date:20120415


On 4/15/12 3:46 AM, Attila Kinali wrote:

On Sat, 14 Apr 2012 20:11:14 -0500
h...@hiwaay.net wrote:


CA3130EZ is the lead-free version of the part.  Looks like good stock
(both Newark and Avnet have thousands on the shelf), and should be
usable unless you're sending it into space or something.


Why is the chip case being lead free a problem for space?
I thought the major issue was that the solder is lead free and
showes all kinds of nasty behaviour?

Attila Kinali



Tin whiskers

Rather than tin-lead solder dip, it's typically pure tin on the leads, 
and that's evil.  You can take the part and redip the leads, but that's 
a pain.



Yeah, the solder requires better temperature control, but most stuff for 
space is done with automated processes and dialing in the temperature 
profiles for arbitrary solder isn't that hard.


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[time-nuts] T-bolt steering an LPRO...?

2012-04-15 Thread Michael Baker


Time-nutters--

Some time ago I queried the list for info on how to connect
and steer an LPRO-101  Rb oscillator with a T-bolt.   Now that
I am ready to start on that project I can't find the responses I
got from the list.

 I apologize for this repeat of my original query but it is not
my fault--  Mice sneak in at night and mess with my computer
and lose my saved files  (that's my story and I am sticking
with it!).

Thanks (again) for any feedback on this!!

Mike Baker
-

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Re: [time-nuts] WWVB phase-modulation test

2012-04-15 Thread Scott McGrath

HP117a unlocked in grid FN43

Sent from my iPhone

On Apr 15, 2012, at 1:01 AM, Kevin Rosenberg ke...@rosenberg.net wrote:

 On Apr 14, 2012, at 10:45 PM, Shaun Merrigan wrote:
 Just wondering if anyone on the list is monitoring their WWVB gear at the
 moment?  I got in a bit late, but I have been recording my 8170 since about
 0300 and it has remained locked.  QTH here is about 1500km north of Ft.
 Collins.
 
 I've been monitoring my Spectracom 8182. It's been unlocked since 0100,
 about 1000km south of Ft. Collins.
 
 Kevin
 
 
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Re: [time-nuts] Antenna restrictions [was Lucent 40 dB Antenna]

2012-04-15 Thread gary


The dummy pipe would be fine.

In theory ABS makes a good radome, but in practice whatever you get at 
the hardware store effects antennas significantly. [ABS and PVC is the 
first thing that comes to mind when weather proofing home made 
antennas.] The AWACS uses S-2 glass for it's radome. The dielectric 
constant is worse than ABS, but perhaps when the dust settles, the S-2 
glass can be thinner that ABS for the same strength. So perhaps in 
practice it is a better radome.


S-2 glass is off the shelf if you have a Tap Plastics handy. S-2 tube 
forms are easy to make with a cardboard tube and some mylar. The result 
is a beige tube that is somewhat translucent.


I haven't shot mine to test out the ballistic properties.


On 4/15/2012 5:41 AM, Chuck Harris wrote:

Yes, but you GPS antenna surely would notice the infusion
with various fumes and chemicals that come from the vent
pipe. Remember, the vent is open to the sewer, its purpose
is to prevent pressure build up in the sewer from blowing
(or sucking) the water out of the various traps and letting
sewer gas into the house.

However, one could add a dummy plumbing vent to the roof
without anyone noticing.

-Chuck Harris

Chris Albertson wrote:

On Sat, Apr 14, 2012 at 11:01 PM, Perry Sandeensandee...@yahoo.com
wrote:




Esteemed Time-nutters

The religious answer.

1. Install antenna in as inconspicuous location as possible.



A GPS timing antenna should fit INSIDE a 4 plumbing vent. The ABS
plastic
pipe will not effect the GPS signals. Some houses will have a 4 vent
pipe, most will be smaller but it is easy to slip a larger diameter pipe
over a small one. Buy a 30 inch length of 4 black ABS drain pipe and
simply drop it on to of any smaller vent pipe. No one would ever notice
and your plumbing system will not notice either.


Chris Albertson
Redondo Beach, California
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[time-nuts] HP Z3801A GPS Receiver

2012-04-15 Thread Merv Thomas


My Unit comes up with an INVALID EFC +0 when switched on and never tracks
any satellites.

ALL other indicators(using GPS Control s/ware)say all is well including the
EFC!!

The EFC Volts read 19.029% or Absolute N value of 624056 so it is not near
the end of it's EFC range.

Anyone who has similar experience could possibly suggest a solution?

Merv


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Re: [time-nuts] Programming FE-5680A software‏ and wiring information.

2012-04-15 Thread Graham / KE9H


Ken:

Please send me the program and wiring documentation.
I have two of the FE-5680A's that this would help adjust.

Thanks,
--- Graham / KE9H

==

On 4/14/2012 10:44 PM, Ken Kubick wrote:







Here is more information on FE-5680 and a good program for reprogramming.  I 
got this from nichgeek on ebay.  The program is in both chinease and english 
with chinease being the default.  The program comes up with button lables as 
question marks.  In order to change to english go to the lower left button and 
click on the little down arrow and select ENGLISH.  The rest is self 
explanitory.  Anyone interested email me and I will email you the program and 
wiring documentation.

Ken Kubick

kenkub...@hotmail.com

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Re: [time-nuts] Opinion Of Attached - Possible HPSDR GPSDO 'Engine'

2012-04-15 Thread Ed Palmer


Hi Ulrich,

I agree with your comments.  I've seen the issues that can occur when 
serial echo is set wrong.


However, the GPSTCXO has an additional issue.  Serial echo can actually 
cause the unit to reboot.  This means that it loses whatever it's 
learned about the oscillator and reverts to it's default values.  
Performance suffers until it has relearned the oscillator's unique 
characteristics.


Ed


On 4/15/2012 6:13 AM, Ulrich Bangert wrote:

Ed,


- If you use Z38XX to communicate with the GPSTCXO be sure to disable
serial echo as described in the manual.  The GPSTCXO _really_ doesn't
like serial echo.  It can cause the unit to reboot.

as the author of the mentioned Z38XX I would like to clarify this claim. If
serial echo is enabled then the GPSTCXO is the SOURCE of the serial echo and
echoes every single character sent by Z38XX. This worries Z38XX a lot
because it expects to put forward a question to the device and then to
receive an answer to that question. It does not expect to receive its own
question and for that reason it takes the echoed question as the answer
sometimes.

