We've been on the new version of Mailman for a couple of weeks now. The
main reason for the update was to work around the DMARC adoption by
Yahoo, AOL, and other large ISPs that broke the mailing list model.
That seems to be working now. I'll spare the technical details (you can
read about it
Yes, I'm pleased to report that with help from a couple of 'nuts who
pointed me in the right direction, I was able to make a configuration
change that seems to have solved the base64 encoding problem.
I think we've now restored all the pre-update functionality.
John
On 09/17/2014 12:58 PM,
Here's a link to a USNO paper that measured the tempco of three GPS
amplifiers: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA490830
They found that amplifier filtering was the prime cause of tempco, and
the narrowest bandpass amplifier they looked at had a group delay range
of 4 nanoseconds
On the unit I bought from fluke.l, with a Samsung label, there are two
serial ports. The bottom one is the control port and is definitely
RS-232. The top port has only three wires (TXD, RXD, SG) and I think is
used for some sort of monitoring.
I've been using Ulrich's z38xx software to
a copy. It is strictly forbidden to copy it or use it for any
purpose or disclose its contents to any third party. Thank you.
On Oct 14, 2012, at 8:23 AM, John Ackermann N8UR j...@febo.com wrote:
On the unit I bought from fluke.l, with a Samsung label, there are two serial
ports. The bottom one
Hi Edgardo --
One slightly frustrating thing about the 5065A is that its frequency
settability isn't as good as its short term stability. I believe the manual
says that the small divisions on the C-field counter dial are 2x10e12, and it's
hard to set closer than that.
A good 5065A is a
Does anyone have a copy of the 5061B ops manual that does not have pages
3-7 and 3-8 missing? The copy at the Agilent site doesn't have those,
and they are the basic start-up instructions.
I am guessing that the steps are not much different than those in the
5061A manual (which I have), but
-boun...@febo.com] On
Behalf Of John Ackermann N8UR
Sent: Saturday, October 27, 2012 09:06
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] 5061B ops manual without missing pages?
Does anyone have a copy of the 5061B ops manual that does not have pages
3-7 and 3-8 missing
Since I recently got an HP Cs degausser (thanks, Stijn!), I though I'd
go through the whole setup routine for my 5061B/004 and see how close
the C-field-via-Zeeman setting would bring me to GPS-derived frequency.
It turned out to be an interesting and puzzling exercise.
This 5061 seems to be
Thanks to all for the helpful replies.
At this point, I believe what happened is that the degausser isn't
working properly and that may have resulted in the tube being more
magnetized rather than less; no matter what I do, I am now getting lock
at about -5e11 -- which is not what it used to
Hi Magnus -- I was recently (within the last year) able to get the battery pack
in my 5P power supply rebuilt by the local Batteries Plus store. It took a few
weeks for them to order and obtain the cells, but they do seem to be available.
John
On Nov 1, 2012, at 4:51 PM, Magnus Danielson
Hello Edgardo --
The T2-Mini uses a wide-range input circuit based on one that Wenzel published
with some modifications. It works with a square wave input (I've done some
limited testing) but I can't verify whether the input amplitude range will
extend as far on either the low or the high
or disclose its contents to any third party. Thank you.
On Nov 13, 2012, at 8:21 PM, John Ackermann N8UR j...@febo.com wrote:
Hello Edgardo --
The T2-Mini uses a wide-range input circuit based on one that Wenzel published
with some modifications. It works with a square wave input (I've done some
From what's been reported here, the mechanism isn't consumption of the
Rb, but rather deposition of material on inside of the bulb, reducing
its intensity, and that can sometimes be reversed by tricks that some
time-nuts have reported -- it's more of a maintenance rather than a
wear-out issue.
Edgardo, the minimum sample rate in practice is determined by the noise floor
of the measurement system. I would suggest that you do a baseline test by
measuring the counter reference against itself with a tau0 (sample rate) of 1
second. You'll see a best-case result and from it you can
Corby and Bert --
Count me in!
John
On Nov 19, 2012, at 3:15 PM, cdel...@juno.com wrote:
As Bert mentioned once the amount if interest is established purchase
details will post.
We also will post a FAQ for this project.
Thanks,
Corby
.
