Re: [time-nuts] Motorola GPS Antenna?

[Gregory Beat]

I grew up downstate — NE of Quincy, IL and the Motorola TV mfg. operations at 
Quincy closed before the Franklin Park (North) plant.  While there were 
assurances that Panasonic would continue operations at Quincy, local officials 
were caught “off guard” with decision to close a Motorola plant that was less 
than 15 years old.  
My high school electronics instructor (former Motorola) came to new vocational 
wing of high school (1970) as a result of those layoffs and closings.

greg
==
Since timing is everything to TimeNuts ….. :)

The Motorola TV plant ( known as the Franklin Park North plant, not to be 
confused with Franklin Park South where they made …. errr ….. oscillators ) to 
Panasonic in 1974. 

The whole transaction came as quite a shock to the people involved. The guy 
running
the division was very much caught off guard….. He happened to be presenting to 
a group of us the day after the announcement ….

The Panasonic cell tower timing antenna shows up under a *lot* of different 
labels. They do indeed sell it under the Panasonic brand name as well. It is 
regarded as reasonably bullet proof in terms of blocking cell tower RFI.

Bob

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Re: [time-nuts] Motorola GPS Antenna?

[Gregory Beat]

Motorola has worked with Matsushita Electric Industrial Co., Ltd (now known as 
Panasonic Corporation) since 1960s.  Motorola sold their television division to 
Matsushita in 1970.
—
I believe that Motorola and Panasonic jointly developed this GPS antenna. While 
Motorola exited the GPS receiver business over a decade ago, Panasonic 
continued to OEM the VIC-100 antenna.

Synergy has a product page and data sheet for the Panasonic VIC-100 antenna.
http://www.synergy-gps.com/index.php?option=com_content=view=139=114

greg, w9gb

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Re: [time-nuts] Z3816A RS-232 interface

[Gregory Beat]

Check TWO things.

1.) Has the RS-232 level converter (1488/1489, MAX232, etc.) failed?

2.) What MODE is your Z3816A, SCPI?  The GPSCon software places Z3816A into 
SCPI.

This is discussed in K8CU’s notes, below:

K8CU Notes - HP Z3816A GPS Frequency Standard Receiver

https://www.realhamradio.com/GPS_Z3816A_Receiver.htm

greg, w9gb

===

I am getting some very peculiar behavior with the serial interface on
my GPS rcvr (Z3816A).
To date, the only thing that works is Sat Stat on a windows 2000 computer.
I am using a Null modem and set the monitor computer to 9600-8N1.
Other computers and/or utilities seem to give irregular behavior.

I have looked at the signals with a scope and they seem borderline OK.
The signals (Rx and Tx) swing a bit more than +/- 7 V. There is also some
digital noise riding on the lines.
I also notice that the -15 Vdc line on the internal power supply is not
working (it reads about + 1.2 V).
Someone on the web I found a posting claiming that the -15 Vdc line is not
needed for the Z3816A.

Any help would be appreciated.
1. Is 9600-8N1 correct?
2. Could the lack of the -15 Vdc line be the root cause?
3. Has anyone managed to use GpsCon with a Z3816A?
—
Thanks much for any input!

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Re: [time-nuts] Introduction ... HP 3586

[Gregory Beat]

I highly recommend the Practical Guide created by Bill Feldmann, N6PY (sk, 
2007),
found in the KO4BB repository.
—
NOTE: Check for damage by the NiCad battery !!
—-
A PRACTICAL GUIDE FOR USING THE HP 3586A/B/C SELECTIVE LEVEL METER
Expanded Version, (Version 2.2), September 2007
by Bill Feldmann, N6PY 
(Addition of figures and repagination courtesy of Perry Sandeen 7/09)
http://www.ko4bb.com/manuals/24.14.254.9/A_Practical_Guide_For_Using_The_HP_3586.pdf

The HP 3586 family of Selective Level Meters was designed for the measurement 
of low power or voltage levels on telephone lines carrying multiplexed single 
side band radio frequency signals along with lower frequency audio signals. 
It’s designed to test and troubleshoot parameters commonly found on these 
lines. This instrument is a very sensitive, selective and accurately calibrated 
receiver that’s also capable of outputting a very low distortion signal of 0dBm 
at exactly the frequency it’s tuned to.
==
greg, w9gb

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Re: [time-nuts] Odetics Telecom CommSync - GPS Rollover Problem

[Gregory Beat]

N4IQT has nice photos of the Comsync (outside and inside)
http://www.n4iqt.com/comsync/
You can see the EPROM (v1.63 , 1998 date)
http://www.n4iqt.com/comsync/gpsdo003.JPG

Looks like an 8-channel Motorola Oncore receiver
http://www.n4iqt.com/comsync/gpsdo001.JPG
Upclose
http://www.n4iqt.com/comsync/gpsdo007.JPG

greg
—-
Date: Fri, 23 Mar 2018 20:50:40 -
From: "Rob Kimberley" 
To: "'Discussion of precise time and frequency measurement'"
   
Subject: [time-nuts] Odetics Telecom CommSync - GPS Rollover Problem.


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Re: [time-nuts] Looking for information on True Position GPSDO.

[Gregory Beat]

John -

I would NOT bother with trying to replace the 10 MHz oscillator.

Spend your $$ for the inexpensive Arduino board, LCD, 5 volt antenna, and nice 
enclosure  that will provide you with a “self-running” GPSDO unit (operator 
intervention not required to operate).
The fact that Mt. Airy has already provided the Arduino “firmware” (HEX) is a 
BIG plus —  IF you have no coding experience.

In addition, you should change to Google for Internet searches, and routinely 
post purchase queries to focus groups, like time-nuts, before blindly 
purchasing on eBay.
That is the “smart approach”, that saves time, $$ and get what you desire.

Greg, w9gb
===
Date: Sun, 18 Mar 2018 09:59:08 -0500
From: John Green 
To: time-nuts@febo.com
Subject: [time-nuts] Looking for information on True Position GPSDO.

This isn't a bad looking little board. 
I was thinking of pulling the little CTS oscillator and replacing it with 
something better.
The fact that you have to tell it to do its thing is something of a bummer, 
but I think I can live with it.

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Re: [time-nuts] Looking for information on True Position GPSDO.

[Gregory Beat]

True Position was a Berwyn, PA mobile industry equipment provider.
In 2014 they acquired Skyhook Wireless and changed company name to acquirer’s.
—
These True-Position units are surplus from the cellular/mobile phone industry.
Several years ago, when these units first appeared (2010/2011), the Mt. Airy 
VHF Radio Club (“Pack Rats”, Philadelphia, PA area) created a Technical Project 
to use these GPS units as a cheap GPSDO for amateur radio (and time-nut) users.
http://www.packratvhf.com/index.php/technical-articles

A Packrat GPS Receiver Project
by Gary WA2OMY and Bruce WA3YUE
http://www.packratvhf.com/index.php/technical-articles/160-gps-receiver-project

This project was developed to use surplus GPS receiver boards to provide a 
precision 10 MHz reference for the ham community using equipment that accepts a 
10 MHZ reference or clock. We hope to have accomplished this at a reasonable 
cost to the community.
Project PDF (31 pages, extensive photos for beginner DIY / Maker)
http://www.packratvhf.com/attachments/article/160/A-Packrat-GPS-Receiver-Project.pdf

The Internet Link (above) has the necessary HEX files with or without Display,
as well as PDF of the Club’s Powerpoint presentation.  The Mt. Airy club NO 
LONGER have surplus TruePosition units, as this club project was 7-8 years ago.

MANY Asian eBay resellers are NON-STEM, 
relying on Mt. Airy project and other published documents to determine $$ 
surplus value.

Greg, w9gb
===
Date: Sun, 18 Mar 2018 09:59:08 -0500
From: John Green 
Subject: [time-nuts] Looking for information on True Position GPSDO.

There is a small, about 3.5" by 4.5", GPSDO board being offered by several
sellers on eBay. I bought one from what looks to be the only US based
source. It is identified as True Position, Inc., and had a small CTS OCXO
and Furuno GT8031 on board.
==
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Re: [time-nuts] Need Oncore connector info.

[Gregory Beat]

Some manufacturers, of 2x5 headers are:
Amphenol/FCI, Samtec, Harwin, Sullins, Molex, MillMax, Hirose, etc.

One example:
https://www.digikey.com/product-detail/en/amphenol-fci/87606-305LF/609-4813-ND/1524453

Numerous power/data interface boards have been developed over past 20 years.

2012 DIY Blog for Oncore interface board
http://doschman.blogspot.com/2012/11/motorola-oncore-ut-interface-and-pps.html

greg, w9gb

Sent from iPad Air

> On Feb 27, 2018, at 11:31 AM, Gregory Beat <w...@icloud.com> wrote:
> 
> TAPR : Motorola Oncore receiver product page
> http://www.tapr.org/gps_oncorevp.html
> 
> Data/Power Connector: 
> 10-pin (2x5) unshrouded header on 0.100" centers.
> ** Readily available connector widely used in PC boards (and computer 
> motherboards).**
> 
> RF Connector (Antenna):
> Straight or Right Angle MCX (also referenced as OCX).
> This connection has +5 VDC present for proper L1 GPS antenna.
> DO NOT Short or use with GPS antennas not rated to handle +5 VDC.
> Some early 3.3 VDC antenna models were not tolerant of higher voltage (Read 
> specs).
> 
> w9gb
> 
> Sent from iPad Air
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[time-nuts] DCF77 Time/Data Display Project

[Gregory Beat]

DCF77 is a German longwave time signal and standard-frequency radio station.
https://en.m.wikipedia.org/wiki/DCF77

There are commercial receivers and readers for DCF77, 
but this DIY project by Erik Deruiter from the Netherlands
using the Arduino MEGA from 2016 was unique.
https://youtu.be/ZadSU_DT-Ks

Github (V2.0), 
https://github.com/deruiter

Flickr photo gallery
https://www.flickr.com/photos/edr1924/albums/72157666568222444/

greg

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[time-nuts] Hemisphere Antenna PCB

[Gregory Beat]

These Hemisphere GNSS 500-1210-004# antenna / pre-amp boards (bulk, bare) with
no outdoor fiberglass enclosure appear to be same size used in A21 model.
Good for experimenter.
https://hemispheregnss.com/Products/Products/Peripherals/a21e284a2-antenna-135
Hemisphere GNSS is HQ in Scottsdale, AZ

Seller has eight (8) on the auction.
eBay auction: 142354760357

greg, w9gb
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Re: [time-nuts] Looking for Datum TymServe 2000 (TS2000) manual

[Gregory Beat]

Skip -
The Trimble Acutime 2000 outdoor antenna 
http://www.n4iqt.com/trimble/Acutime2000.pdf
looks identical to the Trimble Palisade GPS antenna.
http://dc2light.co.uk/PALISADE-Manual.zip

Mark, GM4ISM had surplus Palisade antennas, at one time.
He noted differential RS-422 configuration and TSIP output.  
He has Trimble programs on his web page.
http://dc2light.co.uk/GPS_ref.htm

Andy, G4JNT wrote a PIC conversion (Trimble—> NEMA) for Mark’s project.
http://www.g4jnt.com/pics.htm

Palisade uses Deutsch IMC-200 12-pin circular connector, part number: IMC26-2212
http://uk.farnell.com/deutsch/imc26-2212x/plug-in-line-12-way/dp/1019239

greg, w9gb

==Original Message==
From: Skip Withrow 
To: time-nuts 
Subject: [time-nuts] Looking for Datum TymServe 2000 (TS2000) manual

Hello Time-Nuts,
After a very long journey trying to figure out the correct cable
configuration between the AcuTime GPS antenna (receiver) and a Datum
TS2000 I now have it working.  Now I am in need of a manual so I can
talk over the serial port.  The protocol is apparently not the same as
the TS2100.

I'm more than happy to share the cable schematic if anyone needs it.
It would be the same for Bancomm bc627 and 635/7 (?) as well as the
TS2000.  If you have any of these units you could probably use many
different Trimble receivers (Resolution-T for instance) with RS-422
converter (though I have not tried it - yet).

Thanks in advance for any help.
Skip Withrow
==
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[time-nuts] Symmetricom 58532A GPS Antenna : Launch3 Surplus

[Gregory Beat]

https://www.febo.com/pipermail/time-nuts/2015-October/094105.html
In 2014 and 2015 Launch3 Telecom offered NOS Symmetricom 58532A GPS Antennas at 
a good price ($25 each) to time-nuts members  These were surplus (>750), never 
used, due to mobile/cellular company merger over decade ago.  Looks like they 
still have some.
https://www.launch3telecom.com/symmetricom/58532a.html
Symmetricom 58532A GPS Antenna -- Data-sheet
http://www.microsemi.com/document-portal/doc_view/133381-58532a
Launch3Telecom.com
27 Daniel Road
Fairfield, New Jersey 07004
===

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Re: [time-nuts] HP 105B: Modern replacement for NiCad battery pack?

[Gregory Beat]

Ulf -

Yes, this question, about the HP 105B, was asked in September 2016.
https://www.febo.com/pipermail/time-nuts/2016-September/100436.html

In Europe, it is virtually impossible (RoHS) to acquire NiCad batteries for 
past decade — unless you are an exempt entity.