The problem is the sometimes because the next time the correct answer may
be read. Whenever you get the impression that the communication with a GPSDO
is kind of unstable with Z38XX you should give the serial echo the first
check. That applies to ALL GPSDOs and not only the GPSTCXO. The GPSTCXO was
the first device to notice this fact because the default for the serial echo
seems to be On which is a handy feature when you use a common terminal
program for communication.

Best regards
Ulrich Bangert


-Ursprungliche Nachricht-
Von: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] Im Auftrag von Ed Palmer
Gesendet: Sonntag, 15. April 2012 07:18
An: Discussion of precise time and frequency measurement
Betreff: Re: [time-nuts] Opinion Of Attached - Possible HPSDR
GPSDO 'Engine'


I recently had a chance to look at the GPSTCXO.  I was quite
impressed.
It's performance is a lot better than any bare GPS receiver,
but maybe
not as good as some GPSDOs.

Here are some measurements that I made on the 1 PPS of the
GPSTCXO and
other GPSDOs:

GPSTCXO  Std. Dev.  400 ps. min-max range  4 ns.
Tbolt   500 ps. . ~ 4 ns.
Z3801A ...  300 ps. . ~ 2 ns.
Z3817A ...  100 ps. .  1 ns.

These measurements were 1000 pulses or more measured with an
HP 5372A or
5370B for the Z3817A.  The Z3817A requires an external 1 PPS
source to
lock to.  I used a Navsync CW12-wi.  Over longer periods of
time typical
GPS wander is present in all units.

I measured the 10 MHz output of the GPSTCXO with the Histogram Time
Interval function of my 5372A.  Out of 200 million cycles,
every one had
a period of either 100.0 or 100.2 ns.  There wasn't even one
outlier.  I
have OCXOs that aren't nearly that good.

A few random points to remember about the GPSTCXO:
- There's no way to set the time zone offset - fixed at UTC.
- There's no way to set the elevation mask - fixed at 10 degrees.
- The Allen Deviation matched the graph in the manual which
is available
at the Jackson Labs site.
- On the evaluation board, the 1 PPS is wired to the DCD
lead on the
USB-emulated serial port.
- I can confirm that, as mentioned in the manual, performance
improves
substantially when you shield the unit from temperature fluctuations.
- If you use Z38XX to communicate with the GPSTCXO be sure to disable
serial echo as described in the manual.  The GPSTCXO _really_ doesn't
like serial echo.  It can cause the unit to reboot.

The GPSTCXO stands between a bare GPS timing receiver and a typical
GPSDO.  It's performance is closer to a GPSDO than to a GPS receiver,
but it's price is closer to the bare receiver than to the
price of a new
GPSDO.  It should be useful in many situations.

I have no relationship to Jackson Labs.  They did make a GPSTCXO
available to me for this testing.

Ed


On 4/14/2012 7:10 PM, John Westmoreland wrote:

Hello Fellow Time-Nuts,

I am new to the group - and was asked by someone from HPSDR/TAPR to
get an opinion, good/bad, of the attached PDF which I hope doesn't
exceed the allowable byte size of posts.

Jackson Labs has given me a verbal on the attached as sub $300.00 QTY 1.  We 
are seeing if there is interest in a possible 'bulk' buy.

I will post more on the HPSDR Wiki as soon as I sort out my password - and will 
post an e-mail regarding the other files associated with the GPSTCXO.

If there is sufficient interest we may do a spin of the HPSDR
Excalibur project or perhaps just do a new project with the attached device.  
It should be easy to interface directly to the Alex Bus in
the OpenHPSDR Architecture.

Thanks and 73's,
John W.
San Jose, CA
AJ6BC (Ham Call Sign)



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Re: [time-nuts] Antenna restrictions [was Lucent 40 dB Antenna]


On 4/15/12 6:20 AM, gary wrote:

The dummy pipe would be fine.

In theory ABS makes a good radome, but in practice whatever you get at
the hardware store effects antennas significantly. [ABS and PVC is the
first thing that comes to mind when weather proofing home made
antennas.] The AWACS uses S-2 glass for it's radome. The dielectric
constant is worse than ABS, but perhaps when the dust settles, the S-2
glass can be thinner that ABS for the same strength. So perhaps in
practice it is a better radome.



black ABS Drain/Waste/Vent (DWV) pipe is typically actually foam with a 
skin on the inside and outside, so it's pretty transparent and low 
epsilon, EXCEPT.. they use carbon black as the pigment.


PVC is something else to watch out for.  The outside is white (or grey 
or purple) but the inside might not be.  I was quite surprised when I 
was turning a piece of PVC pipe on a lathe and found the inside of the 
wall was a amazing variety of colors (hey, they recycle all manner of 
stuff, it's just ground up and extruded).


the microwave oven test might be appropriate (2.45GHz vs 1.5GHz).. put a 
chunk in the oven and see if it gets hot.  A cup of water somewhere if 
your oven needs a load.



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Re: [time-nuts] WWVB phase-modulation test

2012-04-15 Thread Jim Hickstein


psk fixer-uppers not working all that well. Back to the drawing boards as
they say.

My Spectracom 8170 was showing lock but not time sync, for a while last night, 
several hours.  Longer than usual, when it's just getting a grip.  (I didn't set 
up to record its outputs, alas!)  At other times, and this morning, it's just 
unlocked.


The 8164 has been unlocked throughout, as expected, and its strip-chart recorder 
shows the usual open-loop pattern.  When the test ends I should have a nice 
picture bracketing it.


My MFJ-133 clock is happy enough, as predicted.  The Junghans Mega seems to be. 
 It's harder to tell with the others, that only have hands and no direct 
indication of receiver state.


Interesting that the NIST's own monitoring stations 
(http://tf.nist.gov/tf-cgi/wwvbmonitor_e.cgi) variously show readable time 
codes, and highly atypical plots of relative field strength.  I wonder how 
they're measuring those.  Again, LaCrosse is the big loser on readability, for 
some reason.


I also finally hauled the spectrum analyzer (HP 141T/8552B/8553B) up from the 
basement, got together a DC block and a BNC tee, and tried to see what I could 
see.  Nothing.  60 kHz is mighty close to DC, on this thing.  Too close, 
evidently.  Perhaps I should be looking somewhere inside the 8164.


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Re: [time-nuts] T-bolt steering an LPRO...?

2012-04-15 Thread Hal Murray


mp...@clanbaker.org said:
 Some time ago I queried the list for info on how to connect and steer an
 LPRO-101  Rb oscillator with a T-bolt.   Now that I am ready to start on
 that project I can't find the responses I got from the list. 

All the list traffic is archived.

Google indexes it so searching will usually find what you are looking for.  
Including time-nuts in your search sometimes helps to narrow things down.