On Nov 14, 2012, at 8:13 PM, John Ackermann N8UR j...@febo.com wrote:
Edgardo, the minimum sample rate in practice is determined by the noise
floor of the measurement system. I would suggest that you do a baseline
test by measuring the counter reference against itself with a tau0
A couple of weeks ago I posted about problems with my HP 10638A
degausser (that's used with the 5061 Cs units to remove residual
magnetism from the high-performance option tube).
My troubleshooting indicated that the problem was likely in the op-amp
that is used to generate an exponentially
At a recent hamfest, I picked up an interesting looking Efratom Made in
Germany MFS modular frequency standard system. It's basically a GPS
disciplined FRK Rubidium with XO fail-over and a whole bunch of RF and
PPS outputs, in a *very* heavy box.
I've had a chance to play with it a bit and
not to interchange the modules between the two
systems. There may be some value in reviewing the MFTS manual to see if
there's anything applicable to the MFS.
Ed
On 11/25/2012 10:15 AM, John Ackermann N8UR wrote:
At a recent hamfest, I picked up an interesting looking Efratom Made
in Germany MFS
Sadly, no. Different number and it looks like pin-out as well.
On Nov 29, 2012, at 6:06 PM, Robert Atkinson robert8...@yahoo.co.uk wrote:
Is that ADO27B op-amp module on the PCB the same one used in the degausser
for the HP 5061 high performance tube?
Robert G8RPI.
In this case, you're not looking for the RTC but rather the clock that drives
the COU, which is what drives the system clock. On most systems, the RTC is
read only at startup and is not used once the system is running.
John
On Nov 30, 2012, at 6:30 PM, Eric Garner garn...@gmail.com wrote:
On Nov 30, 2012, at 7:10 PM, Sarah White kuze...@gmail.com wrote:
On 11/30/2012 6:30 PM, Eric Garner wrote:
the actual RTC on modern (Intel based) PC's is driven from a standard
32,768 Hz crystal attached to the PCH. some of them are in incredibly small
packages now instead of the old tuning
On Nov 30, 2012, at 7:42 PM, John Ackermann N8UR j...@febo.com wrote:
In this case, you're not looking for the RTC but rather the clock that drives
the COU
Read CPU. Stupid iPad keyboard.
___
time-nuts mailing list -- time-nuts@febo.com
On 12/6/2012 4:35 PM, Charles P. Steinmetz wrote:
From my perspective, the most interesting development would be an offer
by someone with a very well equipped lab to test any DIY GPSDO with a
consistent protocol and publish the results. That way, we could all see
how the various approaches
I don't have an internal search engine on the server, but most folks just do a
google search using the site:febo.com option and that seems to work well.
John
On Dec 8, 2012, at 11:24 AM, Mike Garvey r3m...@verizon.net wrote:
Is there a way to search the Archive?
I can find the archive,
On 12/10/2012 7:10 AM, David Kirkby wrote:
On 10 December 2012 09:24, David C. Partridge
david.partri...@perdrix.co.uk wrote:
Related to time-nuttery as astonomical observation was used for time-keeping
until C20.
Sir Patrick Moore, the great amateur astonomer died yesterday at the age of 89.
On Dec 11, 2012, at 6:57 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Tom,
On 12/12/2012 12:44 AM, Tom Van Baak wrote:
I think that the TBolt's schematic(s) are sort of HolyGrail for TimeNuts.
Some French time nuts told us they already have one. It's very nice.
Would you be
TimeLab can talk directly to the 512x boxes via ethernet. I've also
written some Linux scripts to capture both phase data and graphs from
the 5120; happy to share with anyone who'd like them (but TimeLab is a
whole lot easier in most cases).
John
On 12/20/2012 4:09 PM, Bob Camp wrote:
Hi
Magnus Danielson said the following on 12/20/2012 05:29 PM:
On 12/20/2012 10:19 PM, John Ackermann N8UR wrote:
TimeLab can talk directly to the 512x boxes via ethernet. I've also
written some Linux scripts to capture both phase data and graphs from
the 5120; happy to share with anyone who'd
And folks, please respect Brooks' privacy -- remember that this list is
archived in many places on the web.
John
paul swed said the following on 12/21/2012 04:06 PM:
Kind of defocusing here. I think the thread is about possibly helping to
release the shera v4.02 software. Several folks
The Clock-Block is a clock generator that is useful if you want to replace the
computer's onboard crystal clock with an external high-stability source. For
example, you can configure it to take a 10 MHz input from a GPSDO and create a
14.318182 MHz output to replace the crystal in a PC that
Hi Corby -- I've often thought of the idea of mixing two 5 MHz sources in a DBM
and using the resulting 10 MHz, so I'm really curious to see how this works
out. Seems like injection locking is the most likely problem you'd have to
deal with.