IF you desire a DIY Build, examine these three (3) popular ICs for charger 
management.
Application Notes for these parts have typical circuits.

TI BQ24401 
Switch-mode NiCd/NiMH Battery Charger
http://www.ti.com/product/BQ24401/technicaldocuments

Maxim (old Dallas Semi) DS2715
NiMH Battery Pack Charge Controller
https://www.maximintegrated.com/en/products/power/battery-management/DS2715.html

Analog Devices (old Linear Tech) LTC4060
Standalone Linear NiMH/NiCd Fast Battery Charger
http://www.linear.com/product/LTC4060

Jameco sells the old Linear Tech charger ICs.
https://www.jameco.com/shop/keyword=Nimh-Battery-Charger-Ic
=== 
> I am looking for a modern replacement for the NiCad battery pack used in the 
> HP 105B. > One such 105 that I salvaged have been standing on a shelf with 
> the batteries "happily boiling away".
> So, what kind of chemistry would be possible to use without too much 
> re-design of the charging circuitry?
> Ulf Kylenfall, SM6GXV

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Re: [time-nuts] Oscilloquartz OSA-4350 GPSDO

[Gregory Beat]

Oscilloquartz OSA-4530 GPSDO : 2-page product brochure
http://syncarchitect.com/downloads/PDF_0018_453X.pdf

Magnus Danielson picked one up five years ago, but didn’t find the software.
https://www.febo.com/pipermail/time-nuts/2012-December/073331.html

The OSA 4530 is a three board design, with bottom board being power and control 
board, middle board being OCXO, output buffer, PPS and time measure, and third 
board the Navicom GPS receiver board.

Features an OSA 8663-B6SG double-oven SC-cut, a Navicom GPcore Sync 15 GPS 
receiver, based on the Zarlink GP4020 chip, and a RAKON 10 MHz reference.

Are you going to swap out the DC-DC module?

Oscilloquartz SA
Avenue des Pâquiers 1
2072 Saint-Blaise
Switzerland

SyncView Plus
http://oscilloquartz.com/files/1403600295-2014-06_DS_OSASyncViewPlus.pdf

greg
Sent from iPad Air
==
From: Mark Sims 
To: "time-nuts@febo.com" 
Subject: [time-nuts] Oscilloquartz OSA-4530 GPSDO

The 4530 GPSDO arrived, but was dead.   Looks like the DC-DC that makes 5V is 
bad.   The seller sent a replacement unit that seems to be working.  

Also a list member sent me a copy of the 4531 manual.  The commands listed are 
very similar to the Star-4 commands.  But sending any of the 4531 commands to 
the 4530 returns an "invalid command" response... strange, the 4531 manual sort 
of implies most should work with the 4530. 

So, I'm still looking for a 4530 manual or the OSA control software...  does 
anybody know where I can find it?

--

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Re: [time-nuts] Discussion of precise time and frequency measurement

[Gregory Beat]

I grew up east of the Iowa/Missouri border, so this boundary dispute was 
well-known ... and occurred at same time Joseph Smith (Mormons) was at Nauvoo, 
IL (1839-1844).
In 2006, the Iowa-Missouri border was investigated with GPS, as much an 
archeology project as locating the historic Sullivan & Brown survey markers.
http://www.theamericansurveyor.com/PDF/TheAmericanSurveyor_MO-IABoundaryLineInvestigation_Mar-Apr2006.pdf
Iowa-Missouri Border War (1826-1849)
http://iagenweb.org/history/soi/soi32.htm

NOAA’s : National Geodetic Survey (NGS) made news in 2009 when media reported 
that the Four Corners monument was in wrong place (by 2.5 miles).
Deseret News
https://www.deseretnews.com/article/705299160/Four-Corners-Monument-is-indeed-off-mark.html
NOAA statement and clarification
https://www.ngs.noaa.gov/INFO/fourcorners.shtml
==
I’m in France and I don’t think that any borders in Europe were defined by 
astronomical observation, but in the US I believe that at least some of the 
state borders were thus fixed. As a second’s error in time will be about a 
nautical mile in US latitudes, I wonder if anyone has measured with GPS, how 
good the original surveys were?

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[time-nuts] GPS 19x HVS Receiver/Antenna, NEMA 0183, 10 Hz update rate

[Gregory Beat]

I noticed that an eBay reseller in Las Vegas (Garmin Marine dealer) has sold 
over 275 of the Garmin GPS 19x HVS Position Receiver/Antenna packages at a 
discounted price.
eBay auction # 171415290499

Anyone try these units out?
===
There are also a few Garmin NEMA2000 units (Marine CAN bus attempt by NEMA)
from a Chinese reseller, auction # 162703815781
—

greg, w9gb
chicago

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Re: [time-nuts] RS-232 Pin Outs for the Acron Zeit WWVB LCD Clock

[Gregory Beat]

The LM-358 Op-Amp is used to Invert the Serial Data (RxD, TxD) stream.
http://www.st.com/content/ccc/resource/technical/document/datasheet/61/46/87/01/98/ed/44/c5/CD0464.pdf/files/CD0464.pdf/jcr:content/translations/en.CD0464.pdf

Coupled with the usage of an RJ11 (4P4C, modular) ... 
the connection would have to be a minimal 3-wire serial (RS-232 or TTL/UART)
https://en.m.wikipedia.org/wiki/RS-232#3-wire_and_5-wire_RS-232
Ground is easy to find, and TxD and RxD is a coin-toss (50:50) if you hook-up 
right.

greg, w9gb
===
I thought I could answer this question (Acron Zeit) easily, since I had the 
cable right
at hand. But my continuity detector gave strange results.

I opened up the D-shell and found a small circuit board with diode,
capacitors and what looks like an ST358 op amp.

Paul Alfille
==
Fri, Jul 21, 2017 at 4:27 PM, Philip Jackson <> wrote:
Does anyone have the serial pinout info for the Acron Zeit clock?
---
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[time-nuts] WWV 25 MHz antenna switched to circular polarization

[Gregory Beat]

As reported by ARRL, a few days ago, on July 7th the 25 MHz antenna for WWV was 
changed to circular polarization.
http://www.arrl.org/news/wwv-25-mhz-signal-swapped-to-circular-polarization

Matt Deutch, N0RGT the Lead electrical engineer at WWV said it’s hoped that the 
latest antenna change to circular polarization might be helpful to anyone 
studying radio propagation (ionosphere) during next month’s total solar eclipse 
(August 21, 2017), which will be visible across the US.
“My effort right now is focused on getting the word out, just to make people 
are aware that [the 25-MHz signal] is available, if it can be useful to them.”

greg, w9gb
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[time-nuts] Happy Palindromic Days, m-dd-yyyy format

[Gregory Beat]

A palindrome is a word, phrase, number, or other sequence of characters which 
reads the same backward as forward, such as the words: madam, racecar, or 
tattarrattat.

Palindrome Days start with July 10, through July 19.
https://www.timeanddate.com/date/palindrome-day.html

7-10-17 backwards is 7-10-17
7-19-17 backwards is 7-19-17
==
w9gb
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[time-nuts] Symmetricom 58532A Antennas - For Sale

[Gregory Beat]

David Zoldan, at Launch 3 Telecom, contacted me this morning.
He has acquired more Symmetricom 58532A GPS L1 Reference Antennas.

As posted in 2016, Launch 3 will sell these antennas for $25 each plus shipping,
to [time-nuts] list members.

FAQ regarding these Microsemi (Symmertricom) 58532A antennas
https://www.microsemi.com/document-portal/doc_view/133381-58532a

Launch 3 also received a large supply of 900 MHz Yagi antennas (ZDA brand)
http://www.wlanmall.com/900-mhz-17-dbi-yagi-antenna-902-928-mhz-13-element/
BUT, I told David that interest may be low (time-nuts) for that item.

Greg, w9gb
---
I asked him to check his recent surplus acquisition for GPSDO equipment,
such as GPS receivers, frequency stds, Rb oscillators, Lucent boxes, etc.
He said, "I have large quantity of the "hookup" accessories (coax, connectors, 
brackets)
===
CONTACT Information for Orders (Telephone probably best, then e-mail).
David Zoldan
Chief Executive Officer ,   Launch 3 Telecom
P:  877.878.9134ext. 100
E:  david.zol...@launch3.net |  W:  Launch3telecom.com
A:  27 Daniel Rd West, Fairfield, NJ 07004

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Re: [time-nuts] Problems with TAPR Oncore M12+ kit

[Gregory Beat]

Yes, agree.

Since your TxD LED is not blinking (~1 sec), then the Oncore receiver is not 
transmitting data (TTL serial).

PWR—This LED should always be GREEN when power is applied to the GPS Kit.

TxD—The TxD indicator provides the user with visual feedback concerning data 
output from the receiver. The TxD LED will momentarily flash RED whenever the 
GPS Kit is sending GPS data to the host computer.

RxD—The RxD indicator will flash RED whenever commands are received from the 
host computer.

1PPS—The 1PPS indicator will flash RED whenever a 1PPS pulse is output from the 
GPS receiver. There are 2 user defined Modes of operation for the 1PPS LED 
indicator, that can be configured/programmed (Oncore commands).

greg, w9gb
===
From: Chris Waldrup 

Has anyone else received a TAPR unit they can't get to work?
I got my unit finally boxed up a few weeks back. 
The PPS LED flashes and power LED and RXD LED's light but the TxD doesn't.
No serial communications, unfortunately. 
I've found a Oncore M12 board on eBay coming from China and this should come in 
a few weeks. 

Chris
KD4PBJ

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Re: [time-nuts] Problems with TAPR Oncore M12+ kit

[Gregory Beat]

Chris -

I was not aware that you were having issues with the TAPR Experimenters Kit.
I am finishing a DIY GPS kit build from "assorted parts sources" for Jim Pruitt.
Jim missed purchasing the TAPR kit in May 2017 (sold out before he ordered).
--
I acquired ($) a Synergy SynPaQ/E carrier board with a dead M12+ receiver.  
Since I happen to have a couple spare Oncore M12+ boards (inventory, working), 
it was just a matter of swapping those receiver boards.
--
You need to be careful in selection of the GPS antenna, since there are a wide 
variety on the surplus market: Passive (no pre-amp); Active with different 
voltage requirements (12, 5, or 3.3 VDC) from GPS receiver.
At the electronics bench, I try to use 5 Volt antennas (or 3.3V that are 5v 
tolerant) with similar GPS receivers (5V preferred).

greg
w9gb

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Re: [time-nuts] Lucent RFTG-u REF-0 Standalone (Dan Watson)

[Gregory Beat]

Dan Watson (New Zealand) appears to have abandoned this Lucent KS-2436 Ref-0 
GPSDO project (standalone operation).

Earlier this week, I noted Lucent KS-2436 units being sold on the TradeMe web 
site (New Zealand). Listing: 1356761279 and 1356761447
http://www.trademe.co.nz/electronics-photography/other-electronics/other/auction-1356761279.htm
"I'm selling this gear (Lucent) as I don't have the time to complete this 
project. 
I bought everything included brand new, but I can't provide any warranty." 
--amc184 (seller)
===
My June 6, 2017 query/update.
--
Starting in August 2015, Dan Watson (Sync Channel Blog) started a project to 
develop a GPS board to "plug into" the Lucent KS-24361, RTFG-u REF-0 for 
standalone operation (without the REF-1 module)
http://syncchannel.blogspot.com/2015/08/standalone-operation-of-lucent-ks-24361.html

By October, he had a GPS board (Tria) that converted uBlox timing receiver 
output to the format desired by Lucent box (Motorola Oncore UT).
http://syncchannel.blogspot.com/2015/10/tria-gps-success-in-ref-0.html
His last post in November 2015 was about dongles for the REF-0.
http://syncchannel.blogspot.com/2015/11/denuo-gps-hits-rev-b-dongles.html

In 2016 he posted his later development work on OSHPark, but stopped Blog 
posting about a year ago.  Anyone have an update?  He has commented in past 
that he is easily distracted. 

greg, w9gb
===
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Re: [time-nuts] GPS splitter

[Gregory Beat]

I have reached the point that I need a 4-port splitter for my GPS antenna 
(outdoor 5 volt).  Any recommendations of models (HP/Symmertricom/Microsemi) to 
acquire OR to avoid??

greg
---
> I've decided I need more clocks :)
>
> Dave

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Re: [time-nuts] TAPR GPS Experimenters Kit

[Gregory Beat]

What is your DC power source?
https://www.tapr.org/images/com-cbl.jpg

I used pin 7 (Black, DC GND) and pin 8 (Red, +8 to +32 VDC)  
and old +12 VDC, 1 Amp Wall Wart for my build.

greg
w9gb

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[time-nuts] BTTF : Austron 1210-C Crystal Clock

[Gregory Beat]

BTTF : Back to the Future "moment"

Austron was a company based in Austin, TX that manufactured crystal clocks for 
military and industry in late 1970s.  Leap Second has a series of photos.
http://www.leapsecond.com/museum/au1210/

Austron 1210-D Manual (digital model)
Product produces 1 MHz and 5 MHz sine wave.
http://www.to-way.com/tf/1210D.pdf

Used Austron 1210-C appeared on eBay, auction # 282490626815
BUT at $900 ... seller in King George, VA obviously thought he found gold.
** must be heat exhaustion **

greg
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Re: [time-nuts] TAPR GPS Experimenters Kit

[Gregory Beat]

I am looking for a spare Alubos ABP 800 series enclosure (115mm length),
mounting flanges are not required.
Some time-nuts readers noted in April, they had "extra" Alubos 800 enclosures 
(Bopla).