If you look at the full headers of any message to the list you will find 
something like this:
  List-archive: http://www.febo.com/pipermail/time-nuts
They are batched by month so it helps a lot to know roughly when the message 
you are looking for was sent.


-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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[time-nuts] LORAN-C at MIT

At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
was also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

Seems the stuff is hitting the skids.

-John






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[time-nuts] HP 5372A speed and stability

2012-04-15 Thread Dickson Fu

Hi all,
 
Does somebody know the speed and stability of HP 5372A Time Interval 
analyzer?   in terms of the number of digit per second.
Also, what's the standard built-in frequency reference?
 
Lastly, what's the max number of digit when performs as a frequency counter?
 
Thanks and Regards,
Dickson Fu
VR2WHF
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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Rob Kimberley

Silly thought, but do you know if the 2100F units sold or not. I'm
interested at that price as Loran still good in UK (plus I used to sell
these when I worked for Austron, and would be nice to actually own one).

Rob Kimberley

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. Forster
Sent: 15 April 2012 19:41
To: time-nuts@febo.com
Subject: [time-nuts] LORAN-C at MIT

At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There was
also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

Seems the stuff is hitting the skids.

-John






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[time-nuts] HP 5372A speed and stability

2012-04-15 Thread John Raymond Dore

Information is on the www.agilent.com website
73s John GW3XPK
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Re: [time-nuts] T-bolt steering an LPRO...?

2012-04-15 Thread Chris Albertson

Many times when you search an archive you get a lot more information than
you can use.  Let us know what you find in your search of the archives.

I'm planning on doing something like this too, only using one of the new
FE5680A units.   My plan is to use a  74HCT4046 as the phase detector.  I
can put both the reference 10MHz and the 10MHz from the Rb into the
74hc4046 and the chip will tell me if they are in lock.  Pretty much a one
chip solution for $2.   Then a microprocessor (Arduino) reads the lock pin
and sends an RS232 command to the FE5680.  I will also have the uP send
status to a small 2x16 LCD text display.After this works I can easily
move the software over to an AVR and free up the more expensive Arduino.

This would be a much harder problem if the GPS only had a 1Hz PPS.  But
with a 10MHz output it is a simple project.  How ever the time constants in
the firm ware will need to be tweaked and it will lily take weeks to find
what works best.  I assume with a Rb that the constants are hours or days
long.




On Sun, Apr 15, 2012 at 6:03 AM, Michael Baker mp...@clanbaker.org wrote:

 Time-nutters--

 Some time ago I queried the list for info on how to connect
 and steer an LPRO-101  Rb oscillator with a T-bolt.   Now that
 I am ready to start on that project I can't find the responses I
 got from the list.

  I apologize for this repeat of my original query but it is not
 my fault--  Mice sneak in at night and mess with my computer
 and lose my saved files  (that's my story and I am sticking
 with it!).

 Thanks (again) for any feedback on this!!

 Mike Baker
 -

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-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] HP 5372A speed and stability

HI

Simple answer:

It's a 200 ps (single shot) box. That makes it similar to a 53132, but not in 
the same league as a SR--620. Being as old as it is, some of the fancy math in 
a CNT-90 is not included with a 5372. Still a very useful box though. 

Normally you see them with a HP 10811. I don't think there were any other built 
in standards offered. 

Bob

On Apr 15, 2012, at 3:16 PM, Dickson Fu wrote:

 Hi all,
  
 Does somebody know the speed and stability of HP 5372A Time Interval 
 analyzer?   in terms of the number of digit per second.
 Also, what's the standard built-in frequency reference?
  
 Lastly, what's the max number of digit when performs as a frequency counter?
  
 Thanks and Regards,
 Dickson Fu
 VR2WHF
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Re: [time-nuts] LORAN-C at MIT

Some did. Possibly not all. I know a local time nut who bought one. There
was some other, older, Austron stuff (2 pieces) that had not sold by about
noon.

Before you ask, I do not know the seller.

-

FWIW, I asked about the price early on. He didn't know and was playing on
eBay with his iPoo to get a price. I told him LORAN was defunct and he
didn't seem to believe me, so I voted with my feet and shopped elsewhere.
At that time he had 3 2100Fs in a 4 or 5 foot rack in a box truck, plus
some loose stuff.

-John

===


 Silly thought, but do you know if the 2100F units sold or not. I'm
 interested at that price as Loran still good in UK (plus I used to sell
 these when I worked for Austron, and would be nice to actually own one).

 Rob Kimberley

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of J. Forster
 Sent: 15 April 2012 19:41
 To: time-nuts@febo.com
 Subject: [time-nuts] LORAN-C at MIT

 At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
 was
 also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

 Seems the stuff is hitting the skids.

 -John

 




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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] HP 5372A speed and stability

2012-04-15 Thread Jerry Mulchin

Dickson,

With a gate time of 10 seconds, in statistics mode you can see 13 digits at 
10MHz easily.
While I agree it is not an SR620, it a very worth while unit to own. Much nicer 
than the 5370B units
to operate, and if you get the C model, you can measure all the way to a 
little over 2GHz.

Jerry

At 12:16 PM 4/15/2012, you wrote:
Hi all,
 
Does somebody know the speed and stability of HP 5372A Time Interval analyzer? 
  in terms of the number of digit per second.
Also, what's the standard built-in frequency reference?
 
Lastly, what's the max number of digit when performs as a frequency counter?
 
Thanks and Regards,
Dickson Fu
VR2WHF
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Jerry Mulchin



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Re: [time-nuts] Antenna restrictions [was Lucent 40 dB Antenna]

2012-04-15 Thread DaveH

I am on the Tesla email list and people there have noted that some of the
black plumbing pipe actually has carbon black added to it -- this renders
the pipe conductive and not good for a Tesla secondary form.

Would not be good for RF either. 

Dave

 -Original Message-
 From: time-nuts-boun...@febo.com 
 [mailto:time-nuts-boun...@febo.com] On Behalf Of gary
 Sent: Sunday, April 15, 2012 6:21 AM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Antenna restrictions [was Lucent 40 
 dB Antenna]
 
 The dummy pipe would be fine.
 
 In theory ABS makes a good radome, but in practice whatever 
 you get at 
 the hardware store effects antennas significantly. [ABS and 
 PVC is the 
 first thing that comes to mind when weather proofing home made 
 antennas.] The AWACS uses S-2 glass for it's radome. The dielectric 
 constant is worse than ABS, but perhaps when the dust 
 settles, the S-2 
 glass can be thinner that ABS for the same strength. So perhaps in 
 practice it is a better radome.
 
