Re: [time-nuts] Looking for Gen Rad 1101A oscillator/parts

John Was the mercury device anything like one of these? This is an old UK origin dual xtal oven ex open wire carrier equipment. Still has one original glass xtal but one has been replaced with a more 'modern' holder style. http://homepages.ihug.co.nz/~tractorb/old%20xtal%20oven/ DaveB, NZ

[time-nuts] oscillator data wanted

Unit in question is a CTS Knights 970-4302-1 on 10 MHz. (Has an HP part no. as well, 1813- 0835-1). Any data out there? Only draws ~ 15mA from a 12 volt supply so it's not an OCXO? DaveB, NZ ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] Vintage Frequency Measurement

Also Motorola and Schomandl had similar instruments-I have one of the latter here I'm still trying to get a replacement meter for. The Gertsch and Motorola instruments were very similar to look at but not identical. The Schomandl was distinctly different with its tall vertical design. DaveB,

Re: [time-nuts] new year crashes

It's not the fibre-it's the equipment on the end of it-specifically the multiplex equipment. And with path switching where differing eqpt was used on different links. you can guess the result! Different technologies these days but the terminal eqpts, (where your packets are

Re: [time-nuts] new year crashes

The 'landline' networks also have significant (and variable) latency. ISTR measuring a maximum of around 400/500 mSec some years ago on a WN-CH digital link. Minimum over the test period of a week was nearer 250 mSec a few days later. DaveB ChCh, NZ -Original Message- From: time-nuts

Re: [time-nuts] Using GPSDO as a Refrence for Protable Amateur Radio Microwave Operations

It has been done. One I recall is Louis Cupido's Reflock system. TAPR did a kit for it some years back. Fairly sure there are others. But there are a number of readily available 'systems' these days that take a 10 MHz reference input and generate a 'clean' low microwave reference frequency

Re: [time-nuts] Trimble 65256 OCXO

er found useful. It may (or may not) have a series resistor to match up with an OEM specified trim pot. Bob On Nov 27, 2016, at 2:04 AM, Dave Brown <tract...@ihug.co.nz> wrote: This 10 MHz unit has a 5th pin that I can't find any documentation about. There have been posts in the past that h

[time-nuts] Trimble 65256 OCXO

This 10 MHz unit has a 5th pin that I can't find any documentation about. There have been posts in the past that have also indicated its use is unknown. Looking at the base, the four connections in the corners are known quantities. (ground, EFC, 10 MHz out and + supply) No. 5 is midway along

Re: [time-nuts] 1PPS to 32.768 khz

Lee Might be easier to run the GPSDO up at 16,384 kHz, like the E1 area telcos used to do (and some still do)- then divide that by 500 when your done with the PLL side of things and you have a clean stable 32.768 kHz reference to feed into the micro in place of the xtal. But first off, I'd be

Re: [time-nuts] Anybody want a Thunderbolt power supply

Getting the required Thunderbolt supply rails from a nominal 12v dc supply of doubtful cleanliness is an issue that also needs to be addressed. I'm still mulling over that one. (and using a triple output switcher from an inverter backed mains supply meantime!) The ex-telco GPSDOs all run on a

Re: [time-nuts] Optical link connects atomic clocks over 1400 km of fibre

Let's know if they get to the bottom of this, Magnus- its interesting to speculate on the cause but hopefully they figure out the real issue. DaveB, NZ - Original Message - From: "Magnus Danielson" To: "Discussion of precise time and frequency measurement"

Re: [time-nuts] Optical link connects atomic clocks over 1400 km of fibre

What is the coupling mechanism giving rise to the 50Hz disturbance? DaveB, NZ - Original Message - From: "Magnus Danielson" To: Cc: Sent: Wednesday, August 24, 2016 8:54 AM Subject: Re: [time-nuts] Optical link

Re: [time-nuts] Q/noise of Earth as an oscillator

The main issue has been deemed to be safety- or lack of it, due to the ring lasers location in an underground cavern that cannot continue to be used because of a high risk of additional ground/rock failure. For the present there has been no further ring laser work at canterbury university since