The TAPR GPS Experimenters kit (Synergy SynPaQ/E) used a custom Alubos case --
115mm in length with mounting flanges.

Contact me "Off List" regarding availability.

The Alubos # ABP 800 series "off-shelf" lengths are 100mm and 150mm.
https://www.bopla.de/en/enclosure-technology/product/alubos/alubos-800-enclosure-profiles/abp-800-0150.html

greg, w9gb
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Re: [time-nuts] Lucent RFTG-u : DE-9 connector (sliding lock)

[Gregory Beat]

FCT Electronics catalog pages.
http://www.mouser.com/ds/2/276/Zubehoer_DSub_Steckverbinder-472747.pdf

NOTE: European mfg. (like FCT) sell both 4-40 (English) and M3 (metric 
hardware).
Purchase correct size.
In addition to Sliding latch, you will also find plastic and metal dust caps.
That may be of interest for other Lucent RFTG-u owners.
CAUTION: D-subminiature latches should only be used in permanent or non-mobile 
equipment.  WHY?  
I watched computer equipment (tens of thousands of $$) -- dropped to floor -- 
by the pulling of cable (wiring tech -- reassigned after incident).

gb
Sent from iPad Air

> On Jun 10, 2017, at 4:32 PM, Gregory Beat <w...@icloud.com> wrote:
> 
> Jerry -
> 
> I noted that no one answered your query from April.
> D-subminiature connectors were introduced by Cannon in 1952.
> https://en.m.wikipedia.org/wiki/D-subminiature
> 
> That "sliding lock" (or latch) method for attachment was common with AUI 
> connections (15-pin size)  for the original Ethernet (10-Base-5) in late 
> 1970s and 1980s.
> 
> SPEC DETAILS matter here, you require 9-pin (DE-9 style).
> Pull up the Data sheet for the mfg. you select (FCT, Harting, NorComp),
> to assure you purchase all necessary pieces required.
> 
> Mouser Electronics carries these parts.
> http://www.mouser.com/Connectors/D-Sub-Connectors/D-Sub-Tools-Hardware/_/N-9gyd6?P=1z0yhcsZ1yz0n4z
> 
> Digi-Key also carries these "locking" parts
> https://www.digikey.com/products/en?mpart=09670009914=1195
> Example drawing (Harting)
> https://b2b.harting.com/files/download/PRD/PDF_TS/09670009914_BL01_R29760_100198914DRW002A.pdf
> 
> good luck  I assembled / repaired far too many of these 35 years ago.
> 
> greg
> w9gb
> 
> 
> 
> --
> Hello, I’ve been using regular D-subminiature shells (DE-9 size) to hold the 
> power connector onto the REF0 and REF1 and they come loose when I mess with 
> the units.  I’ve been looking all over today and can’t find the specific 
> shell type that I need to use to clamp onto the D-sub connector.  
> The REF0 and REF1 have small round discs that probably use a shell that is 
> more of a clamp opposed to a screw-down type.  Where can I find the proper 
> D-sub shells?
> 
> Thanks,  Jerry
> 
> 
> Sent from iPad Air
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Re: [time-nuts] Lucent RFTG-u : DE-9 connector (sliding lock)

[Gregory Beat]

Jerry -

I noted that no one answered your query from April.
D-subminiature connectors were introduced by Cannon in 1952.
https://en.m.wikipedia.org/wiki/D-subminiature

That "sliding lock" (or latch) method for attachment was common with AUI 
connections (15-pin size)  for the original Ethernet (10-Base-5) in late 1970s 
and 1980s.

SPEC DETAILS matter here, you require 9-pin (DE-9 style).
Pull up the Data sheet for the mfg. you select (FCT, Harting, NorComp),
to assure you purchase all necessary pieces required.

Mouser Electronics carries these parts.
http://www.mouser.com/Connectors/D-Sub-Connectors/D-Sub-Tools-Hardware/_/N-9gyd6?P=1z0yhcsZ1yz0n4z

Digi-Key also carries these "locking" parts
https://www.digikey.com/products/en?mpart=09670009914=1195
Example drawing (Harting)
https://b2b.harting.com/files/download/PRD/PDF_TS/09670009914_BL01_R29760_100198914DRW002A.pdf

good luck  I assembled / repaired far too many of these 35 years ago.

greg
w9gb



--
Hello, I’ve been using regular D-subminiature shells (DE-9 size) to hold the 
power connector onto the REF0 and REF1 and they come loose when I mess with the 
units.  I’ve been looking all over today and can’t find the specific shell type 
that I need to use to clamp onto the D-sub connector.  
The REF0 and REF1 have small round discs that probably use a shell that is more 
of a clamp opposed to a screw-down type.  Where can I find the proper D-sub 
shells?

Thanks,  Jerry


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[time-nuts] TruePosition --> Skyhook!

[Gregory Beat]

On February 19, 2014, TruePosition (a Liberty Media company) of Berwyn, PA 
bought Skyhook of Boston, MA.
http://www.vcpost.com/articles/21778/20140220/us-wireless-location-firm-trueposition-buys-skyhook-wireless.htm

Combining their expertise and experience, 
they are now operating under the Skyhook brand name.
---
Regarding information on these True Position GPS / 10 MHz boards.
William Townsend worked there for 16 years, last position as Director of 
Embedded Software and Hardware Development.
https://www.linkedin.com/in/williamtownsendbsee/





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Re: [time-nuts] TruePosition on the Arduino

[Gregory Beat]

Ben -
I assume that you never received the Arduino "C code" 
written by Bruce, WA3YUE for the original project?

Club's Powerpoint presentation indicated that source code was available.
http://www.packratvhf.com/techinal.htm

Packrat GPS Project (Gary, WA2OMY; Bruce, WA3YUE; George, KA3WXV) with 
TruePosition GPSDO and Arduino
by The Mt. Airy VHF Radio Club "Pack Rats" (Southampton, PA).
http://www.qsl.net/wa2omy/A%20Packrat%20GPS%20Receiver%20Project.pdf

greg, w9gb
==
> original message / digest <
I'm getting to the point that once I've got the button logic working, I'll send 
out my source to anyone who wants to take a look at it or use it.  
I will stipulate one condition - you can't make too much fun of how poorly 
programmed it is.  ;)
thanks much and 73,
ben, kd5byb
==
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[time-nuts] Lucent RFTG-u REF-0 Standalone Operation (Dan Watson work)

[Gregory Beat]

Starting in August 2015, Dan Watson (Sync Channel Blog) started a project to 
develop a GPS board to "plug into" the Lucent KS-24361, RTFG-u REF-0 for 
standalone operation (without the REF-1 module)
http://syncchannel.blogspot.com/2015/08/standalone-operation-of-lucent-ks-24361.html

By October, he had a GPS board (Tria) that converted uBlox timing receiver 
output to the format desired by Lucent box (Motorola Oncore UT).
http://syncchannel.blogspot.com/2015/10/tria-gps-success-in-ref-0.html
His last post in November 2015 was about dongles.
http://syncchannel.blogspot.com/2015/11/denuo-gps-hits-rev-b-dongles.html

In 2016 he posted his later work on OSHPark, but stopped Blog posting about a 
year ago.
Anyone have an update?  He has commented in past that he is easily distracted. 

greg, w9gb

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Re: [time-nuts] TAPR GPS Experimenters Kit

[Gregory Beat]

Mark -
Yes, it does. :-)
The "S" and "!" menus are the most frequent menus I use with LH.

Jerry is using SynTAC.
After a few e-mail exchanges, off-list, problem was antenna location.

gb
===
So does Lady Heather... the "S" menu control things like self-surveys, entering 
fixed position coordinates,  and the receiver operating mode.  SN will put it 
in Navigation (3D) mode.  SH will put it in position Hold mode (timing mode).  

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[time-nuts] CRS-11: NICER to ISS (SEXTANT demo)

[Gregory Beat]

Celestial Navigation for Deep Space (and Timing) ... 
interesting data measurements, experimentation and demonstration.
SpaceX has the NICER experiment in its "trunk" unpressurized cargo area.
--
NICER : Neutron star Interior Composition ExploreR
https://www.nasa.gov/mission_pages/station/research/experiments/1966.html
Neutron stars, the glowing cinders left behind when massive stars explode as 
supernovas, are the densest objects in the universe and contain exotic states 
of matter that are impossible to replicate in any lab. They shine most brightly 
in narrow beams that sweep the sky as the stars spin; from a great distance, 
they appear to pulse like lighthouse beacons (hence the name “pulsars”). From 
its perch aboard the International Space Station (ISS), the Neutron star 
Interior Composition Explorer (NICER) payload studies the extraordinary physics 
of these stars, providing new insights into their nature and behavior. 
Through the embedded Station Explorer for X-ray Timing And Navigation 
Technology (SEXTANT) demonstration, it may pave the way for a future GPS-like 
system for spacecraft navigation anywhere in the Solar System using pulsars 
(known timing sequence) as natural beacons.

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[time-nuts] C-SPAN broadcast GPS History, via Internet

[Gregory Beat]

Global Positioning History
https://www.c-span.org/video/?427553-2/global-positioning-system-history
Global Positioning System History Richard Easton and Eric Frazier talked about 
the history and evolution of the global positioning system, or GPS. They spoke 
about its early days as an American spy tool during the Cold War and tracked 
how its usage changed over time. They also explored America’s military, 
commercial, and personal dependence on the device. 
---
C-SPAN sent me alert about availability of this May 5th recorded session.

greg
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Re: [time-nuts] TAPR GPS Experimenters Kit

[Gregory Beat]

Jerry -

I rarely use "raw" Oncore M12 commands these days, using one of the 3 common PC 
programs: Lady Heather, TAC32/SynTAC, M12Oncore(old Moto pgm).

How are you routing that 1 PPS signal?  Does your front LED pulse?
I wire 1 PPS to the DCD pin (DE-9M, standard RS-232), TAC32 can be configured 
for "which pin" (DE-9M) to sense that PPS signal.  
This is why I prefer to use Mark Sims' Lady Heather or Rick Hambly's TAC32.  
TAC32 program has a quick setting for config. receiver as Timing or Navigation.

IF you continue to have issues, perform the Hardware Reset (Lady Heather).
That will return your receiver to default factory with cleared settings.

greg
---
Greg, Funny.  
Some of the Lucent boxes have been in strange places as well.  
Can you please check your PPS to see if you get a signal when in that other 
mode (where it needs at least one sat locked)?

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Re: [time-nuts] TAPR GPS Experimenters Kit

[Gregory Beat]

Received a note from John Koster, W9DDD that TAPR had one complete GPS kit left.
https://www.tapr.org/gps_exp-kit.html

Received #CAB083 (2.1mm DC Barrel Jack to Bare Wire/"Pigtail") this morning via 
AirMail.  
https://www.moddiy.com/products/2.1mm-DC-Barrel-Jack-to-Bare-Wire-%28Open-End%29.html
Took about 10 minutes to finish building 2 adapter cables for the two kits.
I will have to post photos.

I used an old Linksys router power adapter (12VDC, 1A) for power and an old 
Motorola ANT62301 "HockeyPuck" antenna (Marine screw-base) on the patio (some 
obstructions).
http://www.dvq.com/stan/041127/TN-491B-motorola-gps-antenna.pdf

I could not get TAPR/CNS Systems TAC32 software to work under latest update of 
Windows 10 (I'll have to ask Rick, W2GPS about that).

Lady Heather, version 5 came to the rescue (Thank you Mark Sims).
Lady Heather recognized the Motorola M12 receiver quickly.

I performed a Hardware Reset and then started the Standard Survey.  
After about 10 minutes it was tracking, and continuing survey.

I did read the old coordinates and date from one M12 receiver  
it last operated in 2014 and its coordinates placed it in middle of Indian 
River, west of Melbourne, FL (Space Coast).
Many laughs about why the last report was in river:
1.) dropped off a barge or boat
2.) partially recovered from a Falcon 9 booster
3.) throwing contest from shore
--
greg, w9gb

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Re: [time-nuts] GPS Kit Plates

[Gregory Beat]

Jerry -

Yes, from the GPS DE-9M connector to the PC (RS-232) and the DC power source.
I have been DIY building D-subminiature cables since 1980 (parts not an issue).

