wrote:
> On Sun, 15 Mar 2015 11:05:53 -0400
> paul swed wrote:
>
> > I agree with Atilla from what I have seen. Its actually somewhat
> difficult
> > to measure this level of current.
>
> It's not that difficult. You just need a good DMM. Standard ones
> will not
Poul-Henning
They are interesting the 101 looks pretty nice. Considering the Euro is
just about a dollar today. $83 US. But then you see the shipping! OK time
to move on.
Regards
Paul
WB8TSL
On Wed, Mar 18, 2015 at 3:57 PM, Poul-Henning Kamp
wrote:
> There is a seller on the french eBay which ha
You should make an offer that way we all get to see the insides.
The movement seems to have value no matter what. You may indeed open up to
find the magical batteries have turned to white powder. Most clocks like
this either had internal or external battery sets.
Very nice indeed.
Regards
Paul
WB8T
pen it up whatever. I shall certainly take photos. I hope that it
> did not have internal nicads, as they will indeed be in a sad state after
> 30 years :(
>
>
> Tom Harris
>
> On 31 March 2015 at 01:31, paul swed wrote:
>
> > You should make an offer that way we al
Bob
Thanks for the pictures and clues. I have a bad lucent on a hp3801. It was
just 1 of the supplies so I adapted an alternate switcher and it works just
fine.
That said there is hope I can go back in and fix it and also if need be the
ones on the KS units I have. I have sensed there is a flake-y
Welcome to time-nuts and you are getting good advice.
As mentioned lmr400 is nice but not warranted. RG6 is the better coax as
far as loss goes. So consider that over 59. Price is pretty much the same.
But do pick up a good grade of either. Not something you may find at a
local store going out of b
I can add some insights to way-ward receivers that are missing the down
converters. You can indeed fabricate replacements or like I have done for
several units like Austrons adapted Odetics downcoverters in. This is not
at all easy you have to be time-nutty to do this. It takes reverse
engineering
Bob brings up all the additional details that are the reality of dealing
with teh older gear. Especially the date offsets because of the 1024 week
cycle. That is a real pain.
But the reason to spend time on something like this is to understand
something and to learn.
I picked up the austron 2000 gp
Quite a good thread.
The old rollover is a real pain in the Especially on the old receivers
circa 1990s.
Whats useful is the method for calculating the week mentioned. Granted
there are tools online that help. But the math associated with reversing
the date now is clearer using the Julian date
pix for anyone that wants to homebrew there own.
Regards
Paul
On Sat, May 9, 2015 at 10:25 AM, paul swed wrote:
> Hello to the group I would agree its coax. But also the n connector to the
> right can take DC in and power the splitter. So if your rcvr puts out
> 4.5-30V you are in busine
Hello to the group I would agree its coax. But also the n connector to the
right can take DC in and power the splitter. So if your rcvr puts out
4.5-30V you are in business. I say this from the internal pix you posted of
the unit. That was very helpful.
Regards
Paul
WB8TSL
On Sat, May 9, 2015 at 3
Iain
The 117 would have worked for msf at 60 KHz and lucky you to have
operational loran still.
MSF as far as I know is not using any bpsk signals and i think at the top
of the minute there was a carrier drop. Not off but a reduction. So that
can cause the 117 an issue in tracking. But yes I used t
Not sure there is much to say.
Its a very nice oven xtal oscillator and divider chain.
It has some nice features like slew for the 1pps and would guess it has
battery backup.
But the question becomes the value?
Depends on what you are trying to do.
There are numbers of GPS locked references for $12
Absolutely a good answer. You could mess with lots of things. But the fact
is they are pretty much a mess. You have to linearize and right size etc.
So why mess with a great answer?
Regards
Paul
WB8TSL
On Fri, May 29, 2015 at 10:09 AM, xaos wrote:
> Hello everyone,
>
> In the past there have bee
Yes you can clean them up its online and its pretty simple not that I
recall what it was. I had the same issue and in device manager essentially
the hanger ons are hidden devices once you tell device manager to show
hidden you will see the issue.