Let us know how this goes!
John
On Dec 28, 2012,
If there's interest and we can agree on a charter, I would be happy to
create a measuring-nuts (or similar) list at febo.com.
If so, I'd like the charter to be along the lines of high
signal-to-noise ratio discussion at the serious-amateur level of
scientific measurement tools and techniques,
And this (very interesting) thread brings up the question of measurement
methods. Some time ago I searched around and didn't find much on a
standard way to measure noise on low voltage DC supplies.
John
On 1/31/2013 11:36 AM, Bob Camp wrote:
Hi
I think the comparison of PSD on a power
John Miles' most excellent TimeLab software should be able to do what
you want: http://www.miles.io/TimeLab/beta.htm
John
On 2/25/2013 10:39 AM, Dan Rae wrote:
I am working on 400 - 500 MHz DDS clocks for an amateur radio project
and would like to record over gpib and plot the relative
Ulrich, I'm on the run right now, but I've done measurements of the HP 5087,
TADD-1, Spectracom 8140-series line amp, and a new protoype ULN buffer amp.
I'll post the links later today.
John
On Mar 14, 2013, at 6:59 AM, Ulrich Bangert df...@ulrich-bangert.de wrote:
Gentlemen,
although it
Jason, a few months ago I was able to build a FreeBSD 9 system using
standard NTP. It involved a lot of pain, a lot of help from PHK, and a
lot of handwaving, but in the end it worked. I'm happy to share config
info if you'd like -- contact me off list.
John
On 4/19/2013 9:50 AM,
Hi All --
Some of you know that I've been working on a very high performance
buffer amplifier in both a single channel version and a 6 channel
version that will replace the TADD-1, which TAPR discontinued because
the MAX477 op-amp is no longer available.
Unfortunately life and health and a
Hi Tim --
Welcome! The easiest way to search the time-nuts list is to use Google
and add the site:febo.com tag -- that will bring up hits in the list
archive (as well as anything on my web site that might be pertinent).
John
On 4/30/2013 1:49 PM, Tim Bastian wrote:
Hi all,
I'm a
Hi Tom --
Are you talking about capture time limits, or minimum tau? I've never
encountered any capture time limits in TimeLab and have done out to 30 days.
However, one thing I have noticed with the 5120A ethernet using my own
capture software is that the data flow will sometimes stop for
I'm not aware of any specific server issues here (the configuration is fairly
stock Debian with Mailman and Postfix) but there can be delays due to the
vagaries of the internet and there are interactions that can cause delays for
some folks and not others.
I'll keep an eye on things to see if
There was definitely a delay -- I saw it on my own message last evening.
I have done some performance tuning on the mail server that might (or
might not...) make a difference.
The new server we put on line back in January certainly has enough
horsepower, so hopefully tweaking is all it will
You could also consider whether Gnuradio (http://www.gnuradio.org) could
do what you need. It has interfaces to the Linux sound system.
John
Bob Camp said the following on 02/18/2010 08:10 PM:
Hi
Ok, A bit more info:
1) Quadrature PLL using an RPD-1 DBM and a home brew lock box.
2)
Sorry to all for the delay, but the results from the December Frequency
Measuring Test are available at
http://www.febo.com/pages/mvus-fmt/Dec2009/results.html
We congratulate WA4FJC, K5CM, AA6LK, K1GGI, and K9AYA for their first
place finishes (there were ties on three of the four bands).
I don't think I agree with that, Warren. I'd view a primary standard as
an intrinsic one -- that is accurate by definition and doesn't need
calibration against another, higher level, source.
A cesium beam standard is based on the same physical phenomenon that
defines the second, so if it's
Dave, the standoffs are threaded for a 4-40 screw, but I'll tell you a
secret -- if you use the nuts and washers on the BNC connectors, the
board is held very securely without any need for the mounting screws;
I've frankly never bothered with them.
John
Dave hartzell said the following
the board
in, and screwed in.
I'm probably going to be operating open lid for a while just to see the
LED status.
