Re: [time-nuts] Oncore UT+ Battery Backup

[Chris Albertson]

I had a dead PC motherboard and unsoldered a coin battery holder and the
battery.  The backup battery's shelf life is the limiting factor so the
little coin battery will outlast the AA cell.The battery only backs up
the memory and there is not much of a load on it, the self-discharge load
is likely higher for the alkaline cell.


On Wed, Jun 26, 2013 at 9:10 PM, Bob Stewart  wrote:

> My UT+ unit does not have the onboard battery.  In looking at the various
> manuals, I see that the battery backup voltage is from +2.5 to +5.25V.  So,
> should I grab a 3V lithium cell and mount off an old motherboard, or should
> I use a pair of AA batteries in a holder I think I have around here
> "somewhere"?  Or is it just whatever comes to hand is fine?  I think the
> drain is only micro-amps.
>
> Bob - AE6RV
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>



-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] Oncore UT+ Battery Backup

[Robert Atkinson]

As a side note, I'd use lithiums rather than AA's 

(alkaline) purely because they don't tend to leak corrosive electrolyte all 
over your expensive electronics if (when) you forget to change them. Lithiums 
have a longer shelf life too.



From: mike cook 
To: Discussion of precise time and frequency measurement  
Sent: Thursday, 27 June 2013, 6:28
Subject: Re: [time-nuts] Oncore UT+ Battery Backup



Le 27 juin 2013 à 07:04, Mark C. Stephens a écrit :

> I do believe the UT+ will try to charge the battery while on, so some sort of 
> rechargeable lithium cell is in order. 
> 

Yes, you need to connect our battery via Pin1if not using a rechargeable on 
board. 

> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On 
> Behalf Of Bob Stewart
> Sent: Thursday, 27 June 2013 2:11 PM
> To: Time Nuts
> Subject: [time-nuts] Oncore UT+ Battery Backup
> 
> My UT+ unit does not have the onboard battery.  In looking at the various 
> manuals, I see that the battery backup voltage is from +2.5 to +5.25V.  So, 
> should I grab a 3V lithium cell and mount off an old motherboard, or should I 
> use a pair of AA batteries in a holder I think I have around here 
> "somewhere"?  Or is it just whatever comes to hand is fine?  I think the 
> drain is only micro-amps.
> 
> Bob - AE6RV
> ___
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> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 
> 
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Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS

[Scott McGrath]

Why many US sellers will not ship internationally.  It's fun to bash Americans 
because most of them don't have a passport but that's not the reason in this 
case.

 It's simple paperwork which must be maintained for inspection by a bunch of 
federal agencies for a minimum of 7 years.  And may your $DEITY help you if 
it's a dual use item which ends up somewhere its not supposed to be.

It's not the shipping it's the record keeping and legal liability which prevent 
many US sellers from shipping internationally it's simply not worth going to 
jail because you lost a customs declaration or someone sold their Rb oscillator 
to someone in the US embargoed states list.  Does not matter that YOU did not 
sell it someone else did.  You are still responsible for it until destroyed if 
its a dual use device if you exported it from US. And people wonder why US 
sellers don't want to deal with international sales.



Sent from my iPhone

On Jun 26, 2013, at 7:04 PM, "Mike M"  wrote:

>  Mark C. Stephens
>  Wed Jun 26 10:12:53 EDT 2013
> 
>> RDR have some fantastic stuff.
> 
>> But they won't ship outside of USA.
> 
>> I have  tried everything but according to Mark  Cole  the manager,
>> "The loss  of  time  and   the  additional  risk  of international
>> shipping doesn't fit with our business profile"
> 
>  I don't  know  why   they   think   there  is  additional  risk with
>  international shipments. Just send it with a signature required, and
>  it has exactly the same risk as any ordinary shipment in the US. But
>  a lot of vendors feel the same way.
> 
>  If you are in Canada, you can have them ship to a forwarder who will
>  then ship  it across the border for you. Of course,  they  add their
>  extra charge for the service.
> 
>  If you  are  outside the US and would like to  get  a  M12+, fluke.l
>  sells them for $35.00 plus shipping. See
> 
>  Motorola ONCORE M12+T timing gps receiver 1pps 100hz
> 
>  http://www.ebay.com/itm/290656401551
> 
>  I have  dealt with fluke.l for many years. His stuff is of  the very
>  highest quality  and  he checks it  carefully  before  shipment. His
>  prices are a bit higher than some others, but other vendors may ship
>  you worthless junk like tool_nerd.
> 
>  fluke.l has  the  lab equipment and experience to  know  what  he is
>  doing and  ships only the highest quality stuff. See  his  web store
>  for example of his lab setup.
> 
>  But under no circumstance ever buy anything on eBay from tool_nerd.
> 
>  They ship  junk that has been badly abused. They failed  to  warn me
>  that I had to modify a FE-5680A Rubidium oscillator in order  to get
>  access to  the variable frequency output. Not only was this  a large
>  amount of  work  to  drill all the  rivets  out,  it  risked getting
>  shavings inside  the unit when drilling the case for  the  coax. The
>  unit arrived  with deep gouges in the cover, indicating it  had been
>  treated very badly.
> 
>  I told them I would not accept such crap, and wanted to send it back
>  for refund.  They said OK, they would refund the entire  amount when
>  it arrived.  I sent it to the exact address they gave  me,  and they
>  refused to acknowledge receipt. In fact, they stopped replying to my
>  emails when  it arrived. So I am out the $83.00 for  the  unit, plus
>  the $20.00 postage. It would have cost far too much to send  it with
>  a signature  required, but they convinced me they  were  very honest
>  and would honor the agreement.
> 
>  I should  have never wasted my time and money. Don't  make  the same
>  mistake.
> 
>  Regards,
> 
>  Mike M
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Re: [time-nuts] wwvb 60 khz tuning fork crystals Some insights

[ed breya]

Email still seems to not be getting through - it seems like sending 
twice works sometimes. Here this one goes again - sorry if it shows up twice:


I presume you used the regular 74HC04 or 74HCU04 inverter, not the 
74HC14 Schmitt trigger input type?? If the '14 is actually used, that 
may explain the problems around setting the feedback biasing resistor 
value - you may be overriding the built-in hysteresis to get it in 
the linear region. Usually that R isn't very critical with regular 
crystals, but maybe tuning fork types need more gain, or, if it's 
actually a '14, the input impedance is probably lower than a regular 
gate, so it's loading the resonator.


Ed

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Re: [time-nuts] Oncore UT+ Battery Backup

[mike cook]

Le 27 juin 2013 à 07:04, Mark C. Stephens a écrit :

> I do believe the UT+ will try to charge the battery while on, so some sort of 
> rechargeable lithium cell is in order. 
> 

 Yes, you need to connect our battery via Pin1if not using a rechargeable on 
board. 

> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On 
> Behalf Of Bob Stewart
> Sent: Thursday, 27 June 2013 2:11 PM
> To: Time Nuts
> Subject: [time-nuts] Oncore UT+ Battery Backup
> 
> My UT+ unit does not have the onboard battery.  In looking at the various 
> manuals, I see that the battery backup voltage is from +2.5 to +5.25V.  So, 
> should I grab a 3V lithium cell and mount off an old motherboard, or should I 
> use a pair of AA batteries in a holder I think I have around here 
> "somewhere"?  Or is it just whatever comes to hand is fine?  I think the 
> drain is only micro-amps.
> 
> Bob - AE6RV
> ___
> 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.
> 
> 
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> and follow the instructions there.

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Re: [time-nuts] OT Prototype Boards

[David J Taylor]

Oh dear. Please go metric US. Please.