I do not recall if you right click and release or wh
Quite difficult to see. But it appears the gps antenna cable is just
hanging there not connected to what I presume would be a antenna.
Regards
Paul
WB8TSL
On Sun, May 31, 2015 at 4:47 PM, Bob Camp wrote:
> Hi
>
> If you look at the pictures you can see the oscillator they are using for
> the 10
As I remember
For rs422 receive plus to ground and rs232 to minus.
For rs422 xmit take the minus to the rs232 line.
This has to be a modern rs232 port that will work on 0-3V or greater.
As Hal says it works over 3-10 ft. May go further but it is a hack. the
price is right.
Regards
Paul
WB8TSL
On M
Dead tube is a huge issue.At least for most of us finding a replacement
tube is zero especially at a cost that is reasonable. I speculate that
given the age of all 5061s pretty much all the tubes should be in very bad
shape. They only had a life of 7 years and we are many years beyond that.
I have
Well this looks interesting. You can download what appears to be the same
bundle for a free 45 day trial. Doing that at the moment.
Then there is the NI-Visa download and it has gpib.
Not sure what much of this means in reality. What drivers do they have to
get to the old clasical fat GPIB used on
OK I can see I am in the same boat I always have been old HP gear as
mentioned above. Still I will install and tinker for some fun. I mean the
factthat you can interface to arduinos for control of bits and such could
be useful.
Will have to see.
Regards
Paul
WB8TSL
On Sat, Jun 20, 2015 at 6:03 PM,
I downloaded both the software and drivers. About 2GB in total.
Install was typical two restarts required and the eval copy is 7 days not
45.
but you can get a eval license extension.
It seems for each package so you have to re-step through the process
multiple times.
The NI explorer will look for
Bobs description is accurate. As an example we had a power hit last night.
My gps rcvr came up at some odd time. (normally its all fine in 10-30
seconds) I guessed the battery was bad its been 5 years. Sure enough
sometime later in hours the time is correct. Time to get a screw driver and
battery.
Have the eval license up and operating with the NI simple LED test. It
works.
I can easily see how you could use this to create a nice GUI for some sort
of control project.
Regards
Paul
WB8TSL
On Sun, Jun 21, 2015 at 6:09 PM, Jim Lux wrote:
> On 6/21/15 11:28 AM, Don Latham wrote:
>
>> Just for
Good job Arthur and it makes sense since the wwvb clock simply checks every
24 hours it would continue on the old time and GPS updates instantly.
Nicely done.
Regards
Paul
WB8TSL
On Wed, Jul 1, 2015 at 12:34 AM, Arthur Dent
wrote:
> Here is a short video of the leap second compared to a regular
Steve has it right. GPS/atomic time is always right and our earthly time
frame is always slowing down. Though as time passes it seems it speeds up.
Must be some relativistic effect but only for humans?
Your system would not show this issue until you compared it to our time
from say WWV. Thats why t
Matthias
I am afraid I am not much help here.
I did look at the a19/20 interpolators. A lot going on in that small space.
I guess i would check the 200 MHz feeding into it. The VCO is fairly simple
in using a gate and a delay line. I will guess the delay line is coax.
But there are all kinds of gat
m
> oscillating permanently.
>
> Anyone successfullly opened such a package (without damaging it
> permanently?)
>
> Regards,
>
> Matthias
>
>
> Am 05.07.2015 um 07:54 schrieb Bruce Griffiths:
>
>> On Saturday, July 04, 2015 05:20:45 PM paul swed wrote:
>&
So interesting they do circle around the same region. Pretty amazing.
Regards
Paul
WB8TSL
On Wed, Jul 8, 2015 at 1:39 PM, wrote:
> A few have volunteered for extended tests!
>
> Also got some info for a couple others:
>
> Unit 1 3.15X10-12/Year 12 years
> Unit 2 1.53X10-12/Year 13 Years
> Unit 3
As Mark says the tubes have a very finite life. So like him I turn mine on
as needed and every 6 months. My tube is on absolute fumes and is very very
marginal. But it still locks on its own in something like 16 hours with
almost impossible to see beam current.
