I think I may need to change the LPF feeding the EFC in my GPSDO to get rid of
dithering jitter. Is there any point in adding a resistor and cap in the EFC
line, or do I need to go back and change the values in the op-amp circuit
feeding it? Currently an op-amp directly feeds the EFC pin. I
Mark,
What type of real-time surveying software are you using? I'm looking for
surveying/plotting software for Linux to keep a close on the timing stability
of my Adafruit.
Bob - AE6RV
From: Mark Sims hol...@hotmail.com
To: time-nuts@febo.com
From: Charles Steinmetz csteinm...@yandex.com
It is common to use an additional, external series resistor and shunt
capacitor, generally 10-50k and anywhere from 0.01uF to tens or even
hundreds of uF, depending on the application. Of course, this
additional pole needs to be taken into account
Thanks Bob,
I have a spare oscillator, so it's a simple deal to put a meter on it, now that
I know what to look for.
Bob
From: Bob Camp li...@rtty.us
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Thursday, November 7,
Hi Mark,
What I was hoping for was some canned software that will plot position on the
display until told to clear it so I can get a visual. I've tried foxtrotgps,
but it clears its screen at any and every opportunity, so barring getting into
the code that's not going to work. But I can
From: Chris Albertson albertson.ch...@gmail.com
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Saturday, November 9, 2013 11:08 AM
Subject: Re: [time-nuts] Computing GPS Distance Error in Time
If you
From: John C. Westmoreland, P.E. j...@westmorelandengineering.com
To: Bob Stewart b...@evoria.net, Discussion of precise time and
frequency measurement time-nuts@febo.com
Subject: Re: [time-nuts] Trimble 34310-T EFC Question
Message-ID:
CAFtYB4wY0QEFwc4G2E=f5fknp85eofxijmamvx8ir
Good job! I've read other good experiences about the Beiming. I finally wound
up buying a Prologix Ethernet adapter. Let this be a warning to anyone who is
tempted to buy the 82357B clone with the gold-anodized aluminum case. Do Not
Do It!
Bob
From:
...@non-stop.com.au
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Monday, November 11, 2013 4:33 PM
Subject: RE: [time-nuts] linux-gpib working on a RasPI
Hi Bob, what is so wrong with the Anodised version?
--mark
-Original
I've got a question for you Hal. We can take it offline if it's more than a
response or two. I opened two sockets to the adapter in one program and found
the same socket id. OK, that tells me that I have to address each device
before sending commands to it, rather than having a separate
just a thing to solder-up on a weekend
Never underestimate the attraction of something you can solder-up on a
weekend. It kept Heathkit alive for years. But if you're trying to make
money from it, the problem is finding a market and marketable ideas.
Bob
John says:
However I would most humbly point out that the cost of software is not
zero if the time-nutter places any value on his or her time.
Might I point out that the needs and goals of the hobbyist and the professional
are often at odds? The professional needs a solution. The hobbyist
This discussion is all very nice, but what possible relationship does it have
to time-nuts?
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and follow the instructions there.
Quartz crystals. Let's just say that it morphed from a discussion into a
meta-discussion. :-)
Let's just say that it's morphed from something relevant into a political
argument and drop it, shall we?
Bob
___
time-nuts mailing list --
Here is a snippet of code from a program in C I have running on Linux.
Notice that I had to set both the input and output baud rates. After looking
around on the web, it seems to be a matter of whether the hardware will support
split baud rate. So, essentially, code it and try it.
I got a GPS Source splitter recently and since my little Adafruit doesn't have
enough power to run it I got an MS3016R connector to hook up external power.
What I can't figure out is what is that blue plastic pin for that comes in the
package?
Bob - AE6RV
relief/enviro shield, but I dunno what.
Bob
From: J. Forster j...@quikus.com
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Monday, December 9, 2013 8:33 PM
Subject: Re: [time-nuts] MS3106R10SL
OK, now it makes sense!
thanks!