We will help you.

Jim
===

Even being metric (and my own country is shamefully slow in adopting metres 
for travel distances and litres for selling e.g. milk), did not stop errors 
in setting the zero degree line of the GPS system actually /on/ the 
Greenwich prime meridian - see:


 
http://www.rmg.co.uk/explore/astronomy-and-time/astronomy-facts/history/the-longitude-of-greenwich

David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk 


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Re: [time-nuts] BBC Precision: Measure of All Things

[Doug Calvert]

On Wed, Jun 26, 2013 at 10:07 PM, Dan Rae  wrote:
>>
> And BBC tv shows are not available (legitimately) for download or on demand
> outside the UK anyway.


What is your point? Would you prefer  that I only post things that are
relevant to time nuts on this side of the pond?
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Re: [time-nuts] Oncore UT+ Battery Backup

[Mark C. Stephens]

I do believe the UT+ will try to charge the battery while on, so some sort of 
rechargeable lithium cell is in order. 

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Bob Stewart
Sent: Thursday, 27 June 2013 2:11 PM
To: Time Nuts
Subject: [time-nuts] Oncore UT+ Battery Backup

My UT+ unit does not have the onboard battery.  In looking at the various 
manuals, I see that the battery backup voltage is from +2.5 to +5.25V.  So, 
should I grab a 3V lithium cell and mount off an old motherboard, or should I 
use a pair of AA batteries in a holder I think I have around here "somewhere"?  
Or is it just whatever comes to hand is fine?  I think the drain is only 
micro-amps.

Bob - AE6RV
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and follow the instructions there.


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[time-nuts] Some videos from the recent Symmetricom 3120A webinar

[John Miles]

Here are some short demo videos that we used in our webinar recently
(http://www.symmetricom.com/resources/downloads/webcasts/#Government%20Solut
ions ).  They're focused on the Symmetricom 3120A test set (née TimePod
5330A) but they illustrate some basic stability/noise measurement concepts
that apply to other instruments as well.  They're worth checking out if you
use TimeLab, even with a counter, since the software is almost the same.  

 

Video:
https://www.dropbox.com/s/r6u83nmc70qpy8t/Evaluate_compare_and_calibrate_fre
quency_standards.mpeg

(viewable at http://www.youtube.com/watch?v=RgTVs4jqV6U )

Time: 4'30"

 

Video:
https://www.dropbox.com/s/psmpfeni8v1h5ku/Characterize_noise_and_jitter_of_O
CXO.mpeg

(viewable at http://www.youtube.com/watch?v=9PG9KNcmRPk )

Time: 5'49"

 

Video:
https://www.dropbox.com/s/s87ubu8q95etgs7/Observe_holdover_and_recovery_of_G
PSDO.mpeg

(viewable at http://www.youtube.com/watch?v=Jh8WOUVU46k )

Time: 3'49"

 

Video:
https://www.dropbox.com/s/f95r12b5hbpxhvz/Measure_residual_noise_of_10_MHz_a
mplifier.mpeg

(viewable at http://www.youtube.com/watch?v=d6Iq9M73Tcw )

Time: 5'05"

 

Video:
https://www.dropbox.com/s/po2ugf028p0dwef/Assess_mechanical_phase_stability.
mpeg

(viewable at http://www.youtube.com/watch?v=CvgSqhZb5iM )

Time: 4'07"

 

(Disclaimers: I'm no longer selling these units myself, but I'm working with
Symmetricom on both marketing and development.  No animals were harmed in
the making of these videos, although some valence electrons were temporarily
inconvenienced.)

 

-- john

Miles Design LLC

  

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[time-nuts] Oncore UT+ Battery Backup

[Bob Stewart]

My UT+ unit does not have the onboard battery.  In looking at the various 
manuals, I see that the battery backup voltage is from +2.5 to +5.25V.  So, 
should I grab a 3V lithium cell and mount off an old motherboard, or should I 
use a pair of AA batteries in a holder I think I have around here "somewhere"?  
Or is it just whatever comes to hand is fine?  I think the drain is only 
micro-amps.

Bob - AE6RV
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[time-nuts] wwvb 60 khz tuning fork crystals Some insights

[Burt I. Weiner]

Paul,

The stuffs I ordered from DigiKey came yesterday.  Those are really 
small tuning fork crystals!


In your notes below... you said, " The feedback resistor has to be 
very large I was surprised by how large. 22 M and I could go higher."


hen you said, "Anything above 270-330K cause startup issues."

Did you mean anything below 270-330K causes startup issues?"

Burt

At 08:02 PM 6/26/2013, time-nuts-requ...@febo.com wrote

Subject: [time-nuts] wwvb 60 khz tuning fork crystals Some insights


Working on the wwvb remodulator and have learned a fair amount about tuning
fork crystals.
there is a fair amount of information out there. It seems generally the
same thing and as it turned out perhaps not all that useful.
This is what I have done a schematic in words.
Using a single 74hc14 inverter feeding a buffer inverter pins 3 and 4
22 M feedback resistor pin 1 to 2
Xtal feed back path
Pin 2 to 50K variable pot to a 68K and 100K resistor in series to 230 pf to
ground.
This same junction has the 60 Khz xtal feeding then back to pin 1.
Power supply is a CS5206 3.3V LDO 22uf and .047uf to ground.

The 230pf cap grossly gets the system close to frequency. About 5 Hz.
Adjusting the variable pot puts the xtal on frequency.
Granted this is simply changing the crystal drive. But it works well.
The 50K pot gives about 8 Hz adjustment range.
I did indeed use small variable plastic caps. They were a pain to use
actually.
Granted a high quality air variable would be good and you can tell how its
been adjusted.
Not so with the plastic caps. You are a bit blind.

I then tested 10 xtals out of 50 a random sampling.
They ranged from 59.996 to 60.005 some came close to the original mouse
xtal I built the system with below 1 Hz.

Conclusion
The 60 Khz xtals will need a way to adjust. They simply are never close.
The feedback resistor has to be very large I was surprised by how large. 22
M and I could go higher.
Lowering the drive raises the frequency to a point. Anything above 270-330K
cause startup issues.
The circuit as describes starts very quickly sub 200 ms.
I will update the wwvb remodulator schematic with this information and most
likely make a real schematic and also build up my own remodulator for use
until I add the remodulator to the d-psk-r to create a single package.
Regards
Paul
WB8TSL


Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
b...@att.net
www.biwa.cc
K6OQK 


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Re: [time-nuts] BBC Precision: Measure of All Things

[Dan Rae]

On 6/26/2013 6:53 PM, David Kirkby wrote:

On 27 June 2013 01:45, Doug Calvert  wrote:

The BBC recently did a three part series titled Precisoin: The Measure
of All Things.

Part 1 is Time and Distance
Part 2 Mass and Moles
Part 3 Is Heat, Light and Electricity

Probably nothing ground breaking for any time nuts but may be
interesting to watch with friends and amily.

http://www.bbc.co.uk/programmes/b02xbjmf

Note the BBC only makes programs playable for a short duration (I
think 30 days), and there is only 5 days left. Even if you download a
program, it wont run beyond its "expiry date". Not that I suspect it
would be too hard for a time-nut to circumvent it - set back the time
of machine, run in a virtual machine etc.