So if you follow the every 6 months t
Nigel
I have a FS700 and would like a copy of the software.
I enjoyed the use of LORAN C when it existed and even in some of the test
runs.
The runs have been pretty quite or I have missed them.
But LORAN C made a really nice alternate to GPS and I tended to use it as
the absolute. I do here LORAN
They can be useful as a comparator between two references as long as you
have a LORAN C simulator to drive the system.
I built up a unit 3 years ago may still be in the time-nuts archives. It
was fairly simple to accomplish. I took the reference and drove the
simulator. Then the simulator feeds the
Magnus
I use a 420 ohm resistor to make FS700 happy. I have a LORAN C whip antenna
and preamp that then feeds a distribution amplifier for the 4 Loran C
rcvrs.
The loran C simulator lives in the same box and can feed the rcvrs also.
Regards
Paul
WB8TSL
On Sun, Jul 12, 2015 at 11:10 AM, Magnus Dani
Skip
It certainly keeps trying to return. It will not be the navigation system
formerly known as Loran C (Wasn't that also some singer?) it will be
eLoran. Most eLORAN systems add an additional pulse for data. They stick
somewhat to the old format to avoid possible interference with operating
syste
Poul-Henning,
The reason to stay with the LORAN C style pulses is very very simple. It
allows our time-nuts Austrons and SRS to work. Its the only way I get any
of my tax dollars back. :-)
The good news is no official government person reads time-nuts.
Regards
Paul
On Tue, Jul 14, 2015 at 12:16 P
t; notice in the papers that “infinite budget” does not seem to apply to the
>> US DOD these
>> days. For commercial systems, nobody will significantly cut into profits
>> to do something like this.
>>
>> Should they do this - sure. Will they do it - nope.
>>
>&
John
I don't know if there was. But the timing receivers like the Austrons and
SRS could really derive very accurate frequencies especially if you lived
60 miles from the transmitter. :-)
Regards
Paul.
WB8TSL
On Wed, Jul 15, 2015 at 4:23 AM, John C. Westmoreland, P.E. <
j...@westmorelandengineerin
David
Any LORAN C boat antenna will work fine. I do know that if you have a
distribution system then to make the SRS happy you need to add a 420 ohm R
to ground to act as a antenna preamp current load. It checks.
Equally a fet/transistor VLF preamp will work well. Even a long length of
wire if the
I reached out to UrsaNav and asked when the next test would be.
They were very responsive.
Wildwood, NJ will be on air from 0900 (local) on 20 July until 0900 (local)
on 23 July for an eLoran test.
So fire up your Austrons and SRS units.
There will be additional tests and they may be from differ
k on the mailing list recently.
>
> I just picked up a NOS 2100F on eBay to play around with. Maybe I'll be
> able to do something useful with it one day if they continue with eLoran
> tests.
>
> Dan
>
> > On Jul 15, 2015, at 1:17 PM, paul swed wrote:
> >
> >
I had not been paying attention to the thread but it has evolved into an
area I had a question about. Typical LORAN C systems are the vlf preamp and
whip.
You never see anything about larger antennas such as might be used from the
US to receive Europe stations.
For WWVB 60 KHz I built a large loop
Ulrich,
Nice picture. What are you doing with the crystal? I have several older
crystals that are nice but have never done anything with them.
Regards
Paul
WB8TSL
On Thu, Jul 16, 2015 at 6:02 PM, KA2WEU--- via time-nuts wrote:
>
>
> I am working with this .. amazing device, Ulrich N1UL
> ___
OK LORAN is on the air up in Boston.
I had just turned off various equipment this morning.
So starting it back up after testing it yesterday.
Lots of large static crashes.
Regards
Paul
WB8TSL
On Sat, Jul 18, 2015 at 7:04 AM, billriches wrote:
> FYI Wildwood eLoran will be fired up 1300Z Saturday
Bill I will let you know what the Austrons say for signal level. Fact is
they locked up fast.
My FS700 is taking its time.