The SynPaQ/E version XTS (DE-9M) pin assignments are "non-standard" (not 
RS-232) and include DC power input, as well as 1 PPS output.  The wiring 
configuration is from the original Motorola "XT" Oncore and Synergy’s “XTS/II” 
OEM GPS Sensors (1990s).
This SynPaQ/E DE-9M wiring provides backward compatibility and a single 
connection for data I/O and DC power.
https://www.tapr.org/pdf/tapr-gps-kit.pdf

greg, w9gb

Sent from iPad Air

> On May 27, 2017, at 4:14 PM, Jerry Hancock <je...@hanler.com> wrote:
> 
> Greg, to which adapter cable are you referring?  From the PC to the DB9?
> 
> What I did in the meantime was use breadboarding jumpers.  The square female 
> ends typically will press onto the DB9 male pins.
> 
> Glad they fit your need.
> 
> Steve, sounds like there won’t be another round?
> 
> Jerry
> 
>> On May 27, 2017, at 2:04 PM, Gregory Beat <w...@icloud.com> wrote:
>> 
>> Steve and Jerry -
>> 
>> Thank you for coordinating the acquisition and machining of these End Panels 
>> for the TAPR GPS Experimenters Kit.  I understand these kits (SynPaQ/E 
>> version XTS) are EXHAUSTED at TAPR.  Check the TAPR web site for details.
>> https://www.tapr.org/gps_exp-kit.html
>> 
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Re: [time-nuts] GPS Kit Plates

[Gregory Beat]

Steve and Jerry -

Thank you for coordinating the acquisition and machining of these End Panels 
for the TAPR GPS Experimenters Kit.  I understand these kits (SynPaQ/E version 
XTS) are EXHAUSTED at TAPR.  Check the TAPR web site for details.
https://www.tapr.org/gps_exp-kit.html

The End Panels arrived from Jerry this afternoon (Saturday, USPS Priority).
They were well packed and I found no oil on my end panels.

The VCC lens cap and 
http://www.mouser.com/ProductDetail/VCC/CMS322CTP/?qs=YfTKvZjIiZx%2FK6G184oH6A%3D%3D
Retaining ring (Mouser) for Front Panel LEDs fit perfectly.
http://www.mouser.com/ProductDetail/VCC/RNG_268/?qs=%2fha2pyFaduhfGvQXQvy97Y4tfuHua2s5JninzMNF16XefMczA6YdRg%3d%3d

The TAPR kit does not include the "jack screws" for the DE-9 connector.
I had these in my parts drawer, Jameco part number: 16548 (75 cents/set).
http://www.jameco.com/z/14-522-R-Jack-Screw-Nut-Washers-Set-4-40-Hex-0-187-W-x-0-187-H-x-0-315-L-Thread_16548.html

The kit Looks Great (like new).  Now to build the Adapter Cable this weekend.
https://www.tapr.org/images/com-cbl.jpg

greg, w9gb

> Subject: [time-nuts] GPS Kit Plates
>
> Hello again, fellow curmudgeons,
>
> I sent out more shipping notices this morning and plan to hit the PO in about 
> 5 hours.
>
> When you receive your plates and prior to mounting, please clean them with 
> soap and > water or even windex or simple green.  I cleaned the machine oil 
> off to the limit of my > patience but there might be a little left.  I’ve not 
> seen any interaction between the  
> machine oil, windex, etc with the coating.
>
> Regards,
>
> Jerry



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Re: [time-nuts] TruePosition and Arduino Progress

[Gregory Beat]

Possible typo?
UpdateDisplay()

greg
===
void loop()
{
getSerialString()  // uses serial.available to pull in the serial data

parser()  // this parses the data

wait for 1PPS tick to go high

if there has been a clock message, updateDispay()  // update the display
}
===
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Re: [time-nuts] Surplus Lucent RFTG-m-II units in rack shelf

[Gregory Beat]

As noted by Bob Camp, this Lucent pair has a rubidium standard and OCXO.
Since I posted (15 hours ago), he has sold 18 units.

So, would love to hear reports (good, bad, time ugly) next week.

Greg

> I noticed this surplus Lucent KS-24019 L108 / L109 item on eBay, 
> auction # 132186030112, by a01mhowa , based in South Carolina.
> 



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[time-nuts] Surplus Lucent RFTG-m-II units in rack shelf (eBay)

[Gregory Beat]

I noticed this surplus Lucent item on eBay, auction # 132186030112
by a01mhowa , based in South Carolina.

KS-24019 L108 / L109 rack unit appears to be commercial CDMA site pulls with 
interconnection cables.
Seller states he has more than 10 units.

greg, w9gb

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Re: [time-nuts] Looking for a HP-58503 display

[Gregory Beat]

Internet Fishing expedition, produced some cross-references :-)

Keysight 34401 DVM --> Service Guide, page 133.
http://www.keysight.com/upload/cmc_upload/All/34401-90013-mla2.pdf

34401-66512 – Display Assembly (A2) 
Vacuum Florescent Display (VFD) was OEM CP3033A (Noritake part).

Noritake VFD Basics
https://www.noritake-elec.com/technology/general-technical-information/vfd-operation

Some EEVBlog readers attempt VFD rejuvenation
https://www.eevblog.com/forum/chat/vacuum-fluorescent-display-rejuvenation/

greg

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> On May 9, 2017, at 10:46 PM, Gregory Beat <w...@icloud.com> wrote:
> 
> SAMSUNG SSVD INB-12MM52T
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Re: [time-nuts] Looking for a HP-58503 display

[Gregory Beat]

Mark -

Keysight MAY have that spare VFD still in stock (German office supposedly had a 
few).
Several HP-34401A DVM owners have used that Chinese source for replacement.
The display model being sold appears to be: SAMSUNG SSVD INB-12MM52T

Good luck !

greg

> I looked closely at the display and can see unused annunciators for 
> frequency, us, period, etc.
> So the display is the same as used in at least one of their frequency 
> counters.  
> The display is a 12 character 14-segment display.   
> There is a possibility that a HP-34401A display might work.   
> Those are available from China for around $50.
> - Mark


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Re: [time-nuts] Looking for a HP-58503 display

[Gregory Beat]

Mark -

Option 001 for the HP-5803B GPSDO
featured a 12-character (alphanumeric) Vacuum Fluorescent Display (VFD).
It appears to have been a custom VFD for HP / Agilent (Colons used in time 
display).
http://www.leapsecond.com/museum/hp58503a/097-58503-13-iss-1.pdf

Noritake Itron Corp. (Ise Electronics Corp.) of Japan invented the VFD 
technology in 1967.  Noritake, Newhaven, Futaba, Samsung, and a Chinese mfg. 
are the 5 major mfg.
Three of these companies have their North American HQ offices here in Chicago 
area.

Futaba in Schaumburg
http://www.futaba.co.jp/en/display/vfd/lineup.html

Noritake Itron Company in Arlington Heights
https://www.noritake-elec.com/

Newhaven Display in Elgin
Company is more of an East Asian importer, but handles custom runs.
http://www.newhavendisplay.com/vfd-c-586.html

VFD do have a finite life, and darken as they age.  Samsung states 30,000 hours 
to reach it 80% level (brightness).  You stated your unit has 83,000 hours.
DOUBLE CHECK DC Power and electrolytic capacitors associated with circuit, this 
has been known issue with commercial consumer appliances with VFD.
The mfg. date on your unit may have been during "bad caps" decade. 

greg
w9gb
==
> I recently got in an HP-58503B GPSDO from a local equipment liquidation 
> auction.  
> The unit has 83,000 hours of run time.  I think it was last powered up in 
> 2013.   
>
> The display (VFD) is a bit dim and blotchy.   
> Does anybody have a replacement display that would look better?
> - Mark
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Re: [time-nuts] Trimble GPS board (65256, 57963)

[Gregory Beat]

The "Trimble 57963-C" and "Symmetricom UCCM 089-03861-02" boards were 
previously discussed in August 2015.  Over the past few weeks, the prices have 
decreased recently.

Sergiy in Kyiv, Ukraine reverse engineered some of the pin functions on 
the 50-pin connector of these OCXO boards.
http://tipok.org.ua/node/53

These modules have no direct NMEA support, but have their own binary protocol 
and additional signals, available on the 50-pin connector.  Should be useful 
for stable 10MHz and 1PPS signals.
Notes on UCCM-P >
http://abelian.org/vlf/tmp/notes-57963.txt
--
EEVBlog also commented in these Trimble units (supposedly BG7TBL uses in some 
products).
https://www.eevblog.com/forum/projects/trimble-65256-5v-10mhz-as-fitted-in-trimble-gpsdo-and-some-bg7tbl-output-level/

Andy Brown's Teardown Blog of the BG7TBL GPSDO
http://andybrown.me.uk/2016/11/12/gpsdo-ebay/
YouTube Video
https://m.youtube.com/watch?v=vH1q_Mh4luY

greg
w9gb

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Re: [time-nuts] TruePosition GPS Receiver

[Gregory Beat]

I have had some luck sending inquiries to Furuno USA (who sent query to East 
Asia).
http://www.furunousa.com/Support/Default.aspx

Last time I sent a query,
It was for a Furano GPS receiver used in an integrated timing receiver/outdoor 
antenna.
Received original Japanese spec sheet with some broken English translations.
Fortunately, schematic was included.

greg
w9gb
 
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[time-nuts] TruePosition GPS Receiver

[Gregory Beat]

Interesting surplus GPS receiver / 10 MHz item on eBay
http://www.ebay.com/itm/GPS-Receiver-board-from-TruePosition-GPS-locator/152340314423?
TruePosition GPS Receiver/10 MHz oscillator, auction number: 152340314423

Supposedly, this receiver is extracted from Time Position LMU300 model 101333.
Rack unit used at cellular sites, the LMU Universal system assisted to 
determine mobile phone location: emergency, 911 systems, etc.
Lots of parts :-)
http://www.ebay.com/itm/TruePosition-LMU300-GPS-Navigation-model-101333-/162267042516?hash=item25c7de92d4:g:wEgAAOSwAvJW~UIi

The Mt. Airy VHF Radio Club ("Pack Rats"), Southampton, PA
has a technical article 
http://www.packratvhf.com/techinal.htm
for adapting a related True Position receiver 
by Gary, WA2OMY and Bruce, WA3YUE
http://www.qsl.net/wa2omy/A%20Packrat%20GPS%20Receiver%20Project.pdf

The Mt. Airy group used an Arduino and other common parts for interfacing.

greg
w9gb

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Re: [time-nuts] TAPR Oncore M12+ kit

[Gregory Beat]

I received a response from Karl Kvick at Digi-Key,
they will not be stocking this specific model or part (panels).

Greg
w9gb

Sent from iPad Air

> On Apr 28, 2017, at 11:24 AM, Gregory Beat <w...@icloud.com> wrote:
> 
> I have an e-mail inquiry at Digi-Key (Friday),
> since they are a US distributor for this mfg. and enclosures.
> Awaiting their reply.
> 
> greg
> w9gb
> 
> Sent from iPhone 6s
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Re: [time-nuts] TAPR Oncore M12+ kit

[Gregory Beat]

Motorola Oncore VP/UT+/GT+ Interface Board SemiKit by McKinney Technology
Instructions and Schematic diagram by Doug McKinney, KC3RL (SK, 2006)
http://www.tapr.org/pdf/vpguib.pdf

greg
w9gb

Sent from iPad Air

> On Mar 28, 2017, at 1:47 PM, Gregory Beat <w...@icloud.com> wrote:
> 
> Larry -
> 
> Interface Boards for Motorola (and Garmin) receivers have been discussed (and 
> sold) by TAPR since late 1990s.  TAPR archives all of this documentation, for 
> discontinued GPS kits, can be seen on the left margin.
> https://www.tapr.org/gps_exp-kit.html
> 
> Tom Clark, W3IWI Total Accurate Clock (TAC) project (1996) covers the entire 
> topic.
> https://www.tapr.org/kits_tac2.html
> 
> Simple interface board schematics (Serial Level converters, and voltage 
> adjustments for external antennas/ 3.3 or 5 V) can be found throughout the 
> Internet since mid-1990s.
> Numerous radio amateurs DIY their own (breadboard) or sold small interfaces 
> at hamfests (1996-2006), until newer GPS solutions became surplus (and 
> smartphones with built-in GPS appeared after 2007).
> 
> Doug McKinney, KC3RL (SK, December 2006) offered interface boards for the 
> Garmin (GPS-25) and Motorola receivers until about 2005.  I have one of 
> Doug's boards in my GPS parts box.  These were sold by TAPR until their 
> inventory was exhausted.
> --
> Garmin
> https://www.tapr.org/gps_garminib.html
> Motorola
> https://www.tapr.org/gps_vpib.html
> 
> Synergy M12-MB board (web link to photo [jpg] below)
> IF you look closely at the Synergy Board, you see the board outline and 2x5 
> (10-pin) header for the earlier 8-channel Motorola receivers
> https://www.tapr.org/images/M12-MB.jpg
> 
> greg
> w9gb
> 
> Sent from iPad Air
> 
>> On Mar 28, 2017, at 12:18 PM, Larry McDavid <lmcda...@lmceng.com> wrote:
>> 
>> What "OEM supplier?" Do you mean from Synergy Systems? Or, is there an 
>> enclosure supplier to Synergy?
>> 
>> Do you know if there is a schematic of the Synergy interface board available?
>> 
>> Larry W6FUB
>> 
>>> On 3/27/2017 9:31 AM, Gregory Beat wrote:
>>> The TAPR offering is a "partial kit" from the Synergy's SynPaQ/E product.
>>> Here is that data sheet:
>>> http://www.synergy-gps.com/images/stories/pdf/synpaq%20product%20data%20sheet%20040110.pdf
>>> Blank aluminum end-plates can be fabricated, or purchased from the OEM 
>>> supplier.
>>> 
>>> w9gb
>> -- 
>> Best wishes,
>> 
>> Larry McDavid W6FUB
>> Anaheim, California  (SE of Los Angeles, near Disneyland)
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Re: [time-nuts] UltrAtomic® Clock

[Gregory Beat]

My long-time (and accurate) 12-inch analog kitchen clock (24 years) dropped to 
floor in March, as I was adjusting for Daylight Savings Time.  Of course, the 
polycarbonate lens cover cracked and I could not find a replacement.  The 
manufacturer, General Time of Athens, GA (handled Seth Thomas, others) closed 
their operations in 2000.
===
So, I decided to order the LaCrosse UltrAtomic® clock.
My experience, in setting it up this clock, was the same as noted by Larry.  
Took less than 90 minutes ... and agrees with my GPS/NTP server with IRIG 
displays.