And BBC tv shows are not available (legitimately) for download or on 
demand outside the UK anyway.


dr
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Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K,

[Mark C. Stephens]

I miss-advertently restarted the GPSR-A due to the after effects of a liquid 
lunch.. 

and about 30 minutes later:

E-113>:syst:stat?
[ Active ]  GPSR 2 Status 
SYNCHRONIZATION ... [ Outputs Valid/Reduced Accuracy ]
SmartClock Mode _Reference OutPuts ___
>> Locked to GPS TFOM 3  FFOM0
   Recovery  1PPS TI  +400 ns
   Holdover  HOLD THR
   Power-up  Holdover Uncertainty_
 Predict

ACQUISITION ... [ GPS 1PPS Valid ]
Tracking: 8   Not Tracking: 4Time 
PRN  El  Az  C/N   PRN  El  Az   GPS  02:56:29 27 Jun 2013
  3   25 228   50   15  Not OK   GPS 1PPS  Synchronized to GPS
  6   42 239   49   16  Not OK   ANT DLY   0 ns
 14   21 349   51   24  Not OK   Position 
 18   70 181   46   29  Not OK   MODE Survey:  45.0% complete
 190   0   48
 21   62 109   52AVG LAT  S  33:45:49.292
 22   54 268   50AVG LON  E 151:05:31.486
 27   34 229   52AVG HGT  +112.91 m  (MSL)
ELEV MASK 10 deg
HEALTH MONITOR  [ OK ]
Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
Alarms:(none)


Now, Compared to a Z3805A for the same time, same place:

 HEWLETT-PACKARD,Z3805A,3502A00508,3543B-A. Life count: 33099
SYNCHRONIZATION . [ Outputs Valid ]
SmartClock Mode ___   Reference Outputs ___
>> Locked to GPS  TFOM 3 FFOM 0
   Recovery   1PPS TI +3.0 ns relative to GPS
   Holdover   HOLD THR 1.000 us
   Power-up   Holdover Uncertainty 
  Predict  1.3 us/initial 24 hrs

ACQUISITION  [ GPS 1PPS CLK Valid ]
Satellite Status __   Time 
Tracking: 6Not Tracking: 4LOCAL12:55:57 27 Jun 2013
PRN  El  Az   SS   PRN  El  Az1PPS CLK Synchronized to UTC
  6  49 276   94 3  36 252ANT DLY  28 ns
 14  47 347   8615  13 137Position 
 18  52 139  16719  25 227MODE Hold
 21  46  71  13024  18 103
 22  65 218  184  LAT  S  33:45:49.225
 27  47 258  114  LON  E 151:05:31.528
ELEV MASK 10 deg  HGT   +80.11 m  (MSL)
HEALTH MONITOR . [ OK ]
Self Test: OKInt Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK 

Actually, A Z3815A might be better as it uses c/n

  HEWLETT-PACKARD,Z3815A,KR73503191,U-4010.0-A. Life count: 39166
[ Active ] - GPSR 2 Status 
SYNCHRONIZATION . [ Outputs Valid ]
SmartClock Mode ___   Reference Outputs ___
>> Locked to GPS  TFOM 3 FFOM 0
   Recovery   1PPS TI +12.0 ns relative to GPS
   Holdover   HOLD THR 1.000 us
   Power-up   Holdover Uncertainty 
  Predict: 1.5 us/initial 24 hrs

ACQUISITION  [ GPS 1PPS Valid ]
Tracking: 8    Not Tracking: 2    Time 
PRN  El  Az  C/N   PRN  El  AzLOCAL12:57:40 27 Jun 2013
  3  36 252   5019  25 227GPS 1PPS Synchronized to UTC
  6  48 277   4924  18 103ANT DLY  28 ns
 14  48 347   47  Position 
 15  12 138   44  MODE Hold
 18  52 139   47  
 21  46  71   47  LAT  S  33:45:49.500
 22  65 217   47  LON  E 151:05:31.734
 27  47 258   50  HGT   +95.40 m  (MSL)
ELEV MASK 10 deg  
HEALTH MONITOR 

[time-nuts] wwvb 60 khz tuning fork crystals Some insights

[paul swed]

Working on the wwvb remodulator and have learned a fair amount about tuning
fork crystals.
there is a fair amount of information out there. It seems generally the
same thing and as it turned out perhaps not all that useful.
This is what I have done a schematic in words.
Using a single 74hc14 inverter feeding a buffer inverter pins 3 and 4
22 M feedback resistor pin 1 to 2
Xtal feed back path
Pin 2 to 50K variable pot to a 68K and 100K resistor in series to 230 pf to
ground.
This same junction has the 60 Khz xtal feeding then back to pin 1.
Power supply is a CS5206 3.3V LDO 22uf and .047uf to ground.

The 230pf cap grossly gets the system close to frequency. About 5 Hz.
Adjusting the variable pot puts the xtal on frequency.
Granted this is simply changing the crystal drive. But it works well.
The 50K pot gives about 8 Hz adjustment range.
I did indeed use small variable plastic caps. They were a pain to use
actually.
Granted a high quality air variable would be good and you can tell how its
been adjusted.
Not so with the plastic caps. You are a bit blind.

I then tested 10 xtals out of 50 a random sampling.
They ranged from 59.996 to 60.005 some came close to the original mouse
xtal I built the system with below 1 Hz.

Conclusion
The 60 Khz xtals will need a way to adjust. They simply are never close.
The feedback resistor has to be very large I was surprised by how large. 22
M and I could go higher.
Lowering the drive raises the frequency to a point. Anything above 270-330K
cause startup issues.
The circuit as describes starts very quickly sub 200 ms.
I will update the wwvb remodulator schematic with this information and most
likely make a real schematic and also build up my own remodulator for use
until I add the remodulator to the d-psk-r to create a single package.
Regards
Paul
WB8TSL
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Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS

[Chris Albertson]

>   I don't  know  why   they   think   there  is  additional  risk with
>   international shipments. Just send it with a signature required, and
>   it has exactly the same risk as any ordinary shipment in the US. But
>   a lot of vendors feel the same way.
>

First off most Americans don't have passports and have never left the US
and think of the world outside as some land of mystery.  It rely is true,
especially in parts of the US far from either cost.  But when it comes to
shipping and eBay there are some real concerns because of PayPall's
policies.

Then there is a real problem with customs when shipping into some places.
 The package gets delayed.  The customer tells PayPal they never got the
package and PayPall refunds the money.  The shipper is simply "out".
 PayPall ail always do a refund for non-delivery.Many Chinese eBays
sells have a list of countries they will not sell to because theft by
customs officials is nearly routine.

One thing about that photo of test equipment in a lab.  That EXACT same
photo is used by dozens of eBay sellers.  All of them claim to own this
exact same set of test equipment.   I don't believe even one of them, not
until I see a photo of the stuff in use on a bench testing the gear that is
being offered for sale with a seller's smiling face looking at the camera.
  Otherwise it is just a stock photo that could have been shot in an office
building in Texas 10 years ago.  If it were my stuff you'd see me in the
photo.  Then you look on Facebook and see I'm the same guy.

About your being "out" some money.  Did you ask talk to either eBay or
PayPal about it.  Most items are covered by their buyer protection policy.
  You can make a claim for "not as described" and they will impound the
funds pending resolution.