Bob
From: J. Forster j...@quikus.com
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Monday, December 9, 2013 8:58 PM
Subject: Re: [time-nuts] MS3106R10SL-4S
Thanks Robert. So, am I right in thinking that you insert the small end from
the connector side of the rubber grommet and pull it through until the thick
part just touches the narrowed place in the grommet? They have it sized to
imply that. Are there any assembly documents on the net that
There is digital astronomy specific out there that will overlay/digitally add
multiple images, do filtering, enhance contrast, etc. It's just something I've
read about at this point. I haven't used it and couldn't point you to specific
software.
From:
Tom,
Do you know of any other PIC projects that get a greater resolution? I was
thinking of doing something with a dsPIC33 running at 140MHz or greater, but
I'm not sure I want to devote the time to if it's it's been done.
Bob
From: Tom Van Baak (lab)
Hi Azelio,
One of the internal timers is exactly what I was thinking of. I haven't gotten
into this yet, but it looks like the dsPIC33 can accept a high quality
reference clock as an input, and then use a multiplier to get it up above
100MHz. I think 200MHz is the limit in some packages. My
Today's SouthGateARC.org page has a link to Tom's talk at the 2013 TAPR/ARRL
Digital Communications Conference. I don't know whether this has been linked
to time nuts in the past, but it's an enjoyable presentation.
I put a divider network in the EFC line of my GPSDO to restrict the OCXO range
to 2Hz. Now I'm seeing heat-related drift that wasn't apparent before. I put
a 20K resistor from the same strip on my 3456A, and the warmth of holding it
between fingers moves it by about 50 ohms. What type of
Hi Nigel,
I didn't give any thought to thermal issues when I bought the resistors.
They're just standard carbon composition. I see some metal film resistors with
a temp coefficient of 5 PPM/C, so I'll get some of those and put them in.
thanks,
Bob
for the pot.
http://www.evoria.net/AE6RV/GPSstd_PLL/EFC%20Divider/EFC2.png
Bob
From: Robert LaJeunesse rlajeune...@sbcglobal.net
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Friday, January 31, 2014
.png
Bob
From: Robert LaJeunesse rlajeune...@sbcglobal.net
To: Bob Stewart b...@evoria.net; Discussion of precise time and
frequency measurement time-nuts@febo.com
Sent: Friday, January 31, 2014 11:40 AM
Subject: Re: [time-nuts] EFC divider resistors
Hi Volker,
Thanks for the ideas. The resistors are all within a short radius of each
other. I hadn't thought about bundling them all together. I suppose I could
epoxy them together as a last resort. I've got some EPF foam, so I could try
putting that on the board right against them. In
As to what the specs are on this oscillator, I couldn't say. I have two of
them. The one in my GPSDO wants about 2.101V for 10MHz. The other one wants
about 2.6V (from memory). So that pretty much limits my options to a divider
and a summing device to bring the EFC back up for the
Hi Bob,
Do you think that maybe the oven current difference when the temperature
changes could be at the root of this? To me, it seems like this started when I
put the divider in. Before that, drift might have been hidden due to the lower
resolution, I suppose. In any case, Mouser has my
Around $25.00 to reproduce the final result. The cost goal for me to make it
work is considerably more elastic. It's a project that I'm having fun with.
There is no commercial market.
From: ewkeh...@aol.com ewkeh...@aol.com
To: time-nuts@febo.com
Sent:
Any idea what the usual temperature coefficient is for the VRef output of the
OCXO? I looked under the Trimble label of my spare and found: DOC2127 and
44/1416. The one I have installed is probably the same.
From: Bob Camp li...@rtty.us
To: Bob Stewart b
Hi Tom,
Actually, no-one has. And come to think of it, maybe that's the root of the
problem. I have the resistors lying on their sides right under the OCXO on the
opposite side (bottom) of the PC board. Any air circulation is going to make
them weave and wobble a bit in value. I'll have to
You can also take the tip out of a soldering gun and apply the gun's two posts
directly to the can for resistance heating. I've used that method a time or
two on large items. You need to push firmly to get good contact. The voltage
is very low.
Bob
Subject says it all. Does anyone have a script I could use as a starting point
to calculate/plot the ADEV for my GPSDO?
Bob - AE6RV
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something about an ADEV and how
it applies to my GPSDO.