 S-2 glass is off the shelf if you have a Tap Plastics handy. S-2 tube 
 forms are easy to make with a cardboard tube and some mylar. 
 The result 
 is a beige tube that is somewhat translucent.
 
 I haven't shot mine to test out the ballistic properties.
 
 
 On 4/15/2012 5:41 AM, Chuck Harris wrote:
  Yes, but you GPS antenna surely would notice the infusion
  with various fumes and chemicals that come from the vent
  pipe. Remember, the vent is open to the sewer, its purpose
  is to prevent pressure build up in the sewer from blowing
  (or sucking) the water out of the various traps and letting
  sewer gas into the house.
 
  However, one could add a dummy plumbing vent to the roof
  without anyone noticing.
 
  -Chuck Harris
 
  Chris Albertson wrote:
  On Sat, Apr 14, 2012 at 11:01 PM, Perry 
 Sandeensandee...@yahoo.com
  wrote:
 
 
 
  Esteemed Time-nutters
 
  The religious answer.
 
  1. Install antenna in as inconspicuous location as possible.
 
 
  A GPS timing antenna should fit INSIDE a 4 plumbing vent. The ABS
  plastic
  pipe will not effect the GPS signals. Some houses will 
 have a 4 vent
  pipe, most will be smaller but it is easy to slip a larger 
 diameter pipe
  over a small one. Buy a 30 inch length of 4 black ABS 
 drain pipe and
  simply drop it on to of any smaller vent pipe. No one 
 would ever notice
  and your plumbing system will not notice either.
 
 
  Chris Albertson
  Redondo Beach, California
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Re: [time-nuts] HP 5372A speed and stability

2012-04-15 Thread Magnus Danielson


On 04/15/2012 09:55 PM, Bob Camp wrote:

HI

Simple answer:

It's a 200 ps (single shot) box. That makes it similar to a 53132, but not in 
the same league as a SR--620. Being as old as it is, some of the fancy math in 
a CNT-90 is not included with a 5372. Still a very useful box though.

Normally you see them with a HP 10811. I don't think there were any other built 
in standards offered.


I agree fully with Bob here.

It's a 200 ps single shot resolution box, with the hardware prepared for 
100 ps upgrade of interpolator boards. It excels in being able to run 10 
MS/s or peak 13.3 MS/s rates until memory fills (8192 samples in total). 
It has a diversity of modes and I think it is unfair to say that it 
lacks fancy math compared to the CNT-90, as it has some stuff which the 
CNT-90 does not offer. Rather, they have different strengths.
Pendulum didn't want to bring some of the stuff into the CNT-90 as it 
would kill the market for their time software to run on the side.


The HP5372A is kind of nice even if I wish the user interface had some 
modern features.


The aim was really for jitter analysis of medium rate signals. It has 
some cool features for longer term stability, where the time deviation 
(not to be confused with the TDEV measure) is really handy.


I've got the -10 option for C channel, and the -40 option for FFT.

Cheers,
Magnus

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Re: [time-nuts] HP 5372A speed and stability

Hi

I think I might stand up and defend the poor old 5370. It's a beast and not 
anywhere as sexy as a 5371 or (better yet) the 5372. It does indeed have better 
single shot resolution though.

Bob

On Apr 15, 2012, at 4:42 PM, Jerry Mulchin wrote:

 Dickson,
 
 With a gate time of 10 seconds, in statistics mode you can see 13 digits at 
 10MHz easily.
 While I agree it is not an SR620, it a very worth while unit to own. Much 
 nicer than the 5370B units
 to operate, and if you get the C model, you can measure all the way to a 
 little over 2GHz.
 
 Jerry
 
 At 12:16 PM 4/15/2012, you wrote:
 Hi all,
 
 Does somebody know the speed and stability of HP 5372A Time Interval 
 analyzer?   in terms of the number of digit per second.
 Also, what's the standard built-in frequency reference?
 
 Lastly, what's the max number of digit when performs as a frequency counter?
 
 Thanks and Regards,
 Dickson Fu
 VR2WHF
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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Stan, W1LE


The young fellow in the white truck quoted me a price for the FS700 as 100$.

My main interest was the ovenized 10 MHz source inside.

I did not see the simulator. That would of tweaked my interest...

I strolled on, looking for the food vendor

Stan, W1LECape Cod


On 4/15/2012 3:52 PM, J. Forster wrote:

Some did. Possibly not all. I know a local time nut who bought one. There
was some other, older, Austron stuff (2 pieces) that had not sold by about
noon.

Before you ask, I do not know the seller.

-

FWIW, I asked about the price early on. He didn't know and was playing on
eBay with his iPoo to get a price. I told him LORAN was defunct and he
didn't seem to believe me, so I voted with my feet and shopped elsewhere.
At that time he had 3 2100Fs in a 4 or 5 foot rack in a box truck, plus
some loose stuff.

-John

===



Silly thought, but do you know if the 2100F units sold or not. I'm
interested at that price as Loran still good in UK (plus I used to sell
these when I worked for Austron, and would be nice to actually own one).

Rob Kimberley

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. Forster
Sent: 15 April 2012 19:41
To: time-nuts@febo.com
Subject: [time-nuts] LORAN-C at MIT

At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
was
also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

Seems the stuff is hitting the skids.

-John






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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Don Latham

Oh, I can't stand it...from my location in the sticks... really an MIT
flea market??
real surplus/excess electronics
Nuttin' like that in western Montana.
'course we do have wide open spaces :-)
Don

Rob Kimberley
 Silly thought, but do you know if the 2100F units sold or not. I'm
 interested at that price as Loran still good in UK (plus I used to sell
 these when I worked for Austron, and would be nice to actually own one).

 Rob Kimberley

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of J. Forster
 Sent: 15 April 2012 19:41
 To: time-nuts@febo.com
 Subject: [time-nuts] LORAN-C at MIT

 At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
 was
 also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

 Seems the stuff is hitting the skids.

 -John

 




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-- 
Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind.
R. Bacon
If you don't know what it is, don't poke it.
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com



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Re: [time-nuts] HP 5372A speed and stability

2012-04-15 Thread Magnus Danielson


On 04/15/2012 11:30 PM, Bob Camp wrote:

Hi

I think I might stand up and defend the poor old 5370. It's a beast and not 
anywhere as sexy as a 5371 or (better yet) the 5372. It does indeed have better 
single shot resolution though.


Indeed. While the later has spiffy 68k processors with floating point 
units and sparkling green CRT the 5370 ticks away on a 6800 at 1,5 
MHz... but there is some hope. I'm test-driving a CPU upgrade board so 
my 5370B has an ethernet sneaked into it, DHCPed an address and I can 
make read-outs on the built in webserver. Not even the HP5372A pulls 
that off.