>   If you are in Canada, you can have them ship to a forwarder who will
>   then ship  it across the border for you. Of course,  they  add their
>   extra charge for the service.
>
>   If you  are  outside the US and would like to  get  a  M12+, fluke.l
>   sells them for $35.00 plus shipping. See
>
>   Motorola ONCORE M12+T timing gps receiver 1pps 100hz
>
>   http://www.ebay.com/itm/290656401551
>
>   I have  dealt with fluke.l for many years. His stuff is of  the very
>   highest quality  and  he checks it  carefully  before  shipment. His
>   prices are a bit higher than some others, but other vendors may ship
>   you worthless junk like tool_nerd.
>
>   fluke.l has  the  lab equipment and experience to  know  what  he is
>   doing and  ships only the highest quality stuff. See  his  web store
>   for example of his lab setup.
>
>   But under no circumstance ever buy anything on eBay from tool_nerd.
>
>   They ship  junk that has been badly abused. They failed  to  warn me
>   that I had to modify a FE-5680A Rubidium oscillator in order  to get
>   access to  the variable frequency output. Not only was this  a large
>   amount of  work  to  drill all the  rivets  out,  it  risked getting
>   shavings inside  the unit when drilling the case for  the  coax. The
>   unit arrived  with deep gouges in the cover, indicating it  had been
>   treated very badly.
>
>   I told them I would not accept such crap, and wanted to send it back
>   for refund.  They said OK, they would refund the entire  amount when
>   it arrived.  I sent it to the exact address they gave  me,  and they
>   refused to acknowledge receipt. In fact, they stopped replying to my
>   emails when  it arrived. So I am out the $83.00 for  the  unit, plus
>   the $20.00 postage. It would have cost far too much to send  it with
>   a signature  required, but they convinced me they  were  very honest
>   and would honor the agreement.
>
>   I should  have never wasted my time and money. Don't  make  the same
>   mistake.
>
>   Regards,
>
>   Mike M
> ___
> 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.
>



-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] Austron 2100 HPIB/GPIB/IEE-488 cards

[paul swed]

There is a strangle hdlc or dual port ram thing.


On Wed, Jun 26, 2013 at 5:15 PM,  wrote:

> Hi Iain,
>
> There's probably not too many of these floating about but it's a very
> straightforward circuit and the Motorola ICs are still available on Ebay,
> albeit
>  probably all recycled, so building one on Veroboard or similar shouldn't
> be  difficult.
>
> There's no programmable devices in the interface circuit and the manual
> instructions for retro-fitting are just plug and go so the standard 2100
> firmware must contain what it needs for the GPIB interface.
>
> Regards
>
> Nigel
> GM8PZR
>
>
> In a message dated 26/06/2013 21:29:53 GMT Daylight Time, i...@g7iii.net
> writes:
>
> Hi  Folks,
>
> Having recently acquired two Austron 2100 Timing Receivers  which
> did not have the GPIB/HPIB/IEEE-488/whatever you wish to call  it
> cards in, I was wondering if any time-nuts had any hanging  around
> that they wanted to dispose of ?
>
> If so, let me know off list,  I'm certainly interested in two (esp
> as I'm currently hoping cleaning the  switch contacts with
> isopropyl alcohol will make them function properly  again)
>
> Having HPIB would get around the problem if the cleansing  fails
> and remote command and control would be very useful  anyway
>
>
> All the  Best
>
> Iain
> ___
> 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.
>
> ___
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> and follow the instructions there.
>
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Re: [time-nuts] OT Prototype Boards

[J. Forster]

The same issue arises with old callendars. What always happens is the old
units are converted to the current standard. You never see a LASER
wavelength in barlycorns.  The current definitions are used and backward
corrected.

-John

==

>
> j...@quikus.com said:
>> There WERE (past tense) a number of definitions of the inch, ranging
>> from
>> lines on bars of PtIr to a string of grain kernels.
>
>> Now there IS (present tense) one, defined as 2.54 cm.
>
> Except...
>
> http://en.wikipedia.org/wiki/Foot_%28unit%29#International_foot
>
> When the international foot was defined in 1959, a great deal of survey
> data
> was already available based on the former definitions, especially in the
> United States and in India. The small difference between the survey and
> the
> international foot would not be detectable on a survey of a small parcel,
> but
> becomes significant for mapping, or when the state plane coordinate system
> is
> used in the US, because the origin of the system may be hundreds of
> thousands
> of feet (hundreds of miles) from the point of interest. Hence the previous
> definitions continued to be used for surveying in the United States and
> India
> for many years, and are denoted survey feet to distinguish them from the
> international foot. The United Kingdom was unaffected by this problem, as
> the
> retriangulation of Great Britain (1936-62) had been done in meters.
>
> The United States survey foot is defined as exactly 1200/3937 meter,
> approximately 0.3048006096 m.[
>
> --
> These are my opinions.  I hate spam.
>
>
>
> ___
> 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.
>
>


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Re: [time-nuts] BBC Precision: Measure of All Things

[David Kirkby]

On 27 June 2013 01:45, Doug Calvert  wrote:
> The BBC recently did a three part series titled Precisoin: The Measure
> of All Things.
>
> Part 1 is Time and Distance
> Part 2 Mass and Moles
> Part 3 Is Heat, Light and Electricity
>
> Probably nothing ground breaking for any time nuts but may be
> interesting to watch with friends and amily.
>
> http://www.bbc.co.uk/programmes/b02xbjmf

Note the BBC only makes programs playable for a short duration (I
think 30 days), and there is only 5 days left. Even if you download a
program, it wont run beyond its "expiry date". Not that I suspect it
would be too hard for a time-nut to circumvent it - set back the time
of machine, run in a virtual machine etc.

Dave
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Re: [time-nuts] OT Prototype Boards

[Jim Palfreyman]

Oh dear. Please go metric US. Please.

We will help you.

Jim



On 27 June 2013 11:33, Hal Murray  wrote:

>
> j...@quikus.com said:
> > There WERE (past tense) a number of definitions of the inch, ranging from
> > lines on bars of PtIr to a string of grain kernels.
>
> > Now there IS (present tense) one, defined as 2.54 cm.
>
> Except...
>
> http://en.wikipedia.org/wiki/Foot_%28unit%29#International_foot
>
> When the international foot was defined in 1959, a great deal of survey
> data
> was already available based on the former definitions, especially in the
> United States and in India. The small difference between the survey and the
> international foot would not be detectable on a survey of a small parcel,
> but
> becomes significant for mapping, or when the state plane coordinate system
> is
> used in the US, because the origin of the system may be hundreds of
> thousands
> of feet (hundreds of miles) from the point of interest. Hence the previous
> definitions continued to be used for surveying in the United States and
> India
> for many years, and are denoted survey feet to distinguish them from the
> international foot. The United Kingdom was unaffected by this problem, as
> the
> retriangulation of Great Britain (1936-62) had been done in meters.
>
> The United States survey foot is defined as exactly 1200/3937 meter,
> approximately 0.3048006096 m.[
>
> --
> These are my opinions.  I hate spam.
>
>
>
> ___
> 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.
>
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Re: [time-nuts] OT Prototype Boards

[Hal Murray]

j...@quikus.com said:
> There WERE (past tense) a number of definitions of the inch, ranging from
> lines on bars of PtIr to a string of grain kernels.

> Now there IS (present tense) one, defined as 2.54 cm. 

Except...

http://en.wikipedia.org/wiki/Foot_%28unit%29#International_foot

When the international foot was defined in 1959, a great deal of survey data 
was already available based on the former definitions, especially in the 
United States and in India. The small difference between the survey and the 
international foot would not be detectable on a survey of a small parcel, but 
becomes significant for mapping, or when the state plane coordinate system is 
used in the US, because the origin of the system may be hundreds of thousands 
of feet (hundreds of miles) from the point of interest. Hence the previous 
definitions continued to be used for surveying in the United States and India 
for many years, and are denoted survey feet to distinguish them from the 
international foot. The United Kingdom was unaffected by this problem, as the 
retriangulation of Great Britain (1936-62) had been done in meters.

The United States survey foot is defined as exactly 1200/3937 meter, 
approximately 0.3048006096 m.[

-- 
These are my opinions.  I hate spam.