Bob
From: Azelio Boriani azelio.bori...@screen.it
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Sunday, February 2, 2014 6:24 PM
Hi Hendrik,
My house is on a slab of concrete, so about 8 hours ago, I moved it from the
top of the HP stack to the floor. The net phase error for the past 7 hours is
about 180 degrees with no change to the DAC value. So, I think it's found a
stable home. I'll put the low temp coeff
That code, like most ADEV calculations, assumes you have phase data...
In my case, the phase data wraps at each DAC change. Do I need to unwrap it,
or change it to delta values? I haven't read enough about ADEV to get a feel
of what I want, or what this group means when someone say ADEV of
I think I have the unwrapping and scaling sorted out, so here's the result for
1PPS vs 10MHz for my GPSDO, as measured by a 5334B clocked by the same 10MHz.
I don't know how to read these, but 6,3,1,6,3,1 etc. doesn't look normal. I
wonder if that merely reflects the consumer grade GPS
Hi Charles,
I've had a night to digest what I'm seeing, and this is what I've come up with:
There were only 2 updates to the DAC during the 24 hours tested. So, long term
doesn't system drift dominate? That would include thermal drift and the
stability of the OCXO. Also, there was a phase
I'm getting a little more familiar with ADEV and OADEV now. With a little help
from Tom, I've put together gnuplot scripts and his software to get a decent
plot. But, as some time-nuts have pointed out, my measurements are of one part
of my system being compared to another. Would I learn
method I mentioned.
/tvb
- Original Message -
From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Thursday, February 06, 2014 2:23 PM
Subject: [time-nuts] Rb as source for ADEV?
I'm getting a little more familiar with ADEV
Thanks for the correction. Averaging Time, τ, tau it is.
Bob
From: Tom Van Baak t...@leapsecond.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Thursday, February 6, 2014 9:31 PM
Subject: Re: [time-nuts] Rb as source
I think I see the problem. I was wondering about using the 1PPS output from my
Rb in a test. Cobbling all that together would be a quick bit of work for you,
but I spent my life in IT. I'm good with a soldering iron, but I readily admit
my shortcomings at hardware tinkering.
Bob
is going to be key to
all of them.
Bob - AE6RV
From: Hal Murray hmur...@megapathdsl.net
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Cc: hmur...@megapathdsl.net
Sent: Saturday, February 8, 2014 10
and
relays packets to the clients. Prologix hadn't written one when they
commented here last summer.
Bob
From: Orin Eman orin.e...@gmail.com
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent
Could this be a case of the Rb settling on the bottom of the bulb and then
being vaporized when the bottom became the top?
Bob
From: Jamieson (Jim) Rowe jimr...@optusnet.com.au
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent:
Hi Jim,
I posted that mainly because there have been past threads about reviving Rb
standards by heating the bulb, not because I have any evidence that that's the
problem.
Bob - AE6RV
From: Jamieson (Jim) Rowe jimr...@optusnet.com.au
To: Discussion of
I was waiting for someone else to mention this. The problem with the sawtooth
from a UT+ and similar is that it can go long periods with the phase on one
side of zero, switch to going back and forth across zero, and then even start
at one side, and do a sawtooth shaped stairstep ramp to the
Tom tried to steer me to the PICTIC recently, and I sort of brushed him off,
because, quite frankly I didn't understand. Now that I've really looked at it,
it's a much better idea than using a dsPIC33 and brute-forcing it. But, I
don't really need everything the PICTIC offers so I started
Hi Lars,
I'm lucky in that I'm starting with a PIC running internally at 40MHz. So I
think timing is not going to be a real problem. But after getting a response
from Richard, I'm concerned about flaws in the spice chip models. I'm also a
bit concerned about breadboarding, but come to think
.
/tvb
- Original Message -
From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Saturday, February 15, 2014 5:19 PM
Subject: Re: [time-nuts] TIC model
Hi Lars,
I'm lucky in that I'm starting with a PIC running internally
The smart guys have already contributed to this thread. What I have is an
example taken when I was doing some testing. The plot at the top is the DAC on
my GDPSO. It is moving the oscillator back and forth about 4.6E-4 Hz. Not a
lot.