I need to hack away a bit on that one. But it brings new life into the 
good old HP5370B, that is for sure.


Cheers,
Magnus

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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread paul swed

John
Great wx at MIT today and I did see you with a few bargains. I think the
sun was getting to me plus wheeling dirt around yesterday and today. I am
bushed.
The SRS fs700 was from Kevin and at the start he wanted $150. Glad it found
a home.
I did pickup the simulator for $10 and 2 X 2100Fs and a 2100 each $20. They
all seem to work though someone was messing with the cables internally to
the one of the Fs. After putting them in the correct order the unit was
fine. I always look first before plugging in.
Stan would have been good to meet you. Though as I say it was getting
toasty in the sun.
Lots of smaller bargains also. Odds and ends stuff.
The fellow with the LORAN stuff said it came from a ham that had passed
away. That must have been some time-nut. There were still several austrons
there. 2 X timing rcvrs of the 2000 class and a 2000c. Just to heavy to
carry out. Plus they may have been gold. ;-) I know the HP paper was.
Though I picked up 6 rolls.
Regards
Paul
WB8TSL

On Sun, Apr 15, 2012 at 5:30 PM, Stan, W1LE stanw...@verizon.net wrote:

The young fellow in the white truck quoted me a price for the FS700 as
100$.

My main interest was the ovenized 10 MHz source inside.

I did not see the simulator. That would of tweaked my interest...

I strolled on, looking for the food vendor

Stan, W1LECape Cod

On 4/15/2012 3:52 PM, J. Forster wrote:

Some did. Possibly not all. I know a local time nut who bought one. There
was some other, older, Austron stuff (2 pieces) that had not sold by about
noon.

Before you ask, I do not know the seller.

FWIW, I asked about the price early on. He didn't know and was playing on
eBay with his iPoo to get a price. I told him LORAN was defunct and he
didn't seem to believe me, so I voted with my feet and shopped elsewhere.
At that time he had 3 2100Fs in a 4 or 5 foot rack in a box truck, plus
some loose stuff.

-John

===

Silly thought, but do you know if the 2100F units sold or not. I'm
interested at that price as Loran still good in UK (plus I used to sell
these when I worked for Austron, and would be nice to actually own one).

Rob Kimberley

-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-bounces@**febo.comtime-nuts-boun...@febo.com]
On
Behalf Of J. Forster
Sent: 15 April 2012 19:41
To: time-nuts@febo.com
Subject: [time-nuts] LORAN-C at MIT

At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
was
also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

Seems the stuff is hitting the skids.

-John

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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread bownes

Yup. Once a month. Good sized parking lot plus four or five floors of a parking 
garage. Sounds like there were enough T-N there to have had a gathering! :)

I too looked at all the loran units and decided to pass. 

III



On Apr 15, 2012, at 17:45, Don Latham d...@montana.com wrote:

 Oh, I can't stand it...from my location in the sticks... really an MIT
 flea market??
 real surplus/excess electronics
 Nuttin' like that in western Montana.
 'course we do have wide open spaces :-)
 Don
 
 Rob Kimberley
 Silly thought, but do you know if the 2100F units sold or not. I'm
 interested at that price as Loran still good in UK (plus I used to sell
 these when I worked for Austron, and would be nice to actually own one).
 
 Rob Kimberley
 
 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of J. Forster
 Sent: 15 April 2012 19:41
 To: time-nuts@febo.com
 Subject: [time-nuts] LORAN-C at MIT
 
 At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
 was
 also a LORAN-C simulator and a Stanford LORAN-C unit for $200.
 
 Seems the stuff is hitting the skids.
 
 -John
 
 
 
 
 
 
 ___
 time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
 and follow the instructions there.
 
 
 
 ___
 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.
 
 
 
 -- 
 Neither the voice of authority nor the weight of reason and argument
 are as significant as experiment, for thence comes quiet to the mind.
 R. Bacon
 If you don't know what it is, don't poke it.
 Ghost in the Shell
 
 
 Dr. Don Latham AJ7LL
 Six Mile Systems LLP
 17850 Six Mile Road
 POB 134
 Huson, MT, 59846
 VOX 406-626-4304
 www.lightningforensics.com
 www.sixmilesystems.com
 
 
 
 ___
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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread paul swed

Don
It is indeed quite an interesting meet. There are some in San Francisco
with the same feel. Though my Ham friends say that may be kind of in the
past.

On Sun, Apr 15, 2012 at 5:45 PM, Don Latham d...@montana.com wrote:

 Oh, I can't stand it...from my location in the sticks... really an MIT
 flea market??
 real surplus/excess electronics
 Nuttin' like that in western Montana.
 'course we do have wide open spaces :-)
 Don

 Rob Kimberley
  Silly thought, but do you know if the 2100F units sold or not. I'm
  interested at that price as Loran still good in UK (plus I used to sell
  these when I worked for Austron, and would be nice to actually own one).
 
  Rob Kimberley
 
  -Original Message-
  From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
  Behalf Of J. Forster
  Sent: 15 April 2012 19:41
  To: time-nuts@febo.com
  Subject: [time-nuts] LORAN-C at MIT
 
  At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
  was
  also a LORAN-C simulator and a Stanford LORAN-C unit for $200.
 
  Seems the stuff is hitting the skids.
 
  -John
 
  
 
 
 
 
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  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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  To unsubscribe, go to
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  and follow the instructions there.
 


 --
 Neither the voice of authority nor the weight of reason and argument
 are as significant as experiment, for thence comes quiet to the mind.
 R. Bacon
 If you don't know what it is, don't poke it.
 Ghost in the Shell


 Dr. Don Latham AJ7LL
 Six Mile Systems LLP
 17850 Six Mile Road
 POB 134
 Huson, MT, 59846
 VOX 406-626-4304
 www.lightningforensics.com
 www.sixmilesystems.com



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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread paul swed

Yet another time nut that makes at least 4 at MIT! Thats a very dense
population.

On Sun, Apr 15, 2012 at 5:52 PM, bownes bow...@gmail.com wrote:

 Yup. Once a month. Good sized parking lot plus four or five floors of a
 parking garage. Sounds like there were enough T-N there to have had a
 gathering! :)

 I too looked at all the loran units and decided to pass.