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[time-nuts] BBC Precision: Measure of All Things

[Doug Calvert]

The BBC recently did a three part series titled Precisoin: The Measure
of All Things.

Part 1 is Time and Distance
Part 2 Mass and Moles
Part 3 Is Heat, Light and Electricity

Probably nothing ground breaking for any time nuts but may be
interesting to watch with friends and amily.

http://www.bbc.co.uk/programmes/b02xbjmf
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Re: [time-nuts] OT Prototype Boards

[J. Forster]

Magnus,

There WERE (past tense) a number of definitions of the inch, ranging from
lines on bars of PtIr to a string of grain kernels.

Now there IS (present tense) one, defined as 2.54 cm.

-John




> John,
>
> On 06/25/2013 07:52 PM, J. Forster wrote:
>> No. It's THE definition...  there is only one.
>>
>> It's not like Pi, which equals 3 for small circles.
>
> Inches comes in many lengths, these are just a little over 2 ppm apart
> from each other.
>
> In 1893 the Mendenhall Order had the US shift from from using british
> definitions to metric definitions the rule, those making the 1866 metric
> act only the translation table to the now derivate unit of US Inch, as
> opposed to the later defined international inch.
>
> What a mess, what a mess.
>
> Cheers,
> Magnus
> ___
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>
>


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[time-nuts] GPS receivers W/timing outputs greater than 1PPS

[Mike M]

  Mark C. Stephens
  Wed Jun 26 10:12:53 EDT 2013

  > RDR have some fantastic stuff.

  > But they won't ship outside of USA.

  > I have  tried everything but according to Mark  Cole  the manager,
  > "The loss  of  time  and   the  additional  risk  of international
  > shipping doesn't fit with our business profile"

  I don't  know  why   they   think   there  is  additional  risk with
  international shipments. Just send it with a signature required, and
  it has exactly the same risk as any ordinary shipment in the US. But
  a lot of vendors feel the same way.

  If you are in Canada, you can have them ship to a forwarder who will
  then ship  it across the border for you. Of course,  they  add their
  extra charge for the service.

  If you  are  outside the US and would like to  get  a  M12+, fluke.l
  sells them for $35.00 plus shipping. See

  Motorola ONCORE M12+T timing gps receiver 1pps 100hz

  http://www.ebay.com/itm/290656401551

  I have  dealt with fluke.l for many years. His stuff is of  the very
  highest quality  and  he checks it  carefully  before  shipment. His
  prices are a bit higher than some others, but other vendors may ship
  you worthless junk like tool_nerd.

  fluke.l has  the  lab equipment and experience to  know  what  he is
  doing and  ships only the highest quality stuff. See  his  web store
  for example of his lab setup.

  But under no circumstance ever buy anything on eBay from tool_nerd.

  They ship  junk that has been badly abused. They failed  to  warn me
  that I had to modify a FE-5680A Rubidium oscillator in order  to get
  access to  the variable frequency output. Not only was this  a large
  amount of  work  to  drill all the  rivets  out,  it  risked getting
  shavings inside  the unit when drilling the case for  the  coax. The
  unit arrived  with deep gouges in the cover, indicating it  had been
  treated very badly.

  I told them I would not accept such crap, and wanted to send it back
  for refund.  They said OK, they would refund the entire  amount when
  it arrived.  I sent it to the exact address they gave  me,  and they
  refused to acknowledge receipt. In fact, they stopped replying to my
  emails when  it arrived. So I am out the $83.00 for  the  unit, plus
  the $20.00 postage. It would have cost far too much to send  it with
  a signature  required, but they convinced me they  were  very honest
  and would honor the agreement.

  I should  have never wasted my time and money. Don't  make  the same
  mistake.

  Regards,

  Mike M
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Re: [time-nuts] OT Prototype Boards

[Magnus Danielson]

John,

On 06/25/2013 07:52 PM, J. Forster wrote:

No. It's THE definition...  there is only one.

It's not like Pi, which equals 3 for small circles.


Inches comes in many lengths, these are just a little over 2 ppm apart 
from each other.


In 1893 the Mendenhall Order had the US shift from from using british 
definitions to metric definitions the rule, those making the 1866 metric 
act only the translation table to the now derivate unit of US Inch, as 
opposed to the later defined international inch.


What a mess, what a mess.

Cheers,
Magnus
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Re: [time-nuts] RDR

[lstoskopf]

 Used to buy direct.  Now seem directed to eBay.  Wonder if that simply isn't 
easier for them.  N0UU
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Re: [time-nuts] Austron 2100 HPIB/GPIB/IEE-488 cards

[GandalfG8]

Hi Iain,
 
There's probably not too many of these floating about but it's a very  
straightforward circuit and the Motorola ICs are still available on Ebay, 
albeit 
 probably all recycled, so building one on Veroboard or similar shouldn't 
be  difficult.
 
There's no programmable devices in the interface circuit and the manual  
instructions for retro-fitting are just plug and go so the standard 2100  
firmware must contain what it needs for the GPIB interface.
 
Regards
 
Nigel
GM8PZR
 
 
In a message dated 26/06/2013 21:29:53 GMT Daylight Time, i...@g7iii.net  
writes:

Hi  Folks,

Having recently acquired two Austron 2100 Timing Receivers  which
did not have the GPIB/HPIB/IEEE-488/whatever you wish to call  it
cards in, I was wondering if any time-nuts had any hanging  around
that they wanted to dispose of ?

If so, let me know off list,  I'm certainly interested in two (esp
as I'm currently hoping cleaning the  switch contacts with
isopropyl alcohol will make them function properly  again)

Having HPIB would get around the problem if the cleansing  fails
and remote command and control would be very useful  anyway


All the  Best

Iain
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Re: [time-nuts] Austron 2100 HPIB/GPIB/IEE-488 cards

[paul swed]

Been looking for  card at a reasonable cost for a long time.
Do agree it would be useful to pull data from the 210.
Regards
Paul.


On Wed, Jun 26, 2013 at 4:23 PM, Iain Young  wrote:

> Hi Folks,
>
> Having recently acquired two Austron 2100 Timing Receivers which
> did not have the GPIB/HPIB/IEEE-488/whatever you wish to call it
> cards in, I was wondering if any time-nuts had any hanging around
> that they wanted to dispose of ?
>
> If so, let me know off list, I'm certainly interested in two (esp
> as I'm currently hoping cleaning the switch contacts with
> isopropyl alcohol will make them function properly again)
>
> Having HPIB would get around the problem if the cleansing fails
> and remote command and control would be very useful anyway
>
>
> All the Best
>
> Iain
> __**_
> 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.
>
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[time-nuts] Austron 2100 HPIB/GPIB/IEE-488 cards

[Iain Young]

Hi Folks,

Having recently acquired two Austron 2100 Timing Receivers which
did not have the GPIB/HPIB/IEEE-488/whatever you wish to call it
cards in, I was wondering if any time-nuts had any hanging around
that they wanted to dispose of ?

If so, let me know off list, I'm certainly interested in two (esp
as I'm currently hoping cleaning the switch contacts with
isopropyl alcohol will make them function properly again)

Having HPIB would get around the problem if the cleansing fails
and remote command and control would be very useful anyway


All the Best

Iain
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Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K,

[Azelio Boriani]

12 minutes are enough to receive the data... another strange thing is
that you have the 1PPS TI always 0. Have you already given the
:SYST:PRES command to preset the receiver to the factory settings?