One caveat, while the clock was well packed, I heard a "rattle".  
Sometime, during this clock's assembly, the portion of the plastic retention 
lip for the glass/aluminum frame was broken off at the top (aggressive 
assembler or flaw in plastic molding?).
Since I purchased the clock directly from LaCrosse, I sent them photos.
They are sending a replacement clock with a return label for this one.

greg
w9gb
Sent from iPad Air
--
From: Larry McDavid 
Subject: [time-nuts] UltrAtomic® Clock

When I got home after my Thursday Lunch meeting today, my new La Crosse 
404-1235UA-SS UltrAtomic® clock was waiting. I unpacked it and installed two 
(of 4 possible) C-cells and set it on the floor upstairs near the center of my 
home, fully under the radiant barrier insulation that has foiled (that's a 
pun!) all my previous "Atomic" clocks. The hands moved around 4 hours and 
stopped. I left.

Returning about an hour later, the clock had set itself correctly!

I verified the displayed time against my (Tindie) GPS Clock and the seconds and 
seconds-tick match as closely as I can determine visually.
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Re: [time-nuts] TAPR Oncore M12+ kit

[Gregory Beat]

TAPR list of experimenter kit "parts"
Housing without end plates
Synergy manual (hyperlink on TAPR kit page)
"GPS receiver and required support electronics in a robust, IP68 rated (IP65) 
extruded aluminum housing."

Synergy purchased that extruded aluminum housing case: 3.22” W x 5.10” L x 
1.37” H (82mm x 130mm x 35mm) from an OEM supplier, such as: 

BUD Industries
http://www.budind.com/

Elma/Optima
http://www.elma.com/en/us/?sc_lang=en

LMB/Heeger
http://lmbheeger.com/about-us.aspx

Takachi Enclosures
http://www.takachi-enclosure.com/data/p_04die-cast.html

Hammond Manufacturing (model 1455, used for Timewave Navigator)
http://www.hammondmfg.com/

greg
w9gb
==
Sent from iPad Air
> On Mar 28, 2017, at 12:18 PM, Larry McDavid  wrote:
> 
> What "OEM supplier?" Do you mean from Synergy Systems? Or, is there an 
> enclosure supplier to Synergy?
> 
> Do you know if there is a schematic of the Synergy interface board available?
> 
> Larry W6FUB
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Re: [time-nuts] TAPR Oncore M12+ kit

[Gregory Beat]

Larry -

Interface Boards for Motorola (and Garmin) receivers have been discussed (and 
sold) by TAPR since late 1990s.  TAPR archives all of this documentation, for 
discontinued GPS kits, can be seen on the left margin.
https://www.tapr.org/gps_exp-kit.html

Tom Clark, W3IWI Total Accurate Clock (TAC) project (1996) covers the entire 
topic.
https://www.tapr.org/kits_tac2.html

Simple interface board schematics (Serial Level converters, and voltage 
adjustments for external antennas/ 3.3 or 5 V) can be found throughout the 
Internet since mid-1990s.
Numerous radio amateurs DIY their own (breadboard) or sold small interfaces at 
hamfests (1996-2006), until newer GPS solutions became surplus (and smartphones 
with built-in GPS appeared after 2007).

Doug McKinney, KC3RL (SK, December 2006) offered interface boards for the 
Garmin (GPS-25) and Motorola receivers until about 2005.  I have one of Doug's 
boards in my GPS parts box.  These were sold by TAPR until their inventory was 
exhausted.
--
Garmin
https://www.tapr.org/gps_garminib.html
Motorola
https://www.tapr.org/gps_vpib.html

Synergy M12-MB board (web link to photo [jpg] below)
IF you look closely at the Synergy Board, you see the board outline and 2x5 
(10-pin) header for the earlier 8-channel Motorola receivers
https://www.tapr.org/images/M12-MB.jpg

greg
w9gb

Sent from iPad Air

> On Mar 28, 2017, at 12:18 PM, Larry McDavid <lmcda...@lmceng.com> wrote:
> 
> What "OEM supplier?" Do you mean from Synergy Systems? Or, is there an 
> enclosure supplier to Synergy?
> 
> Do you know if there is a schematic of the Synergy interface board available?
> 
> Larry W6FUB
> 
>> On 3/27/2017 9:31 AM, Gregory Beat wrote:
>> The TAPR offering is a "partial kit" from the Synergy's SynPaQ/E product.
>> Here is that data sheet:
>> http://www.synergy-gps.com/images/stories/pdf/synpaq%20product%20data%20sheet%20040110.pdf
>> Blank aluminum end-plates can be fabricated, or purchased from the OEM 
>> supplier.
>> 
>> w9gb
> -- 
> Best wishes,
> 
> Larry McDavid W6FUB
> Anaheim, California  (SE of Los Angeles, near Disneyland)
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Re: [time-nuts] TAPR Oncore M12+ kit

[Gregory Beat]

The TAPR offering is a "partial kit" from the Synergy's SynPaQ/E product.
Here is that data sheet:
http://www.synergy-gps.com/images/stories/pdf/synpaq%20product%20data%20sheet%20040110.pdf
Blank aluminum end-plates can be fabricated, or purchased from the OEM supplier.
 
w9gb

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Re: [time-nuts] Looking for GPS module (Exactime ET6000/Datum 9390-6000)

[Gregory Beat]

Heol Designs offers replacement boards for Trimble GPS receivers.
http://www.heoldesign.com/N01x-Trimble-Lassen-SK2-iQ-sQ-LP-ACE-replacements-boards

Heol Design's GPS receivers are based on the Copernicus II high performance GPS 
chip set and mimic the legacy Trimble GPS receivers.  These OEM boards are 
designed for use in embedded and industrial applications requiring high 
accuracy positioning and timing information. They can also be used as a 
replacement and upgrade for users of the Trimble Lassen iQ, SQ, LP, SK2 and ACE 
(ACEII, ACEIII) receiver boards, which are now EOL (end of life).

Some time-nuts members are using the Heol Design N024 solution in their Datum 
Tymserve 2100, which also corrects 2 additional firmware/hardware bugs.
http://www.heoldesign.com/N024-GPS-receiver-board-for-Tymserve-2100

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Re: [time-nuts] Datum 9520-1000

[Gregory Beat]

Gary -

The Datum 9520 series are Time Code Displays (discontinued).
They have been appearing via government and military surplus via obsolescence 
sales.

In addition to the 6-digit time display of the 9520 series, this specific model 
(-1000) includes the 3-digit Day of Year (DoY).
I believe that all of the 9520 series support the Amplitude modulated carrier 
(IRIG B) timecode.

Datum 9520-240 manual
http://www.arsitec.com.br/arquivos/produtos/9520-240-manualF.pdf

Datum 9520-647 manual
ftp://50-199-14-216-static.hfc.comcastbusiness.net/electronics/testgear/time-freq/symmetricom/9520/9520-647-manual.pdf

Since this Datum 9520 is discontinued, ITS (California) provides modern 
replacements, especially for F-16 fighter aircraft (9520-647 version).
http://www.itsamerica.com/Files/tcdisp.htm

greg
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Re: [time-nuts] Manual Needed, TrueTime 800 series

[Gregory Beat]

I have noted that a couple of these time-code "generators" (814 model) have 
appeared on eBay the last few weeks.
True Time 800 series manual (36 pages)
http://www.drivehq.com/file/df.aspx/shareID3748302/fileID688078998/688078998.pdf
===
> Fellow clock-tickers, 
> I have need of the equipment manual for a TrueTime 800 series TCG. 
> More specifically, model 814-319-1. 
> Worst case, I'll try contacting Symmetricom, but I'm not holding my breath on 
> that one. 
> Thanks.
> Bruce Lane, 
> Owner & Head Hardware Heavy, 
> Blue Feather Technologies -- 
> http://www.bluefeathertech.com

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Re: [time-nuts] TrueTime NTS-100: Firmware?

[Gregory Beat]

Bruce -

You may need to swap EPROMs (July 2006 thread)
http://lists.ntp.org/pipermail/questions/2006-July/010829.html

Jason Rabel posted information about the TrueTime NTS-100, a decade ago (Dec. 
2006).
https://www.febo.com/pipermail/time-nuts/2006-December/022532.html

His web site hosts the TrueTime NTS-100 manuals
http://www.rabel.org/archives/TrueTime/

Heol Designs offers a series Trimble GPS replacement boards
http://www.heoldesign.com/-Trimble-GPS-replacement-boards-

In addition, they offered a Special NO24 version (custom firmware) to address 
shortcomings of the Tymserve TS-2100.
I use the Heol Design NO24 upgrade on my TS-2100.
http://www.heoldesign.com/N024-GPS-receiver-board-for-Tymserve-2100

greg
w9gb
--
== Original Message ==

Fellow Time Travelers,
My TrueTime NTS-100 just got hit with the GPS date rollover bug
(started showing dates in the year 1997).
Does anyone have, or know of, an appropriate firmware update for this
beastie? Or is it time to recycle the thing?
Would replacing the GPS receiver board cure it? The unit seems to be
using an older Trimble unit (I'm guessing one of their 8-channel boards).

Thanks much.
---
Bruce Lane, ARS KC7GR
http://www.bluefeathertech.com
kyrrin (at) bluefeathertech dot com
"Quando Omni Flunkus Moritati" (Red Green)



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Re: [time-nuts] GPS Antenna?

[Gregory Beat]

Glenn -

These outdoor GPS antennas are PLENTIFUL via surplus.  Launch3, which offered 
NOS Symmetricom surplus antennas to this group 12 months ago, are now selling 
these surplus Ericsson KRE units (eBay).

The H inside a hexagon is the corporate logo for Huber-Suhner.
Huber is a Swiss HQ company.
http://www.hubersuhner.com/en/Products/Radio-Frequency/Antennas

This antenna, model 84097323, is listed under a variety of brand-names.
The Norwegian certification (Nemko) was likely for Ericsson KRE.

Do a Google search: "GPS Antenna 84097323" and you will find many "hits" from 
eBay and surplus resellers.

w9gb
Original Message
At the last hamfest that I attended, I bought an antenna that looks like 
a GPS antenna.  The price was right.
This is a Nemko Article number: 84097323, Type number 1315.17.0018.
It has a manufacturing date of 09/2012.
Can anyone tell me if this is in fact a GPS antenna and what voltage 
would be required.
I would suspect that it would be either 5VDC or 3.3 VDC based on the date.
Any help appreciated.
Thanks, 73
Glenn, WB4UIV
  

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[time-nuts] Looking to find an antenna for a TrueTime XL-DC

[Gregory Beat]

Here is the Manual for the True Time XL-DC (circa 1997-1999)
http://glacier.lbl.gov/gtp/DOM/Support/xl-dc-manual.pdf

gb

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[time-nuts] PCTEL 5012D-U GPS antenna/receiver

[Gregory Beat]

This PCTEL GPS antenna with integrated receiver (Wi-Sys) appeared on eBay,
auction # 252451556351
http://www.antenna.com/apg_products.cgi?id_num=11195

It is a 12-channel unit, NEMA output,
that uses the Silicon Labs (Austin, TX) CP-210X UART-USB Bridge chipset.

SiLabs Virtual COM Port (VCP) for CP-210X
https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx

Magnetic or Screw mount.
The $19.95 price includes shipping  so I have one coming (for bench 
exam/test)

PCTEL 5012D-U datasheet
http://www.antenna.com/artifacts/20158205012D-U.pdf

greg
w9gb

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Re: [time-nuts] Lucent KS-24361 REF-0

[Gregory Beat]

Dan Watson spent considerable time (2015) on standalone Lucent KS-24361 REF-0
with a "new" GPS board that would be "backward" compatible.
Not sure where he is fir project in 2016 (availability of OSHPark boards).
http://syncchannel.blogspot.com/2015/10/denuo-gps-retrofit-board.html

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Re: [time-nuts] GPS Antenna

[Gregory Beat]

It should be noted that PCTel acquired a number of antenna manufacturers 
(1999-2005),
Antenna Specialists, Micropulse, some Andrew products, Maxrad.