Graham it will sound different as there are no competing stations on other
GRIs. Thats the very first thing that hits you. Additionally its only 1
station. But that same stati
Regards
Paul.
___
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.
The system came up at 9 am and has been working well the austrons and SRS
fs 700 are doing very well. Some static crashes and such.
This test has however revealed something I did not want to know. The HP
z3801 seems to have a problem of jumping phase. So the trusty box is
finally showing its age.
ot;
> 73
> Alex
>
>
> On 7/20/2015 1:50 PM, paul swed wrote:
>
>> The system came up at 9 am and has been working well the austrons and SRS
>> fs 700 are doing very well. Some static crashes and such.
>>
>> This test has however revealed something I did not wan
Max
I believe the inputs far more flexible then the limit suggested. Typically
the low level is the issue. In the spec sheet I see it says .15V.
If you had a 10 db anttenuator that would be a good start.
The good news is it sounds like you have enough signal to drive both things
pretty easily.
Rega
Absolutely have it working. Absolutely a considerable project. In a
nutshell I found another gps unit that was older and had lots of points to
access. Not a fully integrated IC. Then up converted its 35 Mhz IF with a
40 Mhz signal. All had to be driven from the austron 10 Mhz reference
signal. OK s
Time to let the gear cool down and lower the power bill here in Boston.
I suspect my HP Z3801 is actually ok and speculate they may have been
messing with the signal at times. I will ask and also send them some
observations.
Regards
Paul
WB8TSL
___
time-n
Was a good week for eLORAN I was able to check out much of my equipment.
Next possible test may be 6-7 August. Not firm.
Possibly from Dana Indiana. One of the original actual LORAN C sites.
Wildwood NJ was and is a test site and at lower power and a shorter antenna
I believe.
I did send my recepti
Dan next test 6-7 August not much time.
What is your location?
Paul
WB8TSL
On Sat, Jul 25, 2015 at 4:02 PM, Dan Watson wrote:
> I bought a nice Austron 2100F this past week. It is very much "new old
> stock". The unit is pristine and powers up just fine. I'll have to get an
> antenna built befo
I don't think there is one. Watch out there is one located I believe on a
Chinese site. I was told its actually malware.
On Sun, Jul 26, 2015 at 9:49 AM, Dan Watson wrote:
> Sure. I uploaded a scan of the catalog parts to KO4BB. It's listed in
> Recent Uploads awaiting sorting.
>
> As for the 21
Jason
If you build a single conversion front end as you suggest, then the LO will
be 1500 MHz and low side injection causing a 180 degree phase flip.
Hopefully not a real issue.
The thing I ran into when I built my solution is that front end LO had to
be locked to the 10 Mhz out of the Austron. The
Bob
Just took a look and the pair seems to still be at $150. Maybe it was a
special?
The ovens are as you say $25 each and shipping for either 1 or 2 is $18.75.
Regards
Paul
WB8TSL
On Mon, Jul 27, 2015 at 8:44 PM, Bob Camp wrote:
> Hi
>
> For all of you who dropped off the list back around Chris
In looking at the threads and putting away the Austron catalog I realized I
have a 2100 pdf with schematics.
Its 8.9 MB so will send it to the Diddiers KO4BB site tonight.
Regards
Paul
WB8TSL
___
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To unsubscribe
Chuck
I suspect it actually is for you. As you say you now have a great deal of
insight that you did not before and as I have often read here. Its funny
how we have all learned about the nasty effects of age. Ahhh I mean
equipment that is.
So I would bet you could get it going. The RB elements in t
The Wildwood, NJ Transmitter will be on air from 0900 (EDT) 06 August until
1800 (EDT) 07 August. Wildwood will be broadcasting as 8970 Master and
Secondary.
The Dana, IN transmitter will also be on air intermittently during this
time period. Dana will be broadcasting as 9960 Master and possibly o
Pete
Always the interesting tid bits.
Thats the same double oven in the HP Z3801
I have one that went nuts. What a gooey mess. I set the whole thing on the
shelf as a someday project. The Z3801 actually has something besides that
as an issue.