 III



 On Apr 15, 2012, at 17:45, Don Latham d...@montana.com wrote:

  Oh, I can't stand it...from my location in the sticks... really an MIT
  flea market??
  real surplus/excess electronics
  Nuttin' like that in western Montana.
  'course we do have wide open spaces :-)
  Don
 
  Rob Kimberley
  Silly thought, but do you know if the 2100F units sold or not. I'm
  interested at that price as Loran still good in UK (plus I used to sell
  these when I worked for Austron, and would be nice to actually own one).
 
  Rob Kimberley
 
  -Original Message-
  From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
  Behalf Of J. Forster
  Sent: 15 April 2012 19:41
  To: time-nuts@febo.com
  Subject: [time-nuts] LORAN-C at MIT
 
  At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
  was
  also a LORAN-C simulator and a Stanford LORAN-C unit for $200.
 
  Seems the stuff is hitting the skids.
 
  -John
 
  
 
 
 
 
  ___
  time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
  https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
  and follow the instructions there.
 
 
 
  ___
  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.
 
 
 
  --
  Neither the voice of authority nor the weight of reason and argument
  are as significant as experiment, for thence comes quiet to the mind.
  R. Bacon
  If you don't know what it is, don't poke it.
  Ghost in the Shell
 
 
  Dr. Don Latham AJ7LL
  Six Mile Systems LLP
  17850 Six Mile Road
  POB 134
  Huson, MT, 59846
  VOX 406-626-4304
  www.lightningforensics.com
  www.sixmilesystems.com
 
 
 
  ___
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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread David I. Emery

On Sun, Apr 15, 2012 at 05:54:31PM -0400, paul swed wrote:
 Yet another time nut that makes at least 4 at MIT! Thats a very dense
 population.

I sometimes go myself, making at least 5... wasn't there this morning
though...



-- 
  Dave Emery N1PRE/AE, d...@dieconsulting.com  DIE Consulting, Weston, Mass 
02493
An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
celebration of what could have been, but wasn't and is not to be now either.


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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Don Latham



 I know the HP paper was.
 Though I picked up 6 rolls.
 Regards
 Paul
 WB8TSL

Paul and all: I have two boxes of 9270-1010 Hp paper (about 12
wide)with 25 rolls in each box, and another box mixed with Honeywell
about the same size. I'd be happy to send some of it to time nuts for
the cost of shipping. I modified my Heathkit chart recorder for the Hp
paper, but might use a whole 2-3 rolls in the time left. Was just ready
to recycle, so please let me know.

Don


Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind.
R. Bacon
If you don't know what it is, don't poke it.
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com



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Re: [time-nuts] LORAN-C at MIT

Most of the stuff is private sellers...  not like it's open shopping at
the labs.

Yes, seven times a year;
Third Sunday of every month;
April through October.

-John

==





 Oh, I can't stand it...from my location in the sticks... really an MIT
 flea market??
 real surplus/excess electronics
 Nuttin' like that in western Montana.
 'course we do have wide open spaces :-)
 Don

 Rob Kimberley
 Silly thought, but do you know if the 2100F units sold or not. I'm
 interested at that price as Loran still good in UK (plus I used to sell
 these when I worked for Austron, and would be nice to actually own one).

 Rob Kimberley

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of J. Forster
 Sent: 15 April 2012 19:41
 To: time-nuts@febo.com
 Subject: [time-nuts] LORAN-C at MIT

 At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
 was
 also a LORAN-C simulator and a Stanford LORAN-C unit for $200.

 Seems the stuff is hitting the skids.

 -John

 




 ___
 time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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 ___
 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.



 --
 Neither the voice of authority nor the weight of reason and argument
 are as significant as experiment, for thence comes quiet to the mind.
 R. Bacon
 If you don't know what it is, don't poke it.
 Ghost in the Shell


 Dr. Don Latham AJ7LL
 Six Mile Systems LLP
 17850 Six Mile Road
 POB 134
 Huson, MT, 59846
 VOX 406-626-4304
 www.lightningforensics.com
 www.sixmilesystems.com



 ___
 time-nuts mailing list -- time-nuts@febo.com
 To unsubscribe, go to
 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread lists

It is all over in the bay area. When manufacturing got outsourced, so did the 
surplus. 

A lot of my lab is made up of Foothill and Livermore flea market purchases. 
(The local Metro PCS tech had the surplus Symetricomm and similar gear.) 
Foothiil begat the Lockheed parking lot which begat DeAnza. It is mostly junk. 

Livermore did good until the community college decided not to allow it to be 
hosted there. It was moved to a park and ultimately shut down. 

The TRW swapmeet is on my bucket list. 

-Original Message-
From: paul swed paulsw...@gmail.com
Sender: time-nuts-boun...@febo.com
Date: Sun, 15 Apr 2012 17:53:35 
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] LORAN-C at MIT

Don
It is indeed quite an interesting meet. There are some in San Francisco
with the same feel. Though my Ham friends say that may be kind of in the
past.

On Sun, Apr 15, 2012 at 5:45 PM, Don Latham d...@montana.com wrote:

 Oh, I can't stand it...from my location in the sticks... really an MIT
 flea market??
 real surplus/excess electronics
 Nuttin' like that in western Montana.
 'course we do have wide open spaces :-)
 Don

 Rob Kimberley
  Silly thought, but do you know if the 2100F units sold or not. I'm
  interested at that price as Loran still good in UK (plus I used to sell
  these when I worked for Austron, and would be nice to actually own one).
 
  Rob Kimberley
 
  -Original Message-
  From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
  Behalf Of J. Forster
  Sent: 15 April 2012 19:41
  To: time-nuts@febo.com
  Subject: [time-nuts] LORAN-C at MIT
 
  At the MIT Flea today, I saw 4x Austron 2100Fs for about $25 each. There
  was
  also a LORAN-C simulator and a Stanford LORAN-C unit for $200.
 
  Seems the stuff is hitting the skids.
 
  -John
 
  
 
 
 
 
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 --
 Neither the voice of authority nor the weight of reason and argument
 are as significant as experiment, for thence comes quiet to the mind.
 R. Bacon
 If you don't know what it is, don't poke it.
 Ghost in the Shell


 Dr. Don Latham AJ7LL
 Six Mile Systems LLP
 17850 Six Mile Road
 POB 134
 Huson, MT, 59846
 VOX 406-626-4304
 www.lightningforensics.com
 www.sixmilesystems.com



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Re: [time-nuts] LORAN-C at MIT

Six. I know someone who has been to almost as many of them as I have is on
this list. However he rarely posts. Another, which makes seven, has not
been seen lately.

-John




 On Sun, Apr 15, 2012 at 05:54:31PM -0400, paul swed wrote:
 Yet another time nut that makes at least 4 at MIT! Thats a very dense
 population.