The bottom plot is the interesting one, as it is the
Hi Bruce,
What are the tradeoffs with using different values for R1? I have no practical
experience at this, so all I can do is rely on the models. Does the fact that
R2 is in the PIC, and C1 is so tiny, make the value of R1 of less importance?
On my PIC, they list C1 as 5pf, R2 as
Now you've lost me. What 2.5 MHz synchronizer clock? Everything I have
external to the PIC is 10MHz. The PIC is running HSPLL at 40MHz, though I
don't think that makes any difference to this.
Bob
From: Bruce Griffiths bruce.griffi...@xtra.co.nz
To: Bob
Surround your house with a complete loop of #6 wire with 8-10 ft long ground
rods every 10-12 ft (but no less than 6ft), bonded (clamped) to the ground at
the service entrance. That's the simple answer. The somewhat longer answer is
in a recent copy of the ARRL Handbook. Some will argue for
Hi Dave,
Speaking only for myself, most of the fun is in the reinventing of the wheel.
I have no real use for a frequency standard, but designing and building my
GPSDO has been very rewarding. Eventually I hope to be able to share it with
someone besides Dan, who has been a big help on the
For Linux, I worked this up and posted to linuxquestions.org. I don't
guarantee it, but it's been working for the PL-2303 devices for me. It just
creates a link to the real driver. There are probably better ways to do it.
File: /etc/udev/rules.d/70-persistent-usb.rulesACTION==add,
Hi,
I suggest that you use a DVM to see which ports are getting power. Better yet
would be to disconnect everything and use an ohm-meter to see which ports are
electrically connected. If you can't satisfy yourself that you know what's
what, then contact GPS Source. They are very good people
I've just won a Symmetricom / Datum PRS45A PRS45-0001K - Single Cesium PRS-45
DS1 on ebay from a guy in the Netherlands. It's listed as used in good
working condition, so ebay should protect me if it's not. Hopefully he has the
training to get it to me.
It seems to also be known as a
that it uses redundant external power sources. I take
that to mean that I can safely supply only one side and be fine?
Bob
From: Poul-Henning Kamp p...@phk.freebsd.dk
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Monday
Subject: Re: [time-nuts] PRS-45 Cs Standard
Hi Bob,
On 12/01/2014 05:54 PM, Bob Stewart wrote:
I've just won a Symmetricom / Datum PRS45A PRS45-0001K - Single Cesium
PRS-45 DS1 on ebay from a guy in the Netherlands. It's listed as used in
good working condition, so ebay should protect me
Hi Graham,
There was a post, I think by Anthony, that discussed the USB adaptors. But
your pinout looks different than the adapter I got. You have pin 1 listed as
TX (-) whereas on mine pin 1 is TX (+). Likewise, you list pin 2 as TX(+)
where mine is TX (-). In any case, here is the wiring
Look at Bob Camp's post. Yahoo mail made a hash out of my formatting.
Bob
From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Monday, December 1, 2014 8:17 PM
Subject: Re: [time-nuts] Lucent KS-24361 RS-422 interface
Hi Magnus,
It came in today. Looks good from the outside. No obviously bad smells, but I
can't power it up, as my PSU hasn't come in yet.
There is a paper Datum tag dated 6/2/03 on the outside. Looking through the
vent holes, I can see a Datum Cesium Beam Tube assembly Model Number
PM, Bob Stewart wrote:
Hi Magnus,
It came in today. Looks good from the outside. No obviously bad smells, but
I can't power it up, as my PSU hasn't come in yet.
There is a paper Datum tag dated 6/2/03 on the outside. Looking through the
vent holes, I can see a Datum Cesium Beam Tube
Hi Bob,
It's pretty much clean. There is a Datum is now Symmetricom decal, as well
as a Symmetricom decal. There is a round paper sticker that says Datum TTM
with a date and probably someone's initials. And what looks like a small paper
sticker on the back that was removed. There was also a
Hi Paul,
This puzzled me, too. Finally, I just deleted the txt file. Looking at, it,
it looks like maybe it's a weekly file. For example: Z38XXData2014CW50.Txt,
seems to mean week 50. At least that's my guess, since there's also a file
Z38XXData2014CW49.Txt that was last modified Sun 07 Dec
Well, it's alive, and I even have 10MHz coming from it. It took about 16
minutes to go to lock. Is that good, or doesn't matter? Now I've got to put
together a serial cable and see if I can talk to it and find out how it thinks
it's doing. But, this is good!
a latching relay in the power stream to keep it off
if I lose power? The budget is now officially busted, and a UPS is not going
to happen for awhile. Santa's sleigh is now officially out of gas.