Regards
Paul.
WB8TSL
On Tue, Aug 4, 2015 at 12:47 PM, P
Don nothing magical. Simply no market.
Regards
Paul
WB8TSL
On Tue, Aug 4, 2015 at 6:43 PM, Donald wrote:
> I have been looking into WWVB receivers.
>
> I see that the sources I had purchased from a few years ago are no longer
> available(in the US).
>
> I see that the format of the WWVB signal h
not on that I can see
On Thu, Aug 6, 2015 at 12:46 PM, D W wrote:
> Picking up a strong signal here in North Carolina. My 2100F has been
> locked to Wildwood all morning. I'm using a 5' wire whip and a home brew
> preamp.
>
> Not hearing Dana yet.
>
> Dan
>
&g
FN41sr
>
>
>
>
> On 8/6/2015 4:10 PM, paul swed wrote:
>
>> not on that I can see
>>
>> On Thu, Aug 6, 2015 at 12:46 PM, D W wrote:
>>
>> Picking up a strong signal here in North Carolina. My 2100F has been
>>> locked to Wildwood all m
Bob there is enough interest you may want to resend it here.
Just a thought.
Paul
WB8TSL
On Fri, Aug 7, 2015 at 5:24 AM, Graham wrote:
> Bob,
>
> I would like that information too please and thank you.
>
> I have a pair that is working quite well and I also have a second REF-0
> that I want to s
Looking forward to the notes.
Yes it could be fairly simple if what ref 0 wants is a string that
essentially says the system is fixed with 3 d accuracy. Perhaps after that
the ref 0 makes no checks other then the string keeps coming with the
correct quality. Not to push a particular proc but any of
e the serial string from a Jupiter-T
> and display the information on a 4 line LCD display. It worked very nicely
> but I never did anything useful with it. I think I'll take Bob's notes and
> incorporate the REF-0. That would make for a very compact setup.
>
> Dan
>
>
sees the same sat’s at the same locations
> >> directly
> >> over it’s own north pole location. It just wants data in the field.
> >>
> >> It does care about the TRAIM status and probably a few other bits here
> >> and there.
> >> None of them appea
I looked at the site its the typical cmall board with everything on it.
Saves you the trouble of doing that very fine soldering.
No antenna.
Regards
Paul
WB8TSL
On Sat, Aug 8, 2015 at 1:16 PM, Bob Camp wrote:
> HI
>
> Discrete as in resistors and transistors or discrete as in “stuff plus an
> MC
Dan
A really nice blog even with colored dots on the pins. Can't get much
better then that. Fantastic on the strings that are needed to keep the Ref
0 happy and there timing.
Regards
Paul
WB8TSL
On Mon, Aug 10, 2015 at 7:16 AM, Bob Camp wrote:
> Hi
>
> Yes, Paul posted a link yesterday that incl
If you need time the GPS chips are the way to go.
Heavens for $11 I think you get the complete system with antenna.
The old wwvb chips do still work as well as they ever did. They detect AM
and thats still a part of the format. They are as reliable as they ever
were. (Sort of not if you live on the
Agree with Bob. The fact that the top is blown off sounds like a bit of
lightning.
You can easily adapt a classic npn or pnp in for a temporary test. 3904 or
3906.
I have needed to do this on other things. It confirms quickly thats the
issue and then you just need the new smt to solder in.
I fear y
OK I can contribute at least something.
Given the popular REF1 thread. Ebay has some 15 pin connectors that appear
to be whats needed 10 for $3.49 shipping from China makes it $5.50. The all
sell singles at 99 cents.
I ordered a set today and should see them in several weeks.
Granted they are not t
tired old eyes, the stuff all looks the same
> regardless of source.
> I might not say that for a space shot application. For my basement, it’s
> same / same.
> They aren’t big enough to take up a lot of space, so stocking up from time
> to time is
> not that big a deal. Already in
Heinz
I think you are working.
I have the ref1 and ref 0 crystal unit and when operational thats the way
the LEDs work.