   I sometimes go myself, making at least 5... wasn't there this morning
 though...



 --
   Dave Emery N1PRE/AE, d...@dieconsulting.com  DIE Consulting, Weston, Mass
 02493
 An empty zombie mind with a forlorn barely readable weatherbeaten
 'For Rent' sign still vainly flapping outside on the weed encrusted pole -
 in
 celebration of what could have been, but wasn't and is not to be now
 either.


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[time-nuts] LORAN-C at MIT

2012-04-15 Thread Jim Hickstein


On 2012/04/15 16:54, time-nuts-requ...@febo.com wrote:

It is indeed quite an interesting meet. There are some in San Francisco
with the same feel. Though my Ham friends say that may be kind of in the
past.


Not at all!  I just went to the DeAnza event a month ago. 
http://www.electronicsfleamarket.com/  Came home with a scope.  Livermore has 
been cancelled, though.


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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread lists

DeAnza ain't Foothill. Trust me. 

I used to get a kick out of seeing Dobkin and Williams wander around the junk 
at Foothill.  And Bob Pease selling his books out of the boot of his Beatle. 
Dose were da days. 

Sadly, the last scope I bought was a Chinese Rigol. (I do have real scopes 
too.) It is getting to the point where Rigol and Instek will make buying boat 
anchors a thing of the past. 

-Original Message-
From: Jim Hickstein j...@jxh.com
Sender: time-nuts-boun...@febo.com
Date: Sun, 15 Apr 2012 17:19:42 
To: time-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts]  LORAN-C at MIT

On 2012/04/15 16:54, time-nuts-requ...@febo.com wrote:
 It is indeed quite an interesting meet. There are some in San Francisco
 with the same feel. Though my Ham friends say that may be kind of in the
 past.

Not at all!  I just went to the DeAnza event a month ago. 
http://www.electronicsfleamarket.com/  Came home with a scope.  Livermore has 
been cancelled, though.

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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Don Latham


 It is getting to the point where Rigol and Instek will make
 buying boat anchors a thing of the past.

Actually, my last scope buy was a Bitscope USB appliance. It's nice!
Don


-- 
Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind.
R. Bacon
If you don't know what it is, don't poke it.
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com



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Re: [time-nuts] LORAN-C at MIT


On 4/15/12 3:09 PM, li...@lazygranch.com wrote:

It is all over in the bay area. When manufacturing got outsourced, so did the 
surplus.

A lot of my lab is made up of Foothill and Livermore flea market purchases. 
(The local Metro PCS tech had the surplus Symetricomm and similar gear.) 
Foothiil begat the Lockheed parking lot which begat DeAnza. It is mostly junk.

Livermore did good until the community college decided not to allow it to be 
hosted there. It was moved to a park and ultimately shut down.

The TRW swapmeet is on my bucket list.



hmm.. it's not all that wonderful either..

Several problems

1) different processes at large companies that used to buy lots of 
equipment, and then keep it for a while.. now they contract it out to 
equipment rental places, so they don't have the gear on the books.  To 
the ultimate customer, it makes no difference.


2) a much more diverse and rich environment for used gear to flow into. 
 the internet has made it easier to put buyers and sellers together


3) different surplus equipment policies. along with #1, there's not as 
much company owned gear to be surplused, and the processes don't lend 
themselves to Bob loading up the truck and taking it down to the 
swapmeet  Various and sundry ethics rules prevent surplus sales to 
employees (to prevent declaring that brand new VNA as surplus). 
These days, often they will contract with somone to haul away scrap and 
surplus, and that contractor counts on a good mix of valuable and not so 
valuable.  (At JPL, dumpster diving is a definite no-no)


4) less user serviceable stuff in general.  If it breaks, it's scrap, 
not repairable.



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Re: [time-nuts] Antenna restrictions [was Lucent 40 dB Antenna]


On 4/15/12 2:09 PM, DaveH wrote:

I am on the Tesla email list and people there have noted that some of the
black plumbing pipe actually has carbon black added to it -- this renders
the pipe conductive and not good for a Tesla secondary form.

Would not be good for RF either.


It varies.. I've had ABS that was fairly conductive (terrible for an 
electrostatic charging machine) and ABS that's pretty good.


Electrical and RF properties just aren't something they care about, so a 
lot depends on the mix of the day



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Re: [time-nuts] HP 5372A speed and stability

2012-04-15 Thread Jerry Mulchin

Sorry, didn't mean to imply that the 5370B was not worth owning. It is a very 
nice unit as well.
I have one of these as well, but unfortunately I lost one input channel, bad 
input custom IC. If
I could only find a replacement for the bad IC I would use it as well. Right 
now it's just a nice
high digit frequency counter. Anyone know where I can get a replacement IC for 
the input
channel at a reasonable price?

Jerry

At 01:42 PM 4/15/2012, you wrote:
Dickson,

With a gate time of 10 seconds, in statistics mode you can see 13 digits at 
10MHz easily.
While I agree it is not an SR620, it a very worth while unit to own. Much 
nicer than the 5370B units
to operate, and if you get the C model, you can measure all the way to a 
little over 2GHz.

Jerry

At 12:16 PM 4/15/2012, you wrote:
Hi all,
 
Does somebody know the speed and stability of HP 5372A Time Interval 
analyzer?   in terms of the number of digit per second.
Also, what's the standard built-in frequency reference?
 
Lastly, what's the max number of digit when performs as a frequency counter?
 
Thanks and Regards,
Dickson Fu
VR2WHF
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Jerry Mulchin



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Jerry Mulchin



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[time-nuts] LORAN-C at MIT

2012-04-15 Thread Arthur Dent

J. Forster:
.and a Stanford LORAN-C unit for $200.

Stan, W1LE:
The young fellow in the white truck quoted me a price for the FS700 as 100$.

The Stanford FS700 went for a fair amount less than $100 and looked to be 
in really good condition. It was quite fittingly sold to a guy with a Don't 
forget 
to add the leapsecond tee-shirt.

-Arthur
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[time-nuts] WWVB test: some results

2012-04-15 Thread John Seamons

It appears that, like last month's test, the phase data pattern transmitted is 
constant and repeats every minute. The pattern is different than last time 
however:

+-- sec 0
v
 April 15 2012
1001100101 010011 111000 1110101100 0010111000 1101101000 -- sec 59
101100 100111 1001100111 010010 010010 10
 March 11 2012

 April 15 2012
sync=01001100101010 tpar=0 hour=001110101100 min=010111
sync=010110 tpar=01001 hour=1100110011010010 min=100101
 March 11 2012

 April 15 2012
dston=0 leap=0 dlpar=110 dst=110100 r=1000
dston=1 leap=1 dlpar=111 dst=11 r=1101
 March 11 2012

I'm pretty sure I have the phase ambiguity correct since the two sync bits 
between minute frames (at secs 0 and 59) have the same value across both tests.