The GPS antenna referenced, GPS-TMG-26, is virtually identical to the 
earlier Maxrad GPS antenna that is found surplus through many venues.
http://www.antenna.com/artifacts/2010101GPS-TMG-26N.pdf
Install instructions
http://www.antenna.com/artifacts/MIS_TIMING_GPS26.pdf

For UNKNOWN used commercial GPS antennas, they are fairly generic.
Many used antennas are a patch or helical design that have an internal LNA 
powered by +5 VDC 
on the antenna line (powered from receiver) with a variety of connectors (F, 
TNC, BNC, N).
HOWEVER ... BEWARE of +12 VDC powered antennas and receivers -- 
often found with early dedicated timing solutions.
--
IF the antenna has a multi-conductor cable, it is most likely an integrated 
outdoor receiver and antenna with the cable providing voltage and data line 
using RS-485 or RS-422 standard.

greg
w9gb
>
> The GPS Antenna Micropulse Z1001 appears to be what is now 
> designated GPS-TMG-26
>

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Re: [time-nuts] GPS Antenna

[Gregory Beat]

Here is the original MaxRad GPS-TMG-26N antenna (same part number as PCTEL) 
that RF Parts is discounting (New Old Stock) for ~ $50.00
https://www.rfparts.com/antenna/antenna-antenna/gps-tmg-26nms.html
===
Launch3 cleared out surplus (new in box) Symmetricom 58532A GPS antennas
earlier this year.

greg
Sent from iPad Air

> On Jul 17, 2016, at 11:40 AM, Gregory Beat <w...@icloud.com> wrote:
> 
> It should be noted that PCTel acquired a number of antenna manufacturers 
> (1999-2005),
> Antenna Specialists, Micropulse, some Andrew products, Maxrad.
> 
> The GPS antenna referenced, GPS-TMG-26, is virtually identical to the 
> earlier Maxrad GPS antenna that is found surplus through many venues.
> http://www.antenna.com/artifacts/2010101GPS-TMG-26N.pdf
> Install instructions
> http://www.antenna.com/artifacts/MIS_TIMING_GPS26.pdf
> 
> For UNKNOWN used commercial GPS antennas, they are fairly generic.
> Many used antennas are a patch or helical design that have an internal LNA 
> powered by +5 VDC 
> on the antenna line (powered from receiver) with a variety of connectors (F, 
> TNC, BNC, N).
> HOWEVER ... BEWARE of +12 VDC powered antennas and receivers -- 
> often found with early dedicated timing solutions.
> --
> IF the antenna has a multi-conductor cable, it is most likely an integrated 
> outdoor receiver and antenna with the cable providing voltage and data line 
> using RS-485 or RS-422 standard.
> 
> greg
> w9gb
>> 
>> The GPS Antenna Micropulse Z1001 appears to be what is now 
>> designated GPS-TMG-26
> 
> Sent from iPad Air
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Re: [time-nuts] GPS Antenna

[Gregory Beat]

MicroPulse™ has been a leading brand of GPS and satellite communications 
antennas for over 15 years. Their antennas are used by many U.S. GPS receiver 
companies, as well as most branches of the U.S. Armed Forces and NATO allies.

MicroPulse
409 Calle San Pablo
Camrillo, CA 93012 US
--
The company was acquired by PCTEL, based in Bloomingdale, IL (Chicago western 
suburb -- about 10 miles from my QTH).
It is now is an Antenna Brand Name, in their portfolio of antennas.
http://www.antenna.com/index.cgi?
greg, w9gb
-
>> Can anyone help Hal?
>> Data on: GPS Antenna Micropulse Z1001
>> Lester B Veenstra  MØYCM K1YCM W8YCM
>>
---
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[time-nuts] GPS assisted 10 MHz frequency reference

[Gregory Beat]

Elector Labs (Netherlands publisher), June 14,2016
GPS assisted 10 MHz frequency reference
https://www.elektormagazine.com/news/build-a-high-precision-10-mhz-frequency-reference?
--

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[time-nuts] 3M™ Temflex™ Rubber Splicing Tape 2155

[Gregory Beat]

Home Depot carries 3M Electrical Tape Products (Rubber, Cotton Friction, Vinyl)
http://www.homedepot.com/b/Electrical-Electrical-Tools-Accessories-Electrical-Tape-Wire-Connectors/3M/N-5yc1vZbm6yZ30

3M Temflex 2155 Rubber Splicing Tape
http://solutions.3m.com/wps/portal/3M/en_US/EMDCI/Home/Products/ProductCatalog/~/3M-Temflex-Rubber-Splicing-Tape-2155?N=5433135+3294274862=rud

3M Temflex 1755 Fabric (Cotton) Friction tape (just like I started with in late 
1960s).
http://solutions.3m.com/wps/portal/3M/en_US/EMDCI/Home/Products/ProductCatalog/~/3M-Temflex-Cotton-Friction-Tape-1755?N=5431881+3294280628=rud

3M Rubber Tapes - Insulating and Splicing
http://solutions.3m.com/wps/portal/3M/en_US/EMDCI/Home/Products/ProductCatalog/~/Electrical-Commercial-Industrial-Products-Catalog/Electrical-Tape-Mastics-Special-Use/Rubber-Tapes-Insulating-and-Splicing/?N=5433135+3294857497=r3

==
w9gb

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Re: [time-nuts] Old xtal filter

[Gregory Beat]

Old James Knight product (west of me in Sandwich, IL)

Actually, the Frequency is 100 kHz (common for calibrators in analog receivers),
with a Bandwidth of 10 Hz.  
Since they used Cycles, instead of Hertz, that will help to date the item (as 
well as JK logo).

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Re: [time-nuts] Z3815A front panel status indicator

[Gregory Beat]

This Time-Nuts (archive) thread from January 2010 may be helpful.
Some of this information came from i.fluke (eBay reseller from East Asia)
https://www.febo.com/pipermail/time-nuts/2010-January/043928.html

Originally designed by HP, and made under licence by Chongho in Korea, the 
Z3815A used the famous (or infamous) HP E1938A oscillator. 
http://www.prc68.com/I/HPE1938.shtml
There were manufacturing problems with this oscillator, and later examples of 
the Agilent Z3815A like mine were reworked with an add-on board to replace the 
E1938A with a 5MHz Milliren MTI-260 OCXO. This unit was manufactured about 1998 
- 2000 and was used in cellular base stations. It operates from 20 - 50V at 
about 20W. I use it with software especially written by Con Wassilieff ZL2AFP, 
although it also operates happily with Satstat, GPSCon.
https://www.febo.com/pipermail/time-nuts/2010-June/047771.html
--M. Greenman, ZL1BPU
http://www.qsl.net/z/zl1bpu/PROJ/Myrefs.htm

The Z3815A is certainly less common - except down here in VK/ZL.  I have one, 
and can try to answer your questions. The oscillator used in the Z3815A is 
generally the HP E1938A, although mine is a more recent Symmetricom version 
with a Milliren 260 OCXO adaptation. Power supply is 20 - 60V, and the units 
were built under license by Chongho Industrial in Korea.
No official documentation is available yet for the Z3815A, so all I have was 
achieved by reverse engineering. The unit is compatible with Satstat and Z38XX. 
I have no experience of the Z3816A, although I have an HP Z3801A, a Samsung 
GCRU-D and a Trimble NTGS50AA.
 73, Murray ZL1BPU

Leap Second Museum :: Photos of Z3815A
http://www.leapsecond.com/museum/z3815a/

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Re: [time-nuts] Z3801 Update with VP-Oncore 8Ch receiver

[Gregory Beat]

Art -

Thanks.
The nice feature of the newer chipsets, such as u-Blox,  is the support for 
multiple GNSS constellations (USA GPS/NAVSTAR, Japan QNSS, Russian GLONASS, 
Chinese BeiDou/COMPASS, EU Galileo, India's IRNSS) and newer features.

Definitely an substantial expansion -- not expected 25 years ago.

greg
w9gb

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> On Feb 11, 2016, at 10:33 AM, Art Sepin <a...@synergy-gps.com> wrote:
> 
> Greg,
> 
> Progress on designing M12x clones, like Dan's board, are really impressive. 
> More models will give users a wider choice from which to choose a 
> replacement. On that note, Synergy will also be rolling out an SSR-M8F 
> Multi-GNSS timing board (uses LEA-8MF Module) that's also plug-compatible 
> with the 40 mm x 60 mm M12x footprint.
> 
> Also, contrary to rumors that have circulated, the M12M Timing receivers are 
> still very popular and shipping daily. No EOL has been announced. There are, 
> however, obvious advantages in employing u-Blox based timing devices for 
> faster TTFF and greater sensitivity for users seeking those features.
> 
> Art
> 
> 
> -Original Message-
> From: Gregory Beat [mailto:w...@icloud.com] 
> Sent: Wednesday, February 10, 2016 10:36 AM
> To: Art Sepin <a...@synergy-gps.com>
> Cc: time-nuts@febo.com
> Subject: Re: [time-nuts] Z3801 Update with VP-Oncore 8Ch receiver
> 
> Art -
> 
> Good to hear about a uBlox SSR-6 based board.  
> A number of products (GPSDO, time servers, etc.) used that Motorola board set.
> 
> I was following Dan Watson's work on building a substitute late last year ... 
> a modern Oncore VP replacement / interpreter using the new u-blox chipsets.
> https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fsyncchannel.blogspot.com%2f2015%2f10%2fdenuo-gps-retrofit-board.html=01%7c01%7cart%40synergy-gps.com%7c7b3cfcb48f444be76af808d33248fc9d%7cc81f9fdec0e04d8c95779afaa0cad9ed%7c1=GjmhHYyXZ%2ba2pzYjSJWkgKYDF255V5%2fT%2b5QjxMdprPo%3d
> 
> greg
> w9gb
> 
> Sent from iPad Air
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Re: [time-nuts] Z3801 Update with VP-Oncore 8Ch receiver

[Gregory Beat]

Art -

Good to hear about a uBlox SSR-6 based board.  
A number of products (GPSDO, time servers, etc.) used that Motorola board set.

I was following Dan Watson's work on building a substitute late last year ... 
a modern Oncore VP replacement / interpreter using the new u-blox chipsets.
http://syncchannel.blogspot.com/2015/10/denuo-gps-retrofit-board.html

greg
w9gb

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Re: [time-nuts] Z3801 Update with VP-Oncore 8Ch receiver

[Gregory Beat]

TAPR sold a number of Motorola Oncore VP 8-channel GPS receivers with the TAC-2 
kit in late 1990s.  As I remember, the VP model will successfully emulate the 
earlier 6-channel model in equipment expecting the earlier model.
It works fine in the Z3801A.  There were likely Firmware versions with Z3801A 
(receiver support/commands sent), but I have not investigated.

K8CU - surplus Z3801A knowledge resource (now 10+ years old)
http://www.realhamradio.com/GPS_Frequency_Standard.htm

greg
w9gb

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[time-nuts] LAST CALL for Symmetricom 58532A antennas

[Gregory Beat]

David Zoldan contacted me this morning to inform me that their inventory of 
Symmetricom 58532A antennas is quickly disappearing.  He thanked the time-nuts 
group for their previous purchases in 2015.

IF you Contact David, at Launch3, and he said that Launch3 will sell remaining 
inventory to time-nuts members for $25 each + shipping -- while their supplies 
last.

Thank you
=
CONTACT INFO (Phone numbers for Orders) BELOW:
 
David Zoldan
Launch3Telecom.com
Launch3Services.com
P: 646.536.3699 | C: 917.374.7482 | F: 646.536.3866 | E:  da...@launch3.net
27 Daniel Rd. | Fairfield, New Jersey | 07004 
Globally connected, individually personalized.

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[time-nuts] True Time Nut Mission: NASA's Deep Space Atomic Clock (DSAC)

[Gregory Beat]

Upcoming Event: Deep Space Atomic Clock
Jan. 14, 2016, at 7 p.m. PT (10 p.m. ET, 0300 UTC)
You can watch this event via USTREAM:  http://www.ustream.tv/NASAJPL2

Speakers: 
Todd Ely, DSAC Principal Investigator, JPL
Allen H. Farrington, DSAC Project Manager, JPL
http://www.nasa.gov/mission_pages/tdm/clock/clock_overview.html#.VpWMgK9OKK0
Atomic clocks are an integral, yet almost invisible component of modern life. 
For space exploration, they have been the foundational frequency standard for 
NASA's Deep Space Network. NASA's Deep Space Atomic Clock (DSAC) Technology 
Demonstration Mission, led by the Jet Propulsion Laboratory, has been maturing 
the latest Atomic Clock technologies into a smaller package, suitable for 
installation on a variety of deep space probes to enhance navigation precision 
and gravity science across the solar system.

DSAC is scheduled for launch in mid-2016.  
Satellite being built by Surrey Satellite Technologies USA, Englewood, CO


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[time-nuts] Symmetricom 58539A pricing from Launch3

[Gregory Beat]

David at Launch3 provided the pricing for the Symmetricom 58539A, earlier this  
morning.  Please contact David at Launch3 (phone number below) for further 
information.

greg
-
We are marketing the GPS arrestors for $150 and are willing to sell to 
time-nuts list members for $50 each.
 
David Zoldan
Launch3Telecom.com
Launch3Services.com
P: 646.536.3699 | C: 917.374.7482 | F: 646.536.3866 | E:  da...@launch3.net
27 Daniel Rd. | Fairfield, New Jersey | 07004 

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[time-nuts] Symmetricom 58539A surplus at Launch3

[Gregory Beat]

David Zoldan at Launch3 contacted me late yesterday.
He has a large number of Symmetricom 58539A GPS Lightning arrestors. 
http://ftd.microsemi.com/resources/download-library/documents/datasheets/58538a-and-58539a/

These were likely from same source as the L1 antennas, a couple of months ago.
I have asked him what price he was considering for qty. 1 or larger.
http://launch3telecom.blogspot.com/2015/11/symmetricom-58539a-looking-to-sell.html

Any interest?

greg


We have (75) Symmetricom 58539A GPS L1 LIGHTNING ARRESTOR 
Do you think the time-nuts group may be interested?
 