Bob
From: Pete Lancashire p...@petelancashire.com
To: Bob Stewart b...@evoria.net; Discussion
Hi Bob,
I can't speak for Dan, but since he hasn't responded, I can speak a bit about
the issue. As you know, my GPSDO uses a constant voltage TIC and the PWM
output from a dsPIC33 to perform the DAC function. During testing we've found
that one critical point is that the PWM voltage from the
Hi Bert,
Thanks for the comments. I did learn today that this was a recent pull, so
that explains why it came up well. I hope you'll understand my reluctance to
start making adapters and doing direct measurements on the thing. One of my
next steps is to get it to talk to me. Unfortunately,
good idea and prudent. Besides
while it is reacquiring lock you would probably be busy resetting VCR's and
so forth.
BillWB6BNQ
Bob Stewart wrote:
Hi Pete,
I don't have any way of knowing. I've asked the seller if he has a copy
of the control software, and I don't like to go back
Thanks Paul. It does seem too good to be true, and it certainly came at the
right time in my GPSDO development effort.
Bob
From: paul swed paulsw...@gmail.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Tuesday, December 9, 2014 8:04 AM
Subject:
Subject changed, as I inadvertently stole Dan's thread.
Hi Bob Camp,
You wrote: Looks perfectly normal to me. Your Cs is sensitive to magnetic
field. Have you “zeroed” it out? No of course not, nobody does. (almost nobody
…).
What does it mean to zero out the magnetic field for a Cs? Sounds
noise.
Bob
From: ed breya e...@telight.com
To: time-nuts@febo.com
Sent: Tuesday, December 9, 2014 3:30 PM
Subject: Re: [time-nuts] Linear voltage regulator hints...
I'd recommend going with what Bob Stewart mentioned, using separate
gates as buffers, operated from a better-grade
to worry?
Bob
From: Bob Camp kb...@n1k.org
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Tuesday, December 9, 2014 6:11 PM
Subject: Re: [time-nuts] PRS-45A
Hi
Somewhere in / on the beast there should be a magnetic field
I've been uncomfortable with this KS since I got it; even having to return the
REF-0 unit for comms problems. Now that I have the PRS45A, I think I've proved
that the KS does have a problem. Has anyone else had something like this plot
shows? Any idea what's causing it? I'm not seeing
Hi Charles,
These hiccoughs match the ones I was getting comparing the KS to my homegrown
GSPDO, so I don't think there's any chance it's the PRS45A. I was wondering if
it might be the antenna. My homegrown unit uses the same antenna via a GPS
Source MS-14 splitter, but the LEA-6T in my
input on Channel A
and the following input on Channel B. I don't think it would change anything
to arm from the KS.
Bob
From: Adrian rfn...@arcor.de
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Wednesday, December 10, 2014
Charles, I have what I have. No, I do not have a 360 degree view of the sky,
and that's not likely to change for some time. I have the southerly 180
degrees from about 20 degrees elevation and up. I bought this KS as an example
reference for my homegrown. It may be that it's just not up to
The issue for me is that if it couldn't get a good timing solution, why did if
fail quietly? I would expect it to at least go into holdover and turn on an
alarm or something. It was giving me fits at least 4 times a day, so I should
have some idea whether using a different port on the
the attic antenna as
a test.
Bob
From: Bob Camp kb...@n1k.org
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Wednesday, December 10, 2014 5:04 PM
Subject: Re: [time-nuts] KS problem
Hi
Have you dumped the log file
Well, it just headed south again. I don't see anything on the status screen,
captured below, but that may just be me. I also captured the normal PPS TI
EFC screen. (Both from Z38XX.exe) The EFC screen just looks ugly to me. You
can see where it went south over on the right with the sudden
Sorry about that. Hopefully this separates the two links. I'm going to have
to ask John what's causing this.
http://evoria.net/AE6RV/KS/KS.Screen.png
break
http://evoria.net/AE6RV/KS/KS.Status.png
From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency
it another test when that happens.