On Wed, Jun 26, 2013 at 6:13 PM, Mark C. Stephens  wrote:
> Hi Azelio, err...
>
>
> E-113>:syst:stat?
> [ Unlocked ] -- GPSR 2 Status 
> SYNCHRONIZATION ... [ Outputs Valid/Reduced Accuracy ]
> SmartClock Mode _Reference OutPuts ___
>Locked to GPS TFOM 3  FFOM3
>Recovery  1PPS TI  +0 ns
>Holdover  HOLD THR
>>> Power-up: OCXO Warm-upHoldover Uncertainty_
>  Predict
>
> ACQUISITION ... [ GPS 1PPS Valid ]
> Tracking: 6   Not Tracking: 0Time 
> PRN  El  Az  C/N   PRN  El  Az   LOCL GPS 02:10:05 27 Jun 2013
>   70   0   39GPS 1PPS  Synchronized to GPS
>   80   0   50ANT DLY  28 ns
>   90   0   52Position 
>  150   0   44MODE Survey:   1.3% complete
>  170   0   49
>  240   0   39AVG LAT  S  33:45:49.689
>  AVG LON  E 151:05:31.705
>  AVG HGT  +131.66 m  (MSL)
> ELEV MASK 10 deg
> HEALTH MONITOR  [ OK ]
> Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
> Alarms:(none)
>
>
>
>
> They are all zero now!
> I have just changed eman to 10 and rebooted.
> I guess it must be something to do with almanac,
> perhaps being patient and waiting a day or 3 may yield a change.
> Hopefully for the better.
>
>
> marki
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On 
> Behalf Of Azelio Boriani
> Sent: Wednesday, 26 June 2013 7:09 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed 
> as not O/K,
>
> Try to put the elevation mask to 10degrees, not 25 :GPS:SAT:TRAC:EMAN 10
>
> On Tue, Jun 25, 2013 at 8:41 AM, Mark C. Stephens  
> wrote:
>> I have a GPSR2 with unusual; GPS behaviour.
>>
>> E-113>:syst:stat?
>> [ Active ]  GPSR 2 Status
>>  SYNCHRONIZATION ... 
>> [ Outputs Valid/Reduced Accuracy ]
>> SmartClock Mode _Reference OutPuts 
>> ___
 Locked to GPS TFOM 3  FFOM0
>>Recovery  1PPS TI  +0 ns
>>Holdover  HOLD THR
>>Power-up  Holdover 
>> Uncertainty_
>>  Predict
>>
>> ACQUISITION ... [ GPS 1PPS Valid 
>> ]
>> Tracking: 5   Not Tracking: 7Time 
>> 
>> PRN  El  Az  C/N   PRN  El  Az   GPS  06:37:39 25 Jun 
>> 2013
>>   10   0   493  Not OK   GPS 1PPS  Synchronized to GPS
>> 110   0   476  Not OK   ANT DLY  28 ns
>> 14   25 349   43   15  Not OK   Position 
>> 310   0   49   18  Not OK   MODE Hold
>> 320   0   47   21  Not OK
>> 22  Not OK   LAT  S  33:45:49.374
>> 27  Not OK   LOG  E 151:05:31.495
>>  HGT  +118.61 m  
>> (MSL)
>> ELEV MASK 25 deg
>> HEALTH MONITOR  [ OK 
>> ]
>> Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
>> Alarms:(none)
>>
>>
>> As you can see the Azimuth and elevation are zero.
>>
>> Group opinion please, bad antenna connector or bad GPS module?
>>
>>
>> -marki
>> ___
>> 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.
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>
>
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Re: [time-nuts] inch/mm conversion

[Hal Murray]

msu...@woh.rr.com said:
> You need to include all the text in that link through  the 29.  Copy to a
> text editor, remove any carriage returns, then paste into your browser. 

I got a 404 with the URL including the %29.

It worked when I copied the URL to my browser and changed the %28 to ( and 
the %29 to ), so I'm guessing that your browser does % conversion and mine 
(old Firefox) doesn't.

---

http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-
to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if
-so-when-%28faq-length%29


-- 
These are my opinions.  I hate spam.



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Re: [time-nuts] RDR Electronics

[Bob Camp]

Hi

I've bought multiple items from RDR over the years. Everything I've gotten
from them has been first rate. 

Bob

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Perry Sandeen
Sent: Wednesday, June 26, 2013 12:04 PM
To: time-nuts@febo.com
Subject: [time-nuts] RDR Electronics

List,

Wrote: But do they have a actual website. I did not
find one or a webstore? How is it you even knew they had the items??
 
1.  This is
what I found on  google search:
 
RDR Electronics Inc
www.rdrelectronics.com/?
RDR Electronics Inc. 7045 S. Fulton St. #230.
Centennial, CO 80112. Voice 303-790-1830. Fax 303-790-1343. If you would
like
to see what we are selling on ...
 
RDR Electronics - eBay Stores
stores.ebay.com › eBay Stores?
40+ items – Buy RDR Electronics, Industrial
Equipment items on eBay.
Nortel Trimble NTBW50AA GPSTM 10MHz Oscillator
GPSDO +
Alvarion AN1095 12" Flat Panel Patch Antenna
2.4-2.7 GH
 
2.  I found
them several years ago when I was looking for gps equipment on Ebay.
 
3.  At least
one of the owners/workers is on the list and has contributed a technical
article.  He is extremely discreet about it. 
 
Regards,
 
Perrier









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Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K,

[Mark C. Stephens]

Hi Azelio, err...


E-113>:syst:stat?
[ Unlocked ] -- GPSR 2 Status 
SYNCHRONIZATION ... [ Outputs Valid/Reduced Accuracy ]
SmartClock Mode _Reference OutPuts ___
   Locked to GPS TFOM 3  FFOM3
   Recovery  1PPS TI  +0 ns
   Holdover  HOLD THR
>> Power-up: OCXO Warm-upHoldover Uncertainty_
 Predict

ACQUISITION ... [ GPS 1PPS Valid ]
Tracking: 6   Not Tracking: 0Time 
PRN  El  Az  C/N   PRN  El  Az   LOCL GPS 02:10:05 27 Jun 2013
  70   0   39GPS 1PPS  Synchronized to GPS
  80   0   50ANT DLY  28 ns
  90   0   52Position 
 150   0   44MODE Survey:   1.3% complete
 170   0   49
 240   0   39AVG LAT  S  33:45:49.689
 AVG LON  E 151:05:31.705
 AVG HGT  +131.66 m  (MSL)
ELEV MASK 10 deg
HEALTH MONITOR  [ OK ]
Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
Alarms:(none)




They are all zero now!
I have just changed eman to 10 and rebooted.
I guess it must be something to do with almanac, 
perhaps being patient and waiting a day or 3 may yield a change.
Hopefully for the better.


marki

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Azelio Boriani
Sent: Wednesday, 26 June 2013 7:09 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed as 
not O/K, 

Try to put the elevation mask to 10degrees, not 25 :GPS:SAT:TRAC:EMAN 10

On Tue, Jun 25, 2013 at 8:41 AM, Mark C. Stephens  wrote:
> I have a GPSR2 with unusual; GPS behaviour.
>
> E-113>:syst:stat?
> [ Active ]  GPSR 2 Status 
>  SYNCHRONIZATION ... 
> [ Outputs Valid/Reduced Accuracy ]
> SmartClock Mode _Reference OutPuts ___
>>> Locked to GPS TFOM 3  FFOM0
>Recovery  1PPS TI  +0 ns
>Holdover  HOLD THR
>Power-up  Holdover Uncertainty_
>  Predict
>
> ACQUISITION ... [ GPS 1PPS Valid ]
> Tracking: 5   Not Tracking: 7Time 
> PRN  El  Az  C/N   PRN  El  Az   GPS  06:37:39 25 Jun 2013
>   10   0   493  Not OK   GPS 1PPS  Synchronized to GPS
> 110   0   476  Not OK   ANT DLY  28 ns
> 14   25 349   43   15  Not OK   Position 
> 310   0   49   18  Not OK   MODE Hold
> 320   0   47   21  Not OK
> 22  Not OK   LAT  S  33:45:49.374
> 27  Not OK   LOG  E 151:05:31.495
>  HGT  +118.61 m  (MSL)
> ELEV MASK 25 deg
> HEALTH MONITOR  [ OK ]
> Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
> Alarms:(none)
>
>
> As you can see the Azimuth and elevation are zero.
>
> Group opinion please, bad antenna connector or bad GPS module?
>
>
> -marki
> ___
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[time-nuts] RDR Electronics

[Perry Sandeen]

List,

Wrote: But do they have a actual website. I did not
find one or a webstore? How is it you even knew they had the items??
 