David Zoldan
Launch3Telecom.com
Launch3Services.com
P: 646.536.3699



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Re: [time-nuts] Bad date out of HP Z3805A

[Gregory Beat]

I believe Dan Watson's Tria GPS receiver project, emulating the Motorola UT+ 
GPS receiver, will have an audience not only for GPS rollover issues -- but as 
constellation alternatives increase by 2020 (user choices).
http://syncchannel.blogspot.com/2015_10_01_archive.html

Heol Designs (France) has already proven that such a market existed for the 
older Trimble receivers from that same design period.
http://www.heoldesign.com/index.php?module=products=catalog=14

greg
w9gb

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Re: [time-nuts] Furuno GT77/GT80 manuals - Symmetricom 58834A-H01

[Gregory Beat]

Paul -

Looks like I accidentally chopped that sentence before posting.

I uploaded those Furuno files to Didier, KO4BB manual repository yesterday.
http://www.ko4bb.com/getsimple/index.php?id=manuals=02_GPS_Timing

greg
w9gb

> paul swed
> 
> Not sure what location they were uploaded to.
> Regards
> Paul


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[time-nuts] Furuno GT77/GT80 manuals - Symmetricom 58834A-H01

[Gregory Beat]

The HP/Symmetricom 58834A-H01 timing receiver/antenna used the Furuno GT-77 
(8-channel) and GT-80 (16-channel) GPS receivers in its outdoor radome.

I have uploaded the Hardware specification (English version) for both of these 
Furuno receivers (GT-77/GT-80) as well as the 58834A-H01 schematic diagram 
showing the RS-422 interconnections between the receiver and the indoor 
interface box (RS-422 conversion; RS-232 support) for a personal computer of 
other equipment.

greg
w9gb

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[time-nuts] Furuno (Japan) new 2016 GNSS catalog

[Gregory Beat]

Furuno (Japan) has updated their GNSS modules for multiple GPS/GNSS 
constellation support.

Furuno GNSS 2015/2026 Catalog
http://www.furuno.com/files/Brochure/56/upload/GNSS2015_2016_en.pdf

Of interest, their new GT-8736 module which has an identical footprint to the 
Motorola M12 Oncore receiver/module (40mm x 60mm) AND Supports the M12 Binary 
Protocol.

greg
w9gb

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[time-nuts] FTDI UT232R-200 cables

[Gregory Beat]

Inteknology & Solutions LLC is an electronics/computer recycler in Plano, TX.
Recently, they received new old stock FTDI UT232R-200 cables (in FTDI 
packaging).
These cables are listed on eBay at half-price ($14.99) of identical cables at 
Mouser ($30.00).
IF you purchase quantity from Intek, they do consider eBay "make offers". 
eBay auction number: 311445814121
===
I purchased a couple of these cables, last month, from Intek.
After loading the latest VCP driver (2.12.06, July 8, 2015) for my computer 
(Windows 10 Pro, OS), the cable provides full functionality for my TS2100 
(serial port).

This cable uses the FT232RQ USB bridge chip (popular FTDI chipset) and 
a performance UART to RS232 level converter.  FTDI provides a wide selection of 
VCP and D2XX Drivers for various OS.
http://www.ftdichip.com/Products/Cables/USBRS232.htm#UT232R-200

FTDI UT232R-200 Data Sheet
http://www.ftdichip.com/Support/Documents/DataSheets/Cables/DS_UT232R-500.pdf

greg, w9gb
--
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[time-nuts] Motorola MNT62312B1 - GPS timing antenna, Post mounting bracket.

[Gregory Beat]

Electronic Surplus - Cleveland, OH
http://www.electronicsurplus.com/motorola-inc-mnt62312b1-hardware-post-mounting-bracket

For Motorola GPS timing antenna. Right-Angle 2-5/8" wide x 2-1/2". 
Base with four 1/2" x 1/4" slots and two 2" x 3", 1/4" threaded U-Bolts 
and hardware x 4-3/8" tall, with 1-1/8" D hole. 
New, non-ferrous. Weight: 0.5 lbs.
$ 1.50 each

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Re: [time-nuts] Magellan GPS OEM 10 Channel -- Pinout & Docs

[Gregory Beat]

Mariusz -

 

I submitted your question and photograph to Magellan Technical Support, 

however being that this is a 20 year old OEM GPS Receiver - I do not expect
a miracle after multiple owners of the company since 1994.

http://users.cbk.waw.pl/~pozoga/oem10.jpg

 

It would be very helpful to know the Equipment that this GPS receiver was
removed from (automotive, marine, military??, etc.)

You sometimes can attack the research from the "other side" of the unknown
interface.

 

>From my research, at this point, this maybe the Magellan AVI-10 OEM receiver
(their third generation design). 

The Magellan AVI10 was an OEM 10-channel GPS receiver, sold by Magellan in
this time period.

 

IRONICALLY, your answer for documents may be in the Archives Center of the
Smithsonian Institution.

MiTAC Corporation submitted these historical records, of the Magellan
company, to the Smithsonian in 2010. 

 

Archives Center, National Museum of American History - Smithsonian

http://amhistory.si.edu/archives/AC1214.html

 

greg

w9gb

---

Smithsonian Institution

 

Series 3, Engineering and Product Development Materials, 1978-1998, consists
of ten subseries:

Subseries 7, Third Generation, 1986-1994, consists of technical notes for
the development of the third generation (primarily Meridian and Trailblazer
models) of Magellan GPS devices. 

Third generation models were intended for the lower end of the GPS market
and were compact hand-held (size, weight, battery life) and a retail price
that was reasonable. 

Other third generation devices included: the meridian, Trailblazer, AIV10
OEM, Skatblazer, NAV 6500 PM, Meridian/TB/SB XL, NAV 1200 Pm, NAV 1200 XL
PM, NAV DLX 10, Promark X, and the Pro Mark X-CM.

 

Series 5, User Guides and Manuals, 1989-2005 and undated, consists of
training, reference, and user guides for the consumer who purchased Magellan
products. 

The guides are primarily spiral bound and some are annotated. Multiple
copies of some years exist. The series is arranged chronologically.

===

> From: Mariusz Pożoga  >

> To: time-nuts@febo.com  

> Subject: Re: [time-nuts] Magellan GPS OEM 10 Channel -- Looking for pinout
or any documentation

> 

> Unfortunately board have 16-pin i 2 row interface.

> Here is a photo of the Magellan board:

> http://users.cbk.waw.pl/~pozoga/oem10.jpg

> 

> Mariusz

 

 

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Re: [time-nuts] Magellan GPS OEM 10 Channel -- Looking for pinout or any documentation

[Gregory Beat]

What is the I/O Pin Configuration (number/layout) on this GPS receiver?
The earlier Magellan OEM boards used an 8-pin interface (as seen in G8 manual).
Does your Magellan GPS board have these markings (silk-screened on board)??
  MAGELLAN Systems Corporation 
  GPS OEM 10 channel 
  P/N 00-81014-000 
  Date code: 1994 
Magellan did produce a 10-channel receiver, ProMark X, used in some of their 
consumer and OEM aviation/marine products in mid-1990s.
Ashtech G8 GPS OEM Board Reference Manual (circa 1998)
ftp://space.augsburg.edu/processed/MACCS/BU/boston_documentation/manuals/g8.pdf
GG12 OEM Board Reference Manual (circa 2000)
http://ashgps.com/mirror/20130710/OEM,%20Sensor%20&%20ADU/gg12/Reference%20Material/630831%20GG12%20Rev%20A.pdf
A12, B12, & AC12 Reference Manual (circa 2005-2007)
ftp://ftp.ashtech.com/OEM_Sensor_ADU/Legacy%20products/A12,%20%20B12,%20%26%20AC12/Reference%20Material/A12,%20B12%20%26%20AC12%20RM%20rev%20E.pdf
w9gb

> I have few old Magellan OEM 10 Channel GPS receiver. I want use them
> as a source of PPS on some passive radar. I'm looking for pinout or any
> manual. If anyone has any information I would be grateful.
> Best Regards
> Mariusz Pozoga.

History (Smithsonian now has records)
http://amhistory.si.edu/archives/AC1214.html
Ed Tuck of the Boundary Fund, a venture capital firm specializing in 
technologies founded the Magellan Systems Corporation in 1986 and served as its 
director from 1986 to 1993. Tuck assembled the initial team of Norm Hunt, Larry 
Weill, Val Wong, and Sab Ifune to conduct a feasibility study in early 1986 to 
pursue commercial markets for products based on global positioning system (GPS) 
technology. 
Magellan introduced the first handheld commercial GPS receiver in 1989 and was 
the first company to make GPS devices affordable to consumers. Magellan 
introduced the first handheld commercial GPS receiver in 1989 and was the first 
company to make GPS devices affordable to consumers. The company successfully 
introduced GPS products into the marine, professional, military and automotive 
and general aviation markets.
Magellan was purchased by Orbital Sciences Corporation in 1994. 
In 2001, Thales Group purchased the Magellan division of Orbital Sciences, and 
the company became known as Thales Navigation. 
In 2006, a private equity firm, Shah Capital Partners, and other investors 
purchased Thales Navigation, and the company was officially renamed Magellan 
Navigation. Magellan (also known as MiTAC Digital Corporation) is a 
wholly-owned subsidiary of MiTAC International Corporation and promotes and 
sells products and services under the Magellan brand name. 
Magellan is headquartered in Santa Clara, California.
http://www.magellangps.com



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[time-nuts] Symmetricom 58534A-H01, NOS surplus (eBay)

[Gregory Beat]

Surplus Ericsson GPS Timing Antennas (58534A), new in box, have appeared on 
eBay -- 
at a significant reduction in price (compared to used units sold from China).
Item number: 111702246202
Seller is located in Austin, TX (USA)

Symmetricom 58534A GPS Timing Antenna (circa 1998)
Integrated GPS Timing Receiver (for outdoor mounting)
Data Sheet
http://www.microsemi.com/document-portal/doc_view/133397-58534a

Symmetricom 58534A : Option 001 (circa 2000)
GPS Antenna Evaluation Kit
User's Guide
ftp://ns2.tangerine.co.ug/james/097-58534-02-iss-1.pdf

The 53534A has a 30.5cm cable (12-conductors, 6 twisted pairs, shielded)
terminated with a 12-pin round (circular) connector (Deutsch MMP 21C-2212P1).
This 12-pin circular connector is used with similar "all-in-one" 
receiver/antennas by
Motorola, Trimble, and Accutime.
The Mating Connector is: Deutsch MMP 26C-2212S1 composed of a 
molded back-shell (6810-204-2001) and 12 socket terminals (6862-201-22278).
Deutsch Connectors are now part of TE Connectivity (old Amphenol connectors),
check with your TE Connectivity electronics distributors. 

Synergy SYSTEMS (San Diego) may have those connectors available.
http://www.synergy-gps.com

PHOTOS are available of what is "inside" this 58534A GPS Timing Antenna (circa 
2008).
Includes schematic diagram for a DIY Interface box (5060-0184)
to convert the RS-422 to RS-232 and provide a 1 pps output.
http://home.catv.ne.jp/ff/y226/1/1-12/GPS/sub1-12-GPS.htm#58534A

A DIY interface box could be changed to USB (computer connection) 
with the proper substitution of a Silicon Labs or FTDI  -- UART (TTL) to USB 
bridge chip,
for the Maxim 232 device.

enjoy.

greg
w9gb

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Re: [time-nuts] another gpsdo

[Gregory Beat]

Some additional information from Don, AJ7LL post on new GPS product.

This is what Bill, AA7XT (new Force12) posted on his Blog, 3 weeks ago.

Ultra-accurate GPS-Locked Precision Frequency Reference 
http://www.force12inc.com/pages/blog.htmlultraaccurate-gpslocked-precision-frequency-reference-now-in-stock/

Many SDR radios, transverters and other precision devices in the ham shack can 
be made even more precise when locked to an external frequency reference.  We 
recently came across an ultra-accurate GPS-locked Precision Frequency Reference 
made in England by Leo Bodnar Electronics with two programmable low-jitter 
outputs at a great price. We immediately ordered a batch that just arrived at 
our Colorado warehouse.

More info on product page:  
http://www.force12inc.com/products/gps-locked-prec...

The digital PLL allows the two output frequency references to be set to almost 
any value between 450-Hz and 800-MHz (each output can be set to a different 
frequency). Measured phase noise falls to -144-dBc/Hz @ 1-MHz and then becomes 
essentially too low to measure at higher frequencies.

---

w9gb

===

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Re: [time-nuts] KS-24361 REF-0 standalone

[Gregory Beat]

Bob -

 

Thank you for reference to the Synergy SSR-6T.

I talked to Gina at Synergy early today.

 

The Synergy SSR-6T is still available, but now at the regular price of
$68.20

 

The Synergy SSR-6T GPS receiver would likely not be appropriate for usage in
the Lucent KS-24361,

since it does not completely emulate the Motorola Oncore UT+ receiver.

Synergy does sell the adapter board for fitting M12 series receivers 

to the larger PCB form factor of the Motorola 8-channel receivers (VP, GT,
UT)

 

SO, full speed ahead with Dan's uBlox work on the REF0 !