Right now I've got a new board to design with improvements Dan and I have made
on the prototype.
Thanks for everyone's help and suggestions. I'll let it alone for awhile.
Bob
From: Bob Camp kb...@n1k.org
To: Bob Stewart b...@evoria.net; Discussion of precise
Hi Charles,
I hope you don't mind if I throw my two cents in, as this began as a question
about my GPSDO project. We had a thermal drift problem that Dan traced to the
PWM to EFC interface and resolved. The question to the list was whether there
was a regulator package that had a built-in
Charles Steinmetz posted a link to Wenzel Squaring circuits in Li Ang's thread,
and I'm particularly interested in the line receiver method. On the wenzel.com
page the line receiver was an SN55182. In Bert Zauhar's GPS Standard, he used
an LTC-1485 for the OCXO input. Is there something in
Does your oscillator have a VRef output? If so, use that instead of a
regulator. It's cleaner and usually temperature compensated.
Bob
From: ct1dmk ct1...@gmail.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Tuesday, January 6, 2015 6:40 PM
John,
If that's a TimeCesium device, then the Monitor3.exe program from Symmetricom
should work. I have a copy on my domain at
www.evoria.net/PRS45A/Monitor3.zip
Bob - AE6RV
From: John Fullington f...@fullnet.com
To: time-nuts@febo.com
Sent: Friday, February 13, 2015 1:14 PM
On 1/7/2015 1:09 AM, Bob Stewart wrote:
Does your oscillator have a VRef output? If so, use that instead of a
regulator. It's cleaner and usually temperature compensated.
Bob
From: ct1dmkct1...@gmail.com
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Hi Stan,
Is there a green LED lit on the board near the power block, or are both red and
green very dim or not on at all? I have a unit with the same symptoms as
yours. Both output voltages are extremely low from the power block. Unless
the green LED is lit or flashing, I'd send it back.
Bob
Hi Cash,
Have you looked at the sourcecode for the gpsd package? packet.c would
probably be your starting point. The gpsd package parses pretty much every gps
receiver. I'm not sure if this is what you're looking for, or if you
specifically want something high-level.
Bob
From: Cash
Hi John,
Doesn't that have a NEO-6M in it rather than a timing receiver?
Bob
From: John Miles j...@miles.io
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Sent: Sunday, March 22, 2015 5:49 PM
Subject: Re: [time-nuts] Some observations of the BG7T BL
OK, that explains your comment. This is most likely a silicone based potting
compound. It's a bit softer than an eraser when cold. Very little of it was
actually stuck to the board or components. If it had been a hard, epoxy-based
covering, I wouldn't have bothered with it.
Bob
Art Sepin of Synergy Sys gifted me with a big pile of timing related junk for
Christmas, and out of the pile, I have around 20 UT+ receivers that seem to
work properly. So, I'd like to offer them to time-nuts who are in need of one.
Most have the right angle MCX antenna connector, but some of
My internet has been down all day, and now that it's back up, I see a bunch of
requests for receivers. They're all spoken for now, and in fact maybe a bit
over-subscribed. I'll contact each of you individually who responded offline.
Bob
___
time-nuts
@febo.com
Sent: Thursday, May 14, 2015 12:21 AM
Subject: Re: [time-nuts] New 5370A
Bob Stewart wrote:
... And kudos to John for Timelab. It doesn't play well with Wine in Linux,
but
that's not terribly surprising, all things considered.
Really? How so?
Wine tends to be a bit more pedantic
-nuts] New 5370A
Hi Bob,
On 05/14/2015 05:11 AM, Bob Stewart wrote:
I got a new 5370A, so of course I've been running a bunch of tests on it. In
the image linked below, the start channel is my PRS-45A, the stop channel is
my GPSDOe (e is for engine) and the ARM channel is fed by the PPS from
34310-T and see what happens when using that
as the reference.
Bob
From: Bob Camp kb...@n1k.org
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Thursday, May 14, 2015 6:06 AM
Subject: Re: [time-nuts] New 5370A
Hi
One
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