Dave
On Sat, Mar 13, 2010 at 10:29 AM, John Ackermann N8UR j...@febo.com wrote:
Dave, the standoffs are threaded for a 4-40 screw, but I'll tell you a
secret -- if you use the nuts
I'd love to see the results of some well designed and controlled jitter
measurements. I did a bunch on the TADD-2 and a single-channel
prototype, but they weren't as rigorous as this group deserves. (The
short version is that the tests pretty consistently show jitter standard
deviation of
For what it's worth, Corby, I've only ever seen or heard about that
sticker on 10811s that were in HP Cs or RB standards -- I think that
both my newer 5061A and 5065A have them. I have wondered whether maybe
that upgrade was for compatibility with the div2 board used in the
standards to get
Tom Holmes, N8ZM wrote:
Luis...
My wife is a great bargain hunter, and loves to come home and tell me how
much money she has saved on something she just bought. I've been trying to
get her to express the savings in dB$, but she just isn't going for it. Any
mention of the word logarithm sends
I just took a look at the datasheets for the 5115, 5120, and 5125. .
The 5115 is the base model covering through 30 MHz and without a
cross-correlation capability. At 10 MHz input frequency, its spec is
-133 dBc/Hz at 1 Hz offset, and -147 dBc/Hz at 100 Hz offset (not
spec'd at greater
Stop by the TAPR booth! I'll be there most of the time (when I'm not
out snooping around in the flea market).
John
normn3...@stny.rr.com said the following on 05/12/2010 06:08 PM:
Who is headed to Dayton??
Any vendors with junk?
cu there! 73 de Norm n3ykf
Sorry for the broadcast, but I wanted to get an update out to the users
of febo.com email services (including the various mailing lists hosted
here).
The good news is that my upcoming move from Ohio to Georgia shouldn't
disturb mail handling through febo.com.
The other good news is that
I'm going to exercise the administrator's prerogative and ask if someone
here who knows about IP network design would be willing to contact me
***off list*** at j...@febo.com and provide a bit of consultation --
possibly via a quick phone call.
We've now moved into our new house/lab and I
All -- I've had an overwhelming response to my plea for advice. Thanks,
but no more need.
John
John Ackermann N8UR said the following on 07/23/2010 07:25 PM:
I'm going to exercise the administrator's prerogative and ask if someone
here who knows about IP network design would be willing
Here's data showing Doppler (and other effects) on WWV as received in
Dayton, OH over several days. I took this by reading an HP 3586C
frequency counter output via GPIB -- which seems to be a good technique
for long-term HF frequency gathering. You need to figure out a way to
remove outliers
Didier Juges wrote:
I like the 3586 a lot, it's amazing what you can do with it. However, if you
send the audio (beat note) to a computer or other instrument, keep in mind that
the BFOs are not phase locked to the reference, they are just free standing
crystal oscillators, and they may be off
Steve, I'm sure there are several folks here with web sites or download
areas that could host the files. If no one else raises their hand, I
could put them on febo.com.
John
Steve Rooke said the following on 08/15/2010 10:53 AM:
Stanley and Nigel,
I have received the go ahead to
Re PIC programming -- if the volume is sufficient, Digi-Key will program
PICs. The set-up fee is enough that you probably want to do at least
50-100 units to amortize the cost, but it's not too bad. That's how we
handled the PIC for the TADD-2.
John
Heathkid wrote:
Stanley,
I'm not
Every now and then I get a request asking that I remove a post from the
time-nuts list archive because it was either meant for to an individual
rather than the list, or it inadvertently included personal information.
There is no easy way for me to remove a message from the archives; doing
so
bJason Rabel said the following on 10/15/2010 03:00 PM:
Why bother buying a cert? Just create a self-signed one (and you can make it
for like 10+ years)... It's not like he's selling stuff
from his website...
And that's what the old cert was. I will create a new one as soon as I
get a
I've regenerated the SSL certificate for HTTPS at febo.com. The new
certificate should be good for ten years, as I intended (but failed to
accomplish) when I created the old one. It's still a self-signed cert,
so will throw a warning with your browser, but you can trust me and tell
the
, 2010, at 9:20 PM, John Ackermann N8UR wrote:
I've regenerated the SSL certificate for HTTPS at febo.com. The new
certificate should be good for ten years, as I intended (but failed to
accomplish) when I created the old one. It's still a self-signed cert, so
will throw a warning with your
The archives are at http://www.febo.com/pipermail/time-nuts/
I'm not sure why you're getting site safety warnings going there because
that's not an HTTPS (SSL) page, though the primary list management pages
are.
