about PortTalk. That's another tool I
couldn't remember the name of, it seems to be useful for enabling
existing legacy programs to have some extended life in the NT world. I
had tried it in the past, but there are issues with it, or there were a
couple of years
Just some general info on the subject of ad-hoc/experimental IO from
within the Windows environment.
I personally think, that if you want to keep a T'Bolt at a constant
temp, it's best done with an independent control system (hardware or
software) than any attached PC. In the long term anyway.
Hi...
The other (little known) Feature of some of the later UPS's, is that
once fully charged, and if shut down the right way, you can often power
them up Off Line as a portable source of AC power if you so need. On
a light load, they run for quite a long time! OK, so the run time can
be short
examples use
alumina ceramic. (I think that's what it's called.)
We have several scrap TWT's and Buckets of scrap QRO semi's here at the salt
mine, that we just can't dispose of as a result. Thankfully, they don't take
up much space.
Regards.
Dave Baxter
Not just the Eastern block, or Far East...
Remember the Plessey SL600 series of communicaiton signal processing chips?
Originaly in 8 and 10 pin TO5 can's, later in plastic DIP's, as the 1600 series.
Sadly missed here by many these days.
Dave Baxter.
--Original Message
.
Covering all of these, take a look at the Olimex site:- www.olimex.com
Select Development boards, and explore from there. I'm sure you'll get
other ideas... Their prices are good, and they ship fast.
Regards.
Dave Baxter.
-Original Message-
Message: 1
Date: Thu, 30 Jul 2009 21:00:51
Very nice!
And at those prices, why bother to roll your own, unless you have some
truly unique need.
Thanks for the tip off.
Dave Baxter.
-Original Message-
Message: 1
Date: Thu, 30 Jul 2009 22:17:24 -0700
From: Tom Van Baak t...@leapsecond.com
Subject: Re: [time-nuts] Multiple
Old scrap PC network cards?
The DC-DC isolated converters are useful to pull too.
Dave Baxter.
--- Original Message ---
Message: 6
Date: Thu, 30 Jul 2009 00:16:12 -0400
From: Dave M masond...@comcast.net
.
. Trimmed !
.
Also, looking for a source of low cost 1:1
admire the ingenuity of it all...
Regards to All..
Dave Baxter.
-Original Message-
2. Re: Where does 28V come from? (Robert Atkinson)
3. Re: Where does 28V come from? (Poul-Henning Kamp)
4. Re: Where does 28V come from? (Lux, James P (337C))
5. Re: Where does 28V come from
Message: 7
Date: Thu, 16 Jul 2009 04:42:13 -0700 (PDT)
From: Stanley Reynolds stanley_reyno...@yahoo.com
Subject: Re: [time-nuts] New Thunderbolts available without a power
suppy?
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Message-ID:
I never even saw the message announcing they were avaialable! I've
checked back in my archive, it never got sent to the digest as far as I
can see. Yahoo are messing with things, so ???
I also subscribe to the TAPR announcement list, but other than call for
papers etc, I never see anything on
Message: 5
Date: Wed, 15 Jul 2009 04:13:22 EDT
From: gandal...@aol.com
Subject: Re: [time-nuts] More Thunderbolts available.
To: time-nuts@febo.com
Message-ID: d2b.52083e74.378ee...@aol.com
Content-Type: text/plain; charset=US-ASCII
In a message dated 15/07/2009 09:02:26 GMT Daylight
that triggers the flip-flop that drives the LED. You never know
(there are unused pins on it's IO connector inside the case)But
the circuitry is just too small for me to see, let alone probe with a
'scope! So, I'll keep them for use with trackers.
Best Regards..
Dave Baxter.
G0WBX.
snip
Date: Thu, 9 Jul 2009 01:46:07 +1200
From: Steve Rooke sar10...@gmail.com
Subject: [time-nuts] GPS just got very accurate
Was just checking the GPS status page of my Truetime NTP
server and it reported Number of Satellites Tracked 892!
Quite apart from it only being able to track 8
+0100
From: Dave Baxter d...@uk-ar.co.uk
Subject: Re: [time-nuts] GPS just got very accurate
To: time-nuts@febo.com
Message-ID:
fad0f39d8fa7f440861941a74b1ae5602fd...@sbsserver.aremv.local
Content-Type: text/plain; charset=us-ascii
Date: Thu, 9 Jul 2009 01:46:07 +1200
From
Just found these on eBlag.
Way outside my price range, but...
220445049656 Not sure if it actualy does GPS disiplined stuff, as there is no
GPS antenna socket!
180370118043 Still too rich for me. And when you consider even a new NSLUG
is about £65, and the GPS is not an expensive item
Yes Chris, I did notice that. (red herring that is)
But I also do know that many people do indeed put various flavours of
Linux etc on the Slugs as they are known, for all sorts of odd
purposes. So (subject to enough memory) I suspect they could do the
job, somehow. What that was advertised
-8859-1; format=flowed
Dave Baxter wrote:
Personally, I wouldn't bother with any high accuracy
clock/oscillator
for the SDR, unless you can also synch the AD sampling clock in the
soundcard.
The SDR-IQ, SDR-14, Qs1r, Perseus and the HPSDR project do
not rely on a sound card ADC
Hi Brad.
Just catching up with this, after a hot weekend, and doing White Van
Man impressions on (an even hotter) M1 this morning...
Personally, I wouldn't bother with any high accuracy clock/oscillator
for the SDR, unless you can also synch the AD sampling clock in the
soundcard. As that will
-1; format=flowed
Dave Baxter wrote:
Doing that with BNC's will lead to a flaky connection, as
the centre
pin on the 75r ones is much smaller. The other way round (50r plug
into 75r
socket) will damage the socket. As TNC's are very similar
to BNC's ???
You are thinking
Chuck, please realise we're in the UK, not the US, so things are significantly
different in many ways...
TV coax hear is really cheap cruddy stuff, if you're very lucky you might get
50% braid/shielding coverage! There was no real need to prevent ingress or
egress of signals, as (other than
Hi All...
Some interesting semi off topic discussions of late, very interesting.
Re the water in plastic bottle problem. (I seem not to have seen the
original message, there again we've had transient email/isp problems
here recently)
A Vacuum formed by any migration of the contents will not
Is this good value, and a trusted seller?
I went looking for Fluke1 as listed earlier on here for these devices
(Thunderbolt GPS disciplined referenced sources) but though I
(eventually) found the user, no activity was shown for some time. So, I
went looking for the product instead, and found
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