On my unit the system locks in 15-30 minutes from a cold start.
On start up the LEDs should step.
Then the top 2 should turn on. No gps and fault
15 minutes later fault of green
OK I know some you have new receivers and here is your chance to test them
out along with antennas.
The Wildwood eLoran transmitter will be continuously broadcasting from 0900
(EDT) on 25 August 2015 through 1800 (EDT) on 28 August 2015. Wildwood will
be broadcasting as 8970 Master and Secondary.
Mark
Many of us would like those details but they have never crossed time-nuts
path as far as I know.
There has however been various reverse hacks that are helpful. Basically
time-nuts have figure out this and that power supply voltages and such.
Gross stuff. Some have ventured down into Forth.
But
The CS oven in say a HP5061 runs on a ac signal. I think its a 2KHz approx.
If that oven were to be run on DC could that effect the frequency offset of
the CS reference.
I do not believe that it would effect the frequency but the oven controller
in the 5060/5061is fairly complicated and I just star
To add a note to this fine conversation.
I have built up several different arduinos to drive the REF 0s using Dans
program. They all worked and the last unit is the postage stamp size
arduino mini.
Interestingly its close to the same form factor as the ublox neo6 I have
been using. A $11 wonder. B
Hello fellow time nuts. I started a long journey to deal with the wwvb BPSK
signal over 3 years ago. Since then I have released reactive solutions that
have been shared. Generally in the form of costas loops for phase tracking
receivers like the Fluke 207 etc and then the remodulator for the
timecl
Flip them half way through the bit time. You will be wrong on every single
> bit. You will only be wrong for half the time. The noise suppression in
> the older
> receivers should deal with short(er) blips better than long(er) ones.
>
> Bob
>
> > On Sep 17, 2015, at 9:37 PM, pa
Charles like you I have quite a few gpsdo's that are far superior to wwvb
at least on the east coast in reality. But all of that said I actually used
wwvb more for propagation studies to watch the ionosphere. Its always been
interesting.
Not that any of it matters if all of GPS is gone my real inte
This absolutely requires GPS all of the time.
In recalculates the entire 1 minute sentence every minute at 00 in the
first 200ms.
But that was a choice. The actual clock could run till you pull the plug.
I choice the get it done approach.
What is key is an accurate stable 1 PPS.
All of that said i
I did go out to look for the "The Quantum Physics of Atomic Frequency
Standards. Did see numerous pay for sites and then others that were very
questionable.
There were two possible sites. One appera to be an Italian Amateur and the
other a Chinese site. Anyone have a semi trusted link please.
Regar
Dan it looks like the thread has re-developed.
As my early test of your simple solution demonstrated. Better PPS better
stability (Used a TBolt to test this) in the form of semi-short term
jitter. The beauty of Dans solution is the user can select the quality and
cost of the receiver used. Anything
The Wildwood eLoran transmitter will be continuously broadcasting from 0900
(EDT) on 20 October 2015 through 1800 (EDT) on 22 October 2015. Wildwood
will be broadcasting as 8970 Master and Secondary.
Regards
Paul
WB8TSL
___
time-nuts mailing list -- time-
Crazy bit of humor/timing in all of this I guess.
Oddly at the last MIT flea I picked up a very nice astro-compass including
case and manual. Also a news clipping that the Navy was restarting training
on celestial navigation. Now I just need to add a mount to the car dash
board.
All prepared for t
Brooke
An interesting question and like you I have seen the odd frequencies.
For the 10.230 MHz since they come out exactly at the carrier frequency
that would tend to speak to a direct conversion receiver.
At least on the much older receivers that had IF stages at either 75 Mhz or
35 Mhz and ther
The Wildwood eLoran Transmitter will be on air for testing purposes from
0900 (EST) on 03 November until 1200 (EST) on 06 November and then again
from 0900 (EST) on 09 November until 1500 (EST) on 13 November. Wildwood
will be broadcasting as 8970 Master and Secondary.
Regards
Paul
WB8TSL
Greg
Not sure what location they were uploaded to.