1.  This is
what I found on  google search:
 
RDR Electronics Inc
www.rdrelectronics.com/‎
RDR Electronics Inc. 7045 S. Fulton St. #230.
Centennial, CO 80112. Voice 303-790-1830. Fax 303-790-1343. If you would like
to see what we are selling on ...
 
RDR Electronics - eBay Stores
stores.ebay.com › eBay Stores‎
40+ items – Buy RDR Electronics, Industrial
Equipment items on eBay.
Nortel Trimble NTBW50AA GPSTM 10MHz Oscillator
GPSDO +
Alvarion AN1095 12" Flat Panel Patch Antenna
2.4-2.7 GH
 
2.  I found
them several years ago when I was looking for gps equipment on Ebay.
 
3.  At least
one of the owners/workers is on the list and has contributed a technical 
article.  He is extremely discreet about it. 
 
Regards,
 
Perrier









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Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K,

[Azelio Boriani]

Try to put the elevation mask to 10degrees, not 25
:GPS:SAT:TRAC:EMAN 10

On Tue, Jun 25, 2013 at 8:41 AM, Mark C. Stephens  wrote:
> I have a GPSR2 with unusual; GPS behaviour.
>
> E-113>:syst:stat?
> [ Active ]  GPSR 2 Status 
> SYNCHRONIZATION ... [ Outputs Valid/Reduced Accuracy ]
> SmartClock Mode _Reference OutPuts ___
>>> Locked to GPS TFOM 3  FFOM0
>Recovery  1PPS TI  +0 ns
>Holdover  HOLD THR
>Power-up  Holdover Uncertainty_
>  Predict
>
> ACQUISITION ... [ GPS 1PPS Valid ]
> Tracking: 5   Not Tracking: 7Time 
> PRN  El  Az  C/N   PRN  El  Az   GPS  06:37:39 25 Jun 2013
>   10   0   493  Not OK   GPS 1PPS  Synchronized to GPS
> 110   0   476  Not OK   ANT DLY  28 ns
> 14   25 349   43   15  Not OK   Position 
> 310   0   49   18  Not OK   MODE Hold
> 320   0   47   21  Not OK
> 22  Not OK   LAT  S  33:45:49.374
> 27  Not OK   LOG  E 151:05:31.495
>  HGT  +118.61 m  (MSL)
> ELEV MASK 25 deg
> HEALTH MONITOR  [ OK ]
> Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
> Alarms:(none)
>
>
> As you can see the Azimuth and elevation are zero.
>
> Group opinion please, bad antenna connector or bad GPS module?
>
>
> -marki
> ___
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[time-nuts] GPS receivers W/timing outputs greater than 1PP

[Arthur Dent]

>But do they have a actual website. I did not find one or a webstore?
>How is it you even knew they had the items??
>Thanks
>Paul

I have bought many items from them and have always been satisfied 
with the items I've bought and their service. They sell on Ebay 
and that is where their 'store' is. Try this link:

http://stores.ebay.com/RDR-Electronics?_trksid=p2047675.l2563 

-Arthur
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Re: [time-nuts] Fwd: inch/mm conversion

[Nic McLean]

Thanks,
Nic

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Erno Peres
Sent: Wednesday, 26 June 2013 11:27 PM
To: time-nuts@febo.com
Subject: [time-nuts] Fwd: inch/mm conversion





http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-
to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if
-so-when-(faq-length) 





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Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS

[paul swed]

But do they have a actual website. I did not find one or a webstore?
How is it you even knew they had the items??
Thanks
Paul


On Wed, Jun 26, 2013 at 10:12 AM, Mark C. Stephens wrote:

> RDR have some fantastic stuff.
> But they won't ship outside of USA.
> I have tried everything but according to Mark Cole the manager,
> "The loss of time and the additional risk of international shipping
> doesn't fit with our business profile"
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of paul swed
> Sent: Wednesday, 26 June 2013 10:56 PM
> To: Perry Sandeen; Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS
>
> Boy thats strange they don't have a website. So how did you ever find out
> they had rcvrs?
> Funny I was less then 2 miles away last week. Had never heard of them.
> Regards
> Paul
> WB8TSL
>
>
> On Tue, Jun 25, 2013 at 11:28 PM, Perry Sandeen 
> wrote:
>
> > List,
> >
> > RDR electronics in Colorado has Motorola M12+ OnCore GPS Timing
> > Receiver 3V 1pps 100Hz for $20.
> >
> > They also have other GPS units.  Cheaper than chicoms and guaranteed.
> > Stock varies so check from time to time if you don't see what you need.
> >
> > I'm a multiple happy camper customer.
> >
> > Regards,
> >
> > Perrier
> > ___
> > 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.
> >
> ___
> 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.
>
>
> ___
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>
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Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS

[Mark C. Stephens]

RDR have some fantastic stuff.
But they won't ship outside of USA.
I have tried everything but according to Mark Cole the manager, 
"The loss of time and the additional risk of international shipping doesn't fit 
with our business profile"

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of paul swed
Sent: Wednesday, 26 June 2013 10:56 PM
To: Perry Sandeen; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS

Boy thats strange they don't have a website. So how did you ever find out they 
had rcvrs?
Funny I was less then 2 miles away last week. Had never heard of them.
Regards
Paul
WB8TSL


On Tue, Jun 25, 2013 at 11:28 PM, Perry Sandeen  wrote:

> List,
>
> RDR electronics in Colorado has Motorola M12+ OnCore GPS Timing 
> Receiver 3V 1pps 100Hz for $20.
>
> They also have other GPS units.  Cheaper than chicoms and guaranteed.
> Stock varies so check from time to time if you don't see what you need.
>
> I'm a multiple happy camper customer.
>
> Regards,
>
> Perrier
> ___
> 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.
>
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Re: [time-nuts] inch/mm conversion

[Bob Stewart]

In fact, if you just copy through the word "when", it works without any 
cutting, pasting, or editing.




- Original Message -
> From: Mike Suhar 
> To: time-nuts@febo.com
> Cc: 
> Sent: Wednesday, June 26, 2013 8:00 AM
> Subject: Re: [time-nuts] inch/mm conversion
> 
> You need to include all the text in that link through  the 29.  Copy to a 
> text 
> editor, remove any carriage returns, then paste into your browser.
> 
>  Original message 
> Subject: Re: [time-nuts] inch/mm conversion
> From: Nic McLean 
> To: 'Discussion of precise time and frequency measurement' 
> 
> CC: Re: [time-nuts] inch/mm conversion
> 
> I get error 404 page not found on that link.
> Nic
> VK2KXN
> 
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Stephen Tompsett
> Sent: Wednesday, 26 June 2013 6:20 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] inch/mm conversion
> 
> FYI
> 
> http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-
> to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if
> -so-when-%28faq-length%29
> 
> --
> Stephen Tompsett
> 
> ___
> 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.
> 
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Re: [time-nuts] inch/mm conversion

[Stephen Tompsett]

Something strange happens when copying the URL of the page, sorry.