 

greg

w9gb

===

Synergy Systems SSR-6T receiver (some information from CNS Systems / Rick
Hambly, W2GPS). 

 

The Synergy SSR-6T GPS receiver has the same footprint as the
Motorola/iLotus M12 series receiver. 

The SSR-6T has a uBlox LEA-6T receiver that operates in uBox NMEA or Binary
mode. 

A version of this board has a processor that permits emulation of M12 series
messages as well as
other modes. 

 

The CNS Systems TAC32 software changes to support SSR-6T:

Added the @@Wb message to switch the SSR-6T from M12 to uBlox message mode.

Added "@@Wc" to switch to the boot loader.

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[time-nuts] SDG Electronics GPSDO - Mod/Hack/Build

[Gregory Beat]

Steve Gardner is an Electronics and Firmware Engineer in the UK.
Earlier this year (2015), Steve started a Blog with YouTube videos to share 
some of his knowledge and personal projects, which he hopes to grow both to 
engage others in the hobby and also to help complete stalled projects.

He is about 3/4-way through a DIY GPSDO Build using a surplus Symmetricom 
Time & Frequency Receiver.  He has 3 videos on YouTube walking through project 
steps (and Nick Watney style learning steps).
https://sdgelectronics.co.uk/10mhz-frequency-reference-gpsdo/

Steve also had a surplus Trimble SVeeSix receiver (earlier project thus year), 
that he eas a but stuck on what he was observing (1995 date).
Over weekend, I sent him links to scanned Trimble manual (KO4BB) and industry 
article on 1024 week rollover issues (since he appears to be unaware of that 
issue).

greg
w9gb

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Re: [time-nuts] KS-24361 REF-0 standalone

[Gregory Beat]

I went back to the Time-Nuts archives, and noted that a modern GPS receiver to 
replace the Motorola Oncore UT+ (8-channel, timing) in the HP Z3801A was 
discussed 3 years ago (Sept, 2012).
https://www.febo.com/pipermail/time-nuts/2012-September/070132.html

Bob Camp suggested something like a uBlox LEA-6T and a PIC on a drop in board 
to fit in the Z3801a.
"Let the GPS work with lots of sats and use the emulator to hide the extras 
from the 3801.  Initialize the gps from the PIC and more or less ignore the 
init commands from the 3801.  Sounds like a pretty involved project."
---
The proliferation of smaller, more capable GPS receivers, at lower price points 
-- as well as powerful processors -- turns the exercise into software for 
command translation.

g. beat
w9gb

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Re: [time-nuts] KS-24361 REF-0 standalone

[Gregory Beat]

There are a number of uBlox modules (6 to 8 series; and sizes) that are hitting 
the surplus venues, I saw some LEA-6T in the $30 to $50 price range as well as 
newer 8-series.

Since the PCB is being designed for the NEO size/footprint  I'll look at 
what is available in surplus.

g. beat

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Re: [time-nuts] New Symmetricom 58532A antennas - Launch3

[Gregory Beat]

Launch3 contacted me, this morning, and noted they received over 10 separate 
inquiries for the 59532A antenna within 3 hours after I posted on "time-nuts" 
(daily digest readers have not yet received notice).
For newbies, this is a great price (eBay sells the used antennas for $100 each),
and they are brand new.
--
The Internet has 99% of the questions posted, so far.  The answers are there, 
IF you know how to use your search engine (Google, Bing, etc.).

w9gb
===
Steve -

The Symmetricom 58532A GPS L1 Reference Antenna is an outdoor antenna.
The 58532a AUS option is a very simple kit of parts for mounting to a wall, or 
existing mast or tower leg. 
Your Answer is in the Specification Sheet I provided (and on Launch3 web site)
http://www.microsemi.com/document-portal/doc_view/133381-58532a
---
PAGE 2 : FIGURE 2 of the Specification Sheet tells you the SIZE of the Mast.
You see these Microsemi/Symmetricom mounting kits regularly sold on eBay 
(Launch3 may even have some), look at this eBay completed sale: 221735118342  ~ 
$20.00

IF you have ever installed a Diamond/Comet VHF/UHF base antenna -- 
this is the same mounting design type.
You can mount this to a wood structure, masonry wall, or existing pipe/mast 
(side of tower), as noted in Microsemi documents.

NOTE:  The antenna's "N" connector is on the bottom of the 58532A antenna.
These means that your coaxial feed must be routed inside your mounting pipe / 
mast -- 
IF you don't use the AUS kit of parts (or equivalent), then buy / acquire parts 
you need.

HARDWARE PARTS in typical AUS Mounting Kit
Turn to last page for typical AUS kit sold by Symmetricom/Microsemi
ftp://ns2.tangerine.co.ug/james/097-58534-02-iss-1.pdf

1 - Mast: 42 mm OD, 38mm ID; 355m Length; 10-60 CRS hot-dipped galvanized steel.
2 - Brackets
3 - Clamps
2 - U-Bolts
4 - Mounting Screws
4 - Hex Nuts

You can find these parts at hardware stores and TV antenna installation outlets.
===
The Pictorials, in this document, may help you visualize.
http://www.chronos.co.uk/files/pdfs/mic/58529a.pdf

w9gb
==
Original message:
--
The Symmetricom data sheet mentions the Option AUB antenna mast. 
What is that? I don't find details of it. How does you mount the 58532A antenna 
if the Option AUB mast is not available?

Steve, K8JQ

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Re: [time-nuts] KS-24361 REF-0 standalone

[Gregory Beat]

Dan -

I have been following your experimentation with the surplus Lucent KS-24361 
REF-0 module, to transform it into a standalone GPSDO.

The original usage of the classic Oncore UT+ GPS receiver for KS-24361 REF-1, 
by Symmetricom / Datum for Lucent, was deliberate.  
For usage at a cellular data/telecom site, the focus was on the timing and 
frequency discipline from the GPS satellite transmission, rather than the 
position or dead reckoning aspects -- used by smartphones, automobiles, and 
other GPS applications on the market.
===
A couple of comments.
While I can appreciate being economical (main criteria) and selecting the 
NEO-6M receiver, I believe that a u-Blox timing specific module (like LEA-6T) 
would be more desirable in this application.

In addition, the u-Blox 6-series is the trailing edge of product support 
(market demand dictates its continuance), while the 7 and 8-series are their 
current modules (largely for the cellular / mobile industry (smartphones or 
cell sites themselves)

u-Blox 6-series Timing Application Note (using the LEA-6T)
https://www.u-blox.com/sites/default/files/products/documents/Timing_AppNote_%28GPS.G6-X-11007%29.pdf

IF you successfully adopt the u-Blox module to correctly "mimic" the Oncore UT+ 
GPS receiver command suite, THEN you open up a larger audience of "time-nuts" 
and Frequency Standard users (HP Z3801A frequency standard universe) as a 
receiver alternative.
http://www.realhamradio.com/GPS_Frequency_Standard.htm

These users may desire a "newer" GPS receiver that has more channels 
(8-channel); latest generation receiver; access to the newest GPS 
constellations.
TAPR might be interested in sponsoring, as a kit/module, if a wider audience 
existed.

The Heol Designs N024 receiver (France) accomplished this replacement role for 
the Trimble ACE II/III GPS receiver used in the Symmetricom/Datum TymServe 
TS2100.  
Their solution resolved shortcomings in the mid-1990 Trimble receiver design 
and giving this Symmetricom NTP server, time IRIG-B time code generator, and 10 
MHz reference appliance a new lease on life (no longer a door stop).
http://www.heoldesign.com/index.php?module=products=catalog=14=54

w9gb

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[time-nuts] New Symmetricom 58532A antennas - Launch3

[Gregory Beat]

I received this e-mail earlier today (below) from Launch3.
Launch3 has been selling surplus/overstock cellular/telecom equipment.
They currently have a LARGE supply (~750) of surplus Symmetricom 58532A 
antennas.

Symmetricom 58532A GPS Antenna -- Datasheet
http://www.microsemi.com/document-portal/doc_view/133381-58532a

I acquired one of these antennas 2 weeks ago, they are brand new in box.
My 58532A antenna is currently connected to a Symmetricom/Datum TS2100 GPS 
w/Heol N024 receiver upgrade.

Check their web site and contact them (web page info), with number you desire, 
so they can determined shipping charges.

Greg
w9gb

From: Launch3

Hello
 
You previously purchased or inquired about the Symmetricom 58532A GPS Antennas, 
we are currently liquating all 750 of them.
They are all New in Box and the price is $25 each + Shipping

Link to the part -  https://www.launch3telecom.com/symmetricom/58532a.html
 
Launch3Telecom.com
Launch3Services.com
27 Daniel Rd.
Fairfield, New Jersey 07004 

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Re: [time-nuts] TS-2100 GPS : RD-5, Remote Time Code Display

[Gregory Beat]

I see that only one of the Symmetricom TrueTime RD-5 (model 820-500) Time Code 
Remote Display Clocks (7 segment LED, 0.56" high) remains unsold.
Hopefully some time-nuts acquired these nice remote time code displays.
** finally adjusted mine for local time (and DST) earlier this week **

In case you miss out on these FAA surplus items, the same eBay reseller has the
Datum TimeView 9520-240 Airborne Time Code Display (10 listed available).
Manual for that model is noted on eBay auction.
Main difference from other model, appears to be controls on front (readily 
accessible) and
possibly less flexible in the daylight savings time adjustment (I didn't look 
closely).

The eBay reseller is: gadgets-plus 
who is located in Lombard, IL.

Greg
w9gb


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Re: [time-nuts] TS-2100 GPS : RD-5, Remote Time Code Display

[Gregory Beat]

One correction, the RD-5 displays Day of YEAR (today is 251st day), not Day of 
Week.

greg

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[time-nuts] DIY Time-Nut Night Stand

[Gregory Beat]

For the time-nut that has everything ...

IKEA RAST Night Stand - $15
http://www.ikea.com/us/en/catalog/products/44361109/

Hacking the IKEA RAST
http://www.instructables.com/id/8U-Rack-Case-From-IKEA-RAST-Table/?ALLSTEPS

A few changes/suggestions:

1. IF you only need a 6U night stand, consider flipping it as an option -- 
especially if you desire another equipment piece on top , like the 
Masterclock TCD 26 (big night stand clock display)

AkroBins storage containers
https://akro-mils.com/Products/Types/Plastic-Storage-Containers/AkroBins

2. Raxxess Rack Rails, better choice (6U or 8U).  Sold at Guitar Center retail 
stores, Amazon, etc.
http://www.amazon.com/Raxxess-Rack-Rails-Black-Space/dp/B000K6B38C

3. If you desire casters, threaded inserts for the pine wood would be a better 
idea.

4. Power strip could be added to rear of cabinet (vertical or horizontal 
mounting),
to reduce cord clutter.

w9gb

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Re: [time-nuts] UPDATE: Heol N024 GPS for TS-2100 Failure

[Gregory Beat]

Gerhard -

No incidents with TS-2100/HEOL noted here, but I had everything powered down 
last week.
--
I did pickup up a Masterclock TCD 26 Time Display Clock (red digits) -- easy to 
read across room.  Works great, off the IRIG-B output port (BNC) of the TS-2100 
GPS.

A Canadian eBay Reseller had the larger Masterclock TCD 46 (surplus from USA 
Network Covert Affairs - TV series) for $99.  Nice green display, but too large 
for the shop!
http://www.ebay.com/itm/231637939268?_trksid=p2055119.m1438.l2649ssPageName=STRK%3AMEBIDX%3AIT

greg
w9gb

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Re: [time-nuts] A few questions about Tboltmon

[Gregory Beat]

If anyone needs some if the Arrestors for outdoor GPS antennas 
with F connectors (Trimble Bullet antenna) ... I think ai still have some 
spares
In my installation parts boxes.
Love to trade for an N version (which I ran out of), or postage and offers.

greg
w9gb

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Re: [time-nuts] Symmetricom(R) TS2100-GPS update and conversion

[Gregory Beat]

Yes, I picked up the correct OCXO, from the same eBay seller (Massachusetts) 
that earlier sold NOS MTI units.  Cross referenced the part number from earlier 
TS2100 posts here on time-nuts.
--
I have the Pace desoldering system, so that and some liquid flux should ease 
the TCXO removal and OCXO install.
I'll have to go back to earlier posts for the eng parameter changes.

Greg
Chicago

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[time-nuts] Symmetricom® TS2100-GPS update and conversion

[Gregory Beat]

The TymServe TS2100 arrived this afternoon.  So I started with the GPS receiver 
swap (update).

I removed the Trimble ACE III receiver (39818-C), but noted that this specific 
unit had a widget board (65398.69) on the SMA antenna connector and 2 wires 
(DC power) to the 3-pin header on the main board.

Was this board used to support +12 VDC powered outdoor antennas?

Installed the Heol N024-TS-V2.1 receiver (ACE III clone w/corrections) and 
connected a Trimble 28367-00 GPS antenna (small mag mount) to the receiver's 
antenna port. 

From a dead cold start, in urban canyons, I had tracking in about a minute and 
lock in about 20 minutes.  So far, so good.  Next will be the TCXO to OCXO 
conversion (MTI 240-0530-D).

greg
w9gb

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