But the other bits and fields don't make any sense with respect to the NIST 
spec: The minute field doesn't increment, the dston/leap parity bits aren't 
correct, etc.
So my guess is that they're only testing the autocorrelation properties of 
different sync patterns rather than the full protocol. But who knows..


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Re: [time-nuts] HP 5372A speed and stability

Hi

Even back when they were new that IC was a beyond belief priced item. The 
same goes for the input on a 5335. You can indeed rig up something to replace 
either one, but I know of no direct replacements.

Bob

On Apr 15, 2012, at 7:19 PM, Jerry Mulchin wrote:

 Sorry, didn't mean to imply that the 5370B was not worth owning. It is a very 
 nice unit as well.
 I have one of these as well, but unfortunately I lost one input channel, bad 
 input custom IC. If
 I could only find a replacement for the bad IC I would use it as well. Right 
 now it's just a nice
 high digit frequency counter. Anyone know where I can get a replacement IC 
 for the input
 channel at a reasonable price?
 
 Jerry
 
 At 01:42 PM 4/15/2012, you wrote:
 Dickson,
 
 With a gate time of 10 seconds, in statistics mode you can see 13 digits at 
 10MHz easily.
 While I agree it is not an SR620, it a very worth while unit to own. Much 
 nicer than the 5370B units
 to operate, and if you get the C model, you can measure all the way to a 
 little over 2GHz.
 
 Jerry
 
 At 12:16 PM 4/15/2012, you wrote:
 Hi all,
 
 Does somebody know the speed and stability of HP 5372A Time Interval 
 analyzer?   in terms of the number of digit per second.
 Also, what's the standard built-in frequency reference?
 
 Lastly, what's the max number of digit when performs as a frequency counter?
 
 Thanks and Regards,
 Dickson Fu
 VR2WHF
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 Jerry Mulchin
 
 
 
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 Jerry Mulchin
 
 
 
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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Steve Byan


On Apr 15, 2012, at 6:09 PM, J. Forster wrote:

 Six. I know someone who has been to almost as many of them as I have is on
 this list. However he rarely posts. Another, which makes seven, has not
 been seen lately.

Eight, I suppose, though I'm by no means a full-fledged time-nut.

I did score a Julie Research Labs VDR-106 at the MITflea, so I guess I at least 
qualify as a volt-nut.

I did spot the fellow with the leap-second T-shirt.

Best regards,
-Steve

-- 
Steve Byan steveb...@me.com
Littleton, MA 01460




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Re: [time-nuts] LORAN-C at MIT

2012-04-15 Thread Scott McGrath

Another at MIT at 1pm only one of the austron 2100's remained unsold

Scott

Sent from my iPhone

On Apr 15, 2012, at 8:03 PM, Steve Byan steveb...@verizon.net wrote:

 
 On Apr 15, 2012, at 6:09 PM, J. Forster wrote:
 
 Six. I know someone who has been to almost as many of them as I have is on
 this list. However he rarely posts. Another, which makes seven, has not
 been seen lately.
 
 Eight, I suppose, though I'm by no means a full-fledged time-nut.
 
 I did score a Julie Research Labs VDR-106 at the MITflea, so I guess I at 
 least qualify as a volt-nut.
 
 I did spot the fellow with the leap-second T-shirt.
 
 Best regards,
 -Steve
 
 -- 
 Steve Byan steveb...@me.com
 Littleton, MA 01460
 
 
 
 
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[time-nuts] Trimble/Nortel GPSTM (NTGS50AA) - working with Lady Heather.

2012-04-15 Thread Sam

There was some discussion in Dec 2011 regarding the Trimble/Nortel GPSTM 
(NTGS50AA) which fizzed out after it was mentioned that Lady Heather would not 
work with these units. I was undeterred and purchased some anyway.

I have started playing around with these and have discovered that by asking it 
Sat status (0x10, 0x3C, 0x10, 0x03) at ~300ms intervals the unit will start 
streaming data after a few seconds. Once the Trimble is in this state Lady 
Heather detects the GPSDO and seems to work normally... Except the TC and DAMP 
fields which are reported as 0.0 and GAIN which is reported as -3.500 Hz/V 
(Tboltmon reports the correct values) I have read that this also happens with 
older Thunderbolts?

I have written a small Windows app (available on request, off list) that sends 
the required packets to the GPSTM and by wrapping it in a batch file I have it 
opening Lady Heather once the unit is in the required state. (Only required 
once, or after running Tboltmon)


Details of my 3, Trimble NTGS50AA's are:

Firmware:
App: 2.68  - 16 Dec 2004
GPS: 10.4 - 15 Dec 2004

GPS receiver has 8 Channels.

Default disciplining parameters as reported by Tboltmon:
Time Constant (sec): 100.0
Damping: 1.2
Ko (Hz/V) 1.20
Min Voltage: 0.0
Max Voltage: 6.0
Initial DAC Voltage: 3.00
Jam Sync Thresh (ns): 0.0
Max Freq Offset (ppb): 45.0

These GPSDO's uses the Trimble 34310 DOCXO which I think is the Vectron OC-050?

There are 4 SMB RF connectors on the main board:
1. GPS Antenna Input
2. 10.000 MHz Output
3. 9.834 MHz Output
4. 0.5 Hz (Even Sec)  PP2S Output. Unfortunately requesting the unit to output 
1PPS does nothing. (yet)

The 9.8304MHz output may be handy.. divided by 300 it's 32.768 KHz ;)

Power Supply:
The NTGS50AA requires 36-75 VDC (48V nominal) and has a on-board Lucent DC-DC 
converter to supply the required +/-12 and +5 volts.

Serial Interfaces:
Port A is RS-422 @19200 SCPI (available on the 110 pin connector on the main 
board)
Port B is RS-232 @9600 TSIP (DB9 connector on Breakout board)

LED indicators:
There are 5 LED's on the breakout board that contains the DB9 connector.
1. Power
2. Not used, but switch-able via software
3. Not used, but switch-able via software
4. Lock
5. Holdover

Temperature Sensor:
DS1620 Rev D

Jumpers:
There is a 8 pin header (JP1) on the main board that would accept 4 jumpers.. I 
haven't tried them but it is tempting to see what happens when I enable them.


//Sam

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Re: [time-nuts] Trimble/Nortel GPSTM (NTGS50AA) - working with Lady Heather.