And regarding those warnings -- they are because I use a home-made
security
We've never had a hard-and-fast rule, but in general the community seems
OK with (a) non-dealers making occasional postings about TF related
items (i.e., excess or housecleaning items), and (b) commercial
sellers making *very* occasional postings about unusual items.
Periodic ads, or general
Here's the page I wrote years ago on the split-shield antenna:
http://www.febo.com/time-freq/wwvb/antenna/index.html
Unfortunately, I never took any photos and the antenna is now in pieces
after a couple of moves.
I've also had good luck using an active voltage probe antenna to receive
both
Hi Richard --
At the moment we're not taking orders as the demand has outstripped the
supply. If -- and there's not much likelihood of this -- we end up
having any available, we will first notify those who've already tried to
order but were put on hold, and if any are left after that, there will
There've been some interesting conversations about useful TF hardware
gadgets lately. I'm personally very interested in the 10 MHz divider
project (as I've been working, very slowly, on a similar project with
several people on the list) and the Tbolt monitor projects.
Let me mention, then,
It's been a year or so since I shopped for any, but eBay yielded quite a
few for me, searching on rack ears.
John
J. L. Trantham said the following on 07/21/2008 07:19 AM:
I, too, have been looking for rack mount ears for similar units (5334B,
3325A, 3335A, 8657A, 5087A, 105B, 8130A,
David C. Partridge said the following on 07/25/2008 12:17 PM:
BTW Someone suggested that this might be relevant to TAPR. I'm very happy
to grant TAPR the free (no charge) use of the design, conditional only on my
retaining copyright.
TAPR's Time and Frequency Design Team (i.e., me) is
I'm measuring my pair of eBay -60158s right now and will post some
results probably after the weekend. I've never seen the -60268s.
One thing to note -- good phase noise and good ADEV don't necessarily go
together. Case in point is the -60158s are spec'd at 1x10e-12 at 1
second, which is better
I just put the results of some tests of 2 Time-Nuts Special
Thunderbolts, as well as 2 Z3801As, at
http://www.febo.com/pages/gpsdo_comparison/
I learned an interesting (and important) lesson in doing these
measurement. I initially measured the pairs of GPSDO against each other
(e.g., one TBolt
-term drift isn't being corrected at that
timescale. Your noise floor is a couple dB worse than the one I tested, but
they're otherwise about the same.
- john, KE5FX
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of John Ackermann N8UR
Sent: Saturday
Mark Sims wrote:
Well, I'm particularly fond of the MegaDonkey from mega-donkey.com It does
everything I want a microcontroller to do (it should, I designed it). Atmel
ATMEGA2561, 256K flash, 8K RAM, LCD 160x80 graphics touchscreen display,
two serial ports, IIC ports, A/D ports,
Yes, sadly this was a layout error that didn't get caught until too late
(I'm still not sure why the rules check in the board layout software
didn't catch it). Removing R4 if you're using DTR for power is the
correct answer.
John
Scott Mace wrote:
I found that on the two FatPPS units
You can pipe rsync over SSH; a lot of folks who (quite rightly) don't
permit telnet leave the SSH ports open, and it's a lot more secure for
your data, anyway. I don't recall the exact magic to make rsync plus
SSH work under Windows, but I think you could use PuTTY or Teraterm to
provide the
I was thinking about the Windows side; do the client/server there have
built-in SSH support? I thought you had to play tricks under that OS.
John
christopher hoover wrote:
John Ackermann N8UR [EMAIL PROTECTED] wrote:
You can pipe rsync over SSH;
I don't recall the exact magic to make rsync
Just testing after moving to the new server. Sorry for the bandwidth...
John
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Yes, we're now running on a dedicated server at ServerBeach, which is
also where tapr.org has been hosted for two or three years (and we've
had very good luck with them).
I'm not sure where your info came from, but ServerBeach (these days,
anyway) appears to be very reputable. They're owned by
of their
letting spammers slide but I did check the IP address of the list on
mxtoolbox.com and it came up perfectly clean.
Joe, WA9MSD
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of John Ackermann N8UR
Sent: Monday, October 13, 2008 08:30
Bruce, unfortunately Linux doesn't play too nicely with PPS -- long
story, but you need to do patches to get even minimal functionality with
current kernels.
An option is to use a shared memory driver called shmpps (available from
http://time.qnan.org/). I've done this in the past, but had a
I don't know (yet) what happened, but something broke in the last couple
of days and all the web interfaces (e.g., for subscribing, or reading
the archives) to the mailman mailing list system at febo.com are
currently broken.