Regards
Paul
On Fri, Oct 30, 2015 at 9:32 AM, Gregory Beat wrote:
> The HP/Symmetricom 58834A-H01 timing receiver/antenna used the Furuno
> GT-77 (8-channel) and GT-80 (16-channel) GPS receivers in its outdoor
> radome.
>
> I have uploaded the H
Chris welcome to the group.
Several comments.
The 1 or 2 Hz most likely is trigger and jitter. Its somewhat odd that you
are off by 2 Hz. Typically its 1 Hz.
I suspect you are also working 136 KHz. With respect to sound cards the
internal clock could be replaced and locked if its at all accessible.
Hello to the group.
I have to say I keep coming back to these pictures of the syncronometer.
Wow did it arrive in that clean condition? If not how did you restore it? I
mean it appears evenin the hard to get to corners there is no grime build
up.
Regards
Paul
WB8TSL
On Tue, Nov 3, 2015 at 3:32 PM,
Steve
My very small 10 cents.
I am pretty sure win 95 had no idea what USB is. I think thats was win98
sp2 region.
Certainly win10 wouldn't understand what that program was.
But that said there are dos emulators/virtual machines that might let you
get away with it. The other comment is if the devi
> >
> > Today's Topics:
> >
> >1. NAVSTAR proteus GPS time and frequency unit (Stephen Farthing)
> >2. Re: NAVSTAR proteus GPS time and frequency unit (Bob Camp)
> >3. Re: NAVSTAR proteus GPS time and frequency unit (paul swed)
> >4. Gen
Because the roll over is a pain.
Thats good engineering if they checked that far.
What happens if you have a receiver that doesn't handle it correctly is you
do not tend to get satellite lock because the dates all wrong.
You cheat this "The pain part" by figuring out what the date should have
been
11/09/2015 01:07 AM, paul swed wrote:
>
>> Because the roll over is a pain.
>> Thats good engineering if they checked that far.
>> What happens if you have a receiver that doesn't handle it correctly is
>> you
>> do not tend to get satellite lock because t
OK great conversation.
Not sure when but far sooner then later will fire the system up and just
let it run for a week.
Regards
Paul
WB8TSL
On Mon, Nov 9, 2015 at 1:09 PM, Hal Murray wrote:
>
> paulsw...@gmail.com said:
> > Hmmm then why do I have to figure it out at all? I don't care what the
>
Well for the heck of it I just fired the austron 2201 up. Date was circa
1980 or something way back. Guess the battery went. That said set the date
and time to UTC and let it go. Almanac seems to grab a satellite every now
and then but it does not go into the full track mode.
I normally cheat this
There is a good discussion about old GPS receivers that have been running.
Its the NAVSTAR proteus thread.
Very good details in that thread about some issues. Such as the 1024 week
rollover and that the receiver should still keep working. Though the date
and time would be wrong.
Given that theory I
it to
track a satellite and it does. Though even at that it seems to have issues
I speculate as poor signal to noise.
So may have to do some digging.
Thanks
Paul.
On Tue, Nov 10, 2015 at 9:06 PM, Magnus Danielson <
mag...@rubidium.dyndns.org> wrote:
> Paul,
>
> On 11/10/2015 08:5
Charles I agree with what needs to be looked at first and thats the
downconverter. Its really a starlink GPS receiver that I tapped the RF off
of and upconverted to 75.42 Mhz for the 2201. The startlink is driven and
controlled from the corrected 10 Mhz 2201signal that would have gone to the
origin
Pete,
I would doubt anything is directly available.
But if there is hope for some hack its certainly here from my experience.
Hack may be the actual reality. Got a saw?
Good luck because one day sooner then later I suspect I will ask the same
question.
Regards
Paul
WB8TSL
On Fri, Nov 13, 2015 at 2
Tim
Its a good article and Reginald and I have been discussing offline. If you
like lots of opamps its very good. Its pretty much all discreet easy to
wire parts. But a lot of them. We have looked at the 10 Mhz VCO and even
calling Bomar and its not available so will guess like many projects its
wh
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