Visit npl.co.uk and use the 'Search NPL'  using the terms 'inch mm'


On 26/06/2013 11:01, Nic McLean wrote:
> I get error 404 page not found on that link.
> Nic
> VK2KXN
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Stephen Tompsett
> Sent: Wednesday, 26 June 2013 6:20 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] inch/mm conversion
>
> FYI
>
> http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-
> to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if
> -so-when-%28faq-length%29
>
> --
> Stephen Tompsett
>
> ___
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> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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-- 
Stephen Tompsett

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Re: [time-nuts] inch/mm conversion

[Mike Suhar]

You need to include all the text in that link through  the 29.  Copy to a text 
editor, remove any carriage returns, then paste into your browser.

 Original message 
Subject: Re: [time-nuts] inch/mm conversion
From: Nic McLean 
To: 'Discussion of precise time and frequency measurement' 
CC: Re: [time-nuts] inch/mm conversion

I get error 404 page not found on that link.
Nic
VK2KXN

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stephen Tompsett
Sent: Wednesday, 26 June 2013 6:20 PM
To: time-nuts@febo.com
Subject: [time-nuts] inch/mm conversion

FYI

http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-
to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if
-so-when-%28faq-length%29

--
Stephen Tompsett

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Re: [time-nuts] GPS receivers W/timing outputs greater than 1PPS

[paul swed]

Boy thats strange they don't have a website. So how did you ever find out
they had rcvrs?
Funny I was less then 2 miles away last week. Had never heard of them.
Regards
Paul
WB8TSL


On Tue, Jun 25, 2013 at 11:28 PM, Perry Sandeen  wrote:

> List,
>
> RDR electronics in Colorado has Motorola M12+ OnCore
> GPS Timing Receiver 3V 1pps 100Hz for $20.
>
> They also have other GPS units.  Cheaper than chicoms and guaranteed.
> Stock varies so check from time to time if you don't see what you need.
>
> I'm a multiple happy camper customer.
>
> Regards,
>
> Perrier
> ___
> 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.
>
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Re: [time-nuts] 60 KHz receivers

[J. Forster]

Do the stations they are designed to receive transmit BPSK?

-John

==


> went to pv electronics direct. They are reasonably priced. But they don't
> give the detail needed. I am pretty sure these are the old cmax or temic
> chips. Since I don't have one can't really tell you.
> Regards
> Paul
> WB8TSL
>
>
> On Tue, Jun 25, 2013 at 10:44 PM, paul swed  wrote:
>
>> I looked and did not see the radio
>> As to could it work yes. You might have to invert the data.
>> Regards
>> Paul
>> WB8TSL
>>
>>
>> On Tue, Jun 25, 2013 at 10:35 PM, Perry Sandeen
>> wrote:
>>
>>>
>>>
>>>
>>>
>>> 
>>> List,
>>>
>>> On Ebay I stumbled upon a site called pv. electronics from England
>>>
>>> The site offers a 60 KHz SYMTRIK Radio Time Receiver
>>> Module W/100 MM Antenna for $25 delivered.  I don't know if this will
>>> work with Paul Sweed's circuits or not.
>>>
>>> It looks like the stuff Digi-Key used to carry made by IIRC C-SPAN.
>>>
>>> One can also get modules for the GB and German time transmissions.
>>>
>>> HTH someone.
>>>
>>> Regards,
>>>
>>> Perrier
>>> ___
>>> 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.
>>>
>>
>>
> ___
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> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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>
>


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Re: [time-nuts] inch/mm conversion

[Nic McLean]

I get error 404 page not found on that link.
Nic
VK2KXN

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stephen Tompsett
Sent: Wednesday, 26 June 2013 6:20 PM
To: time-nuts@febo.com
Subject: [time-nuts] inch/mm conversion

FYI

http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-
to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if
-so-when-%28faq-length%29

--
Stephen Tompsett

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Re: [time-nuts] Spectracom 8164 Hack?

[John Ackermann N8UR]

That's the output freq of the "standard output" on the front panel.  The RX is 
60 kHz only.

John

On Jun 25, 2013, at 10:27 PM, Perry Sandeen  wrote:

> List,  There are several Spectracom 8164 receiver available on Ebay.
> 
> My question: on the front panel bank of frequency selection switches, the 
> left hand switch is marked .1MHz.  Is that really a 100 KHz (for LORAN) 
> setting or is it really tuned to WWVB?
> 
> If it truly is tuned to 100KHz can it be hacked to 60KHz in a reasonably 
> practical manor?
> 
> Regards,
> 
> Perrier
> 
> 
> 
> 
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[time-nuts] inch/mm conversion

[Stephen Tompsett]

FYI

http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if-so-when-%28faq-length%29

-- 
Stephen Tompsett

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[time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K,

[Mark C. Stephens]

I have a GPSR2 with unusual; GPS behaviour.

E-113>:syst:stat?
[ Active ]  GPSR 2 Status 
SYNCHRONIZATION ... [ Outputs Valid/Reduced Accuracy ]
SmartClock Mode _Reference OutPuts ___
>> Locked to GPS TFOM 3  FFOM0
   Recovery  1PPS TI  +0 ns
   Holdover  HOLD THR
   Power-up  Holdover Uncertainty_
 Predict

ACQUISITION ... [ GPS 1PPS Valid ]
Tracking: 5   Not Tracking: 7Time 
PRN  El  Az  C/N   PRN  El  Az   GPS  06:37:39 25 Jun 2013
  10   0   493  Not OK   GPS 1PPS  Synchronized to GPS
110   0   476  Not OK   ANT DLY  28 ns
14   25 349   43   15  Not OK   Position 
310   0   49   18  Not OK   MODE Hold
320   0   47   21  Not OK
22  Not OK   LAT  S  33:45:49.374
27  Not OK   LOG  E 151:05:31.495
 HGT  +118.61 m  (MSL)
ELEV MASK 25 deg
HEALTH MONITOR  [ OK ]
Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
Alarms:(none)


As you can see the Azimuth and elevation are zero.

Group opinion please, bad antenna connector or bad GPS module?


-marki
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Re: [time-nuts] Spectracom 8164 Hack?

[GandalfG8]

Hi Perrier
 
It's a WWVB receiver, not Loran, with a built in phase comparator,  hence 
the strip chart, that can be used to compare its own oscillator or a  local 
input with WWVB, and is another unit affected by the WWVB changes.
 
Those switches on the front panel select an output frequency  provided by 
internal dividers.
 
Manual here.
 
http://www.spectracomcorp.com/Support/HowCanWeHelpYou/Library/tabid/59/Defau
lt.aspx?EntryId=123
 
However, the 8164 does have some limitations as highlighted in John  
Ackerman's very interesting observations here.
 
http://www.febo.com/time-freq/wwvb/spectracom/
 
Regards
 
Nigel
GM8PZR
 
 
 
In a message dated 26/06/2013 03:31:03 GMT Daylight Time,  
sandee...@yahoo.com writes:

List,  There are several Spectracom 8164 receiver available on  Ebay.

My question: on the front panel bank of frequency selection  switches, the 
left hand switch is marked .1MHz.  Is that really a 100 KHz  (for LORAN) 
setting or is it really tuned to WWVB?

If it truly is tuned  to 100KHz can it be hacked to 60KHz in a reasonably 
practical  manor?

Regards,

Perrier




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