The good news is that the problem is so pervasive, it must have a
I think I found the bug; somehow the web server and mailman processes
weren't able to write in each other's files, which caused various forms
of barfage. Don't know why it suddenly broke, though...
Sorry for the inconvenience.
John
___
time-nuts
a pair of Z3801s that perform some heroic jumps? This is just a
hobby, not long
baseline interferometry.
Bill Hawkins
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of John Ackermann N8UR
Sent: Sunday, February 03, 2008 7:18 PM
To: Discussion
Brad Stockdale wrote:
[ ... ]
Anyway, on to the reason for this post... I'd like to get some
receivers so I can HEAR and USE the WWVB, WWV, and WWVH signals... I
know that HEARING them may not be a 'normal' request, but I just
would like to monitor the audio as well as being able to
You can ignore the security notice; it is simply saying that the SSL
certificate we use is self-signed and not bought for $$$ from Verisign
or someone like that.
73,
John N8UR
Pierre-François (f5bqp_pfm) wrote:
Hi,
I really have a problem to access your site to modify my parameters.
Dan Rae said the following on 12/13/2008 02:16 PM:
Dave, the problem with those, and indeed the TAPR kit eventually, is
that all the Maxim ICs involved have been discontinued, and are no
longer easily sourced.
The MAX477 is indeed going away, but it appears to still be available
without
Magnus Danielson wrote:
My intent is to get some stuff done in the lab during the vacation.
(Desperatly trying to get some more on-topic discussions going).
Here are two questions that have been running around my head:
1. Following on from the discussion last week about trying to
Magnus Danielson wrote:
This diffrential locking technique could be applied to atomic standards,
but then naturally require much improved solution than simple
oscillators. The diffrential locking technique does not magically solve
issues that is typically common mode, such as temperature
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase shifter design covering
180+ degrees that doesn't
I don't see any alarm LEDs on my Spectracom WWVB receivers (one a
WWVB-DO, the other a clock), but I'm not sure that their unlock LEDs
latch, or that the error LEDs trip on loss of lock.
John
Greg Burnett said the following on 12/26/2008 02:50 PM:
Have any of you noticed intermittent WWVB
Unlock alarm is *not* latching.
Therefore you have to be there, to catch the problem in the act. ...Or
else run continuous plots.
Greg
- Original Message -
From: John Ackermann N8UR j...@febo.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent
Guys, this is totally off topic. Please drop it.
Thanks,
Your Sysadmin
Chuck Harris said the following on 12/29/2008 01:55 AM:
Jim Palfreyman wrote:
I suppose it's nuts is it to want to live in a society where there a very
few guns available, where ordinary people don't carry them and
Magnus, you read my mind! I'm planning to record 7335 on one channel,
and 7850 on the other. The only problem is that my wire antenna blew
down in the last wind storm, so I only have a vertical and I'm not sure
how that will work.
John
Magnus Danielson said the following on 12/31/2008
Someone in New York, Washington, or a Canadian provincial capital
looking to become famous? If so, please respond directly to Dagna.
They are looking for someone who can come into the studio.
John
Original Message
Subject:Morning show seeking time nut
Date: Wed, 31
Was I the only one monitoring CHU?
Things didn't go as I expected. It had been a few months since I had
monitored 7335, so was surprised when in mid-afternoon a broadcaster (I
think WHRI in Maine) was on frequency and totally obliterating CHU.
I was more surprised when CHU was audible on the
I recently acquired a couple of FTS 4100/S12 cesium frequency standard
modules. These are, I've been told, basically the guts of a 4050 (and
maybe 4060?) commercial standard repackaged for military fly-away use.
They run from 22-30 volts and have a couple of switches and a meter
jack, but
Dan Rae wrote:
Richard W. Solomon wrote:
The GPSDO I want to use has an output rich in harmonics. In some
cases that is good, but Murphy rules and in the application I have
today, it is not good.
I need a 10 MHz Band-Pass Filter, Bandwidth is not critical, something
small with SMA
I mentioned in another post that I picked up a couple of militarized
FTS-4100 fly-away Cs units. These have an option installed that adds
an accelerometer to the OCXO; it's supposed to reduce G sensitivity by
at least an order of magnitude.
John
saidj...@aol.com wrote:
Hi Magnus,
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