Re: [time-nuts] The home time-lab

Be aware that operating CVTs at low loading (wrpt their rated load) will usually result in a low power factor. The nature of the load will influence this as well. DaveB, NZ - Original Message - From: "Bob Stewart" To: "Brooke Clarke" ; "Discussion

[time-nuts] BPO Speaking clock articles

For those who expressed interest- http://homepages.ihug.co.nz/~tractorb/BPO%20speaking%20clocks/ DaveB, NZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the

Re: [time-nuts] Visiting Greenwich

I have a pdf of a POEEJ article on the speaking clock that came into service 24 July 1936 if anyone is interested. I suspect this predates the one under discussion? I also have a two part article on the Mark 2 built in the UK for Australia.(mid 1950s) DaveB, NZ - Original Message -

Re: [time-nuts] 1937 Time Standard

In the context of public time dissémination, the Shepherd master and gate clocks are worth noting as well- http://collections.rmg.co.uk/collections/objects/79636.html But somewhat earlier than 1937.. DaveB, NZ - Original Message - From: "Tom Van Baak" To:

Re: [time-nuts] HP 5360A History?

Here's a good example of diode programming - the answerback unit from a G E Terminet printer. The plastic cover over the diode array was removed for the photo. The 'tool' for shifting diodes is also shown. http://homepages.ihug.co.nz/~tractorb/AB%20unit%20GE%20Terminet.jpg John- you are

[time-nuts] Thunderbolt Serial Port Shutdown

Are there any circumstances when the Thunderbolt serial port is disabled by firmware? My TB runs 24/7 but stopped the night before last for no apparent reason. I only discoverd this when I checked Lady Heather early yesterday.(19 March) LH had stopped with a 'no data' warning late on the

Re: [time-nuts] Old xtal filter

Label sez B/W is actually 10cps or 10Hz, not 100. Could have been used in a carrier recovery scheme in a DSB/ISB receiver. These typically had three IF filters, one for carrier recovery and one each for USB and LSB. DaveB, NZ - Original Message - From: "Joseph Gray"

Re: [time-nuts] Calibration procedures - what is normal?

Cobham is a UK based defence and high end security supplier- originally formed (not too many years ago) by their buying out of several other companies in their lines of business. More recently they have got into aerospace activities. As you might expect, they supply some rather expensive and

Re: [time-nuts] Glass Envelope Quartz Crystals

And many of these glass envelope crystals were made on very low frequencies- I have several below 20 kHz and one as low as 3 kHz in a B7G based envelope that is 4 inches long. http://homepages.ihug.co.nz/~tractorb/3k1.JPG DaveB, NZ - Original Message - From: "Alan Melia"

Re: [time-nuts] moon bounce for synchronization

The one in the rack is a 5245L actually. You need to blow the photo up to see. First thing I looked for as I wondered if they used the higher spec timebase model but the L timebase was probably driven from a separate external source. Still have two Ms and an L here- AND still looking for a

Re: [time-nuts] Tait reference

Tait is a major mobile comms manufacturer-head office is here in Christchurch, NZ-a couple of miles down the road from me. The T801 is/was often used in simulcast systems (which seem to be peculiar to the UK) to lock up several base station equipments to a common reference-which is usually a

Re: [time-nuts] 1st Batch FE-405B sold out

Skip Whats the total power requirement to run one of these? Regards DaveB, NZ - Original Message - From: "Skip Withrow" To: "time-nuts" Sent: Saturday, December 12, 2015 8:10 AM Subject: [time-nuts] 1st Batch FE-405B sold out Dear

Re: [time-nuts] General Radio frequency standard question

Tom There's some activity here- http://groups.yahoo.com/group/GenRad/ I have a GR 1123A not fully restored yet. Performance of that 815B looks impressive! DaveB, NZ - Original Message - From: "Tom Van Baak" To: "Discussion of precise time and frequency

[time-nuts] Tbolt power connector warning

This may be old hat to some but I can't recall it being mentioned here. The power connector and short length of wiring supplied with some of the ex telco thunderbolts is a potential disaster area! Don't ask me how I know The wire colours do NOT conform to the PC standard. The +12 and -12

Re: [time-nuts] Where the 5370's are...

Was there couple of weeks back to visit Los Alamos and the VLA- among other things- sure aint like that now. Gee you guys must be old.! BTW- the Black Hole is dead- no visible stock looking in windows and all closed up. DaveB, Christchurch, NZ - Original Message - From: Mark Sims

Re: [time-nuts] FE5680 GPS Disciplined Controller

Hi Bert Will this work with all 5680s? I understood (but may be wrong) that there are several versions of the 5680. I guess if the serial commands are the same for all models then all should be well. DaveB NZ - Original Message - From: ewkeh...@aol.com To: time-nuts@febo.com

Re: [time-nuts] Jitter Definition

It depends on what your thesis is all about- you could try some of the ITU documents for 'official' definitions but these may or may not be relevant to your thesis. DaveB, NZ - Original Message - From: HagaaarTheHorrible hagaaar587pl...@googlemail.com To: time-nuts@febo.com Sent:

Re: [time-nuts] new GPSDO kit

Sounds like an ideal reference for a microwave hilltopping event. DaveB, NZ (ZL3FJ) - Original Message - From: saidj...@aol.com To: time-nuts@febo.com Sent: Sunday, April 06, 2014 6:19 AM Subject: Re: [time-nuts] new GPSDO kit Hello Brooke, Can you say more about what this means?

Re: [time-nuts] GPS W/10KHz

Re Bob's comments- This article is relevant. http://www.g4jnt.com/10MHz_Reference_Source_Stability.pdf DaveB, NZ - Original Message - From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, February 09, 2014 5:22 AM

Re: [time-nuts] Morion MV89A position

Charles It's not practicable for many people but - what about replacing your aluminium box with a, say 2 foot piece of 6 inch pvc pipe (ocxo suspended inside it clear of the wall and sealed off ends) and burying that a few feet in the ground? I expect the thermal mass of the pvc is not as

Re: [time-nuts] Motorola GPS antenna type GCNT20A3A

They do ship internationally but to a limited number of countries. For some reason the UK is not on the list of those they will ship to. See their website under the 'shipping' tab. DaveB, NZ - Original Message - From: Robert Atkinson robert8...@yahoo.co.uk To: Discussion of precise

Re: [time-nuts] 5MHz x 10MHz

Even HP used 5MHz when it counted (no pun intended!) - the 5245L used a 1MHz timebase while the higher spec timebase in the 5245M used 5MHz. DaveB, NZ - Original Message - From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent:

Re: [time-nuts] hammond 77589

Somewhat of an understatement! g Hammond has been in the magnetics business for many years and is a well known manufacturer of transformers and inductors. Details of surrounding circuitry of the oven controller would help. DaveB, NZ - Original Message - From: Flemming Larsen

Re: [time-nuts] 1970's flashback

as part of Canterbury University Physics Department. Dave Brown Christchurch, NZ - Original Message - From: Joseph Gray jg...@zianet.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, January 13, 2013 10:10 PM Subject: [time-nuts] 1970's

Re: [time-nuts] What size graphs do people like? (How big isyourscreen?)

'+' and '-' work OK in Opera under XP. DaveB, NZ - Original Message - From: Poul-Henning Kamp p...@phk.freebsd.dk To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, August 06, 2012 9:37 PM Subject: Re: [time-nuts] What size graphs do people like?

Re: [time-nuts] Different or defective FE-5680A?

They probably only wanted the 1 PPS. the DDS generates the 8.3 MHz and feeds a fixed divider to generate the PPS. Hence Eds's comments re these units a few posts back. I have a 5650 here that was similar. DaveB, NZ - Original Message - From: Chris Albertson

Re: [time-nuts] broadband MPX signal stereo

EMU 0202 or 2020? I know what an 0202 is but what is a 2020? DaveB,NZ - Original Message - From: Demian Martin demian...@yahoo.com To: time-nuts@febo.com Sent: Friday, March 16, 2012 6:53 PM Subject: Re: [time-nuts] broadband MPX signal stereo I have tested a number of soundcards

Re: [time-nuts] Three Phase Power

Many of them include the ability to remotely turn off supply- something thats not so well known as its not had much use as yet... DaveB, NZ - Original Message - From: J. Forster j...@quik.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday,

Re: [time-nuts] Lyttleton Time Ball completly collapsed

'Before' and 'after' yesterdays quake - pix of the timeball station plus an item about it that appeared in a suburban newspaper last week. http://homepages.ihug.co.nz/~tractorb/timeball/ DaveB Christchurch, NZ - Original Message - From: Steve Rooke sar10...@gmail.com To: Discussion

Re: [time-nuts] Lowloss cable?

For a given OD the centre conductor will be SMALLER diameter for 75 ohm cable wrpt 50 ohm cable. Google for the whole minimum loss/highest power xfer capability etc issue as regards coax cable diameter and impedance. All std textbook stuff. Or used to be! DaveB, NZ - Original Message

Re: [time-nuts] Earthquake meets time ball

Damn quakes - yet again - I am faced with having to repair the pendulum on my No. 36 clock. And I had only got it running again for a couple of weeks after fixing the damage from the September quake! Not all bad I guess- at least the rack mounted gear keeps going as long as the batteries hold

Re: [time-nuts] Setting clocks 100 years ago

Another existing sample of a time ball station close to home (for me) is here in Lyttelton near Christchurch, NZ (quake city) http://www.teara.govt.nz/en/timekeeping/2/3 It too suffered some building damage in the recent seismic event but will no doubt be restored in due course. Worth a look

Re: [time-nuts] A real world project need for timing accuracy...

Michael Can you tell us the expected maximum and minimum time duration you want to measure and the measurement resolution you require? At present we are just guessing, especially re the latter. DaveB, NZ - Original Message - From: Michael Baker mp...@clanbaker.org To:

Re: [time-nuts] Function of cap to GND in isolation transformer circuit

Its to prevent 'earth loops' and avoid issues with DC and low frequency AC on the coax screen - usually its found only on tx or rx end- not both- depends on the installation which practice is followed. Telcos tend to solid ground at the send end and cap ground at the rx end. And yes- it can

Re: [time-nuts] OG3 DEKATRON

All you could ever want to know abut these and similar devices is over on neonixie-either from their archives or some of the group members.( A few of 'them' are here as well!) Some of these guys make clocks (and other things) with dekatrons etc. http://groups.yahoo.com/group/NEONIXIE-L/ DaveB,

Re: [time-nuts] Making a HP 10811 better

Bert Want to share the results? More info re the experiment would be of interest as well. DaveB, NZ - Original Message - From: ewkeh...@aol.com To: time-nuts@febo.com Sent: Tuesday, March 30, 2010 6:32 AM Subject: Re: [time-nuts] Making a HP 10811 better I would not feel comfortable

Re: [time-nuts] Analog Devices precision voltage source

Do you mean the 428B? (the 628A is a 20 Gig sig gen) Exceptionally useful instruments- use mine all the time. DaveB, NZ - Original Message - From: Michael Baker mp...@clanbaker.org To: time-nuts@febo.com Sent: Wednesday, January 13, 2010 4:03 PM Subject: [time-nuts] Analog Devices

Re: [time-nuts] Help identifying coax connector type

The 'spiffy jacks' are standard european 1.6/5.6 coax connectors- 75 ohm -They used to be widely used on 2MB/s etc test equipment and distribution frames. Still fairly common in some parts of the telecommunications world. Used to be a threaded version as well as the push-on version in your

Re: [time-nuts] Down under Time Nuts

- Original Message - From: Magnus Danielson mag...@rubidium.dyndns.org Some of you actuallly work in the field I gather. :) snip- Some of us work in it- but most of us just play there. If you play hard enough, sometimes you get paid... DaveB, NZ

Re: [time-nuts] Using cheap sound cards for measurements

Are USB data transfer delay times an issue? IIRC they can vary quite a lot, depending on processor loading etc. DaveB, NZ - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, August 22,

Re: [time-nuts] Trimble Thunderbolt setup optimization andadding a10811 OCXO

Why not leave the TBolt original OCXO in place and run the 10811 as a separate oscillator phase locked to the TBolt OCXO? Then you have full control over what loop parameters you use in the external PLL, as well as still having the TBolt loop parameters to tweak if necessary. DaveB, NZ -

Re: [time-nuts] FE-5680A thermal management

- Original Message - From: Murray Greenman murray.green...@rakon.com To: time-nuts@febo.com Sent: Tuesday, June 09, 2009 6:42 AM Subject: [time-nuts] FE-5680A thermal management Leigh, I agree with Chuck. I have both an FE-5650A and an FE-5680A. With the former I was concerned

Re: [time-nuts] GPS antenna installation problem

For all those out there who don't have your own BPO 36 master clock, here is a youtube video that shows the detail of the Hipp toggle in action. The Hipp is the key to these clocks excellent time keeping. http://www.youtube.com/watch?v=lmx5iy4qwhI Yes I know, the sound track IS horrible! But

Re: [time-nuts] repairing an HP 5248M crystal oscillator

If the oven in the M version of the 5245 and the 5248 is the same then I have some notes here re pulling it apart etc. I have a 5245M and had to replace a buffer amp transistor in the oven some years ago. The series regulator in the 'always on' power supply failed short and took it out - like

Re: [time-nuts] Wavetek 3010

There should still be a 3001 manual around the town somewhere- I sold two or three dead 'uns plus a copy of the manual about three years back to a local-likely he still has it/them stashed away. Think it was Doug, ZL2BCF over at Ch West. DaveB, CH CH, NZ - Original Message - From:

Re: [time-nuts] Fine delay generator (Tim Shoppa)

- Original Message - From: christopher hoover [EMAIL PROTECTED] To: time-nuts@febo.com Sent: Friday, November 14, 2008 1:57 PM Subject: Re: [time-nuts] Fine delay generator (Tim Shoppa) Tim Shoppa wrote: mostly they were using custom-wound nonlinear wire-wound pots and motors

Re: [time-nuts] Checking accuracy of Rubidium standards

- Original Message - From: Jeffrey Pawlan [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, November 09, 2008 7:40 AM Subject: Re: [time-nuts] Checking accuracy of Rubidium standards On Sat, 8 Nov 2008,

Re: [time-nuts] Tektronix Type 602 manual

I'm in the middle of scanning a 602 manual right now- might be next week till I get done though. Been chasing one for a while now although not enthusiastically enough to pay anyone for it as my 602 is still operating OK. Recently found a friend had one salted away complete with manual so have

Re: [time-nuts] HP1600A manual

, Jeroen Dave Brown wrote: I have a mint 1600A plus manual (s?) here somewhere, Jeroen- will try to find it/them! Sorry, no digital copy though but I should be able to scan some of it for you. DaveB, NZ - Original Message - From: Jeroen Bastemeijer [EMAIL PROTECTED] To: Discussion of precise

Re: [time-nuts] HP1600A manual

I have a mint 1600A plus manual (s?) here somewhere, Jeroen- will try to find it/them! Sorry, no digital copy though but I should be able to scan some of it for you. DaveB, NZ - Original Message - From: Jeroen Bastemeijer [EMAIL PROTECTED] To: Discussion of precise time and frequency

Re: [time-nuts] Non-impedance matched antenna cables

- Original Message - From: Bruce Griffiths [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, June 13, 2008 8:37 PM Subject: Re: [time-nuts] Non-impedance matched antenna cables Magnus Danielson wrote: Hi fellow time-nuts,

Re: [time-nuts] Thunderbolt Power Supply

Eric The Tbolt requires a -12 volt line for the RS232 interface-it so happens that somewhat less than -12 will work as most RS232 line receivers have significant margin on the required negative voltage for proper signal detection. (and the positive too-but that's another story) So using -6 or

Re: [time-nuts] Plotting csv files

Martyn, With that many data points you might like to try 'Igor' DaveB, NZ - Original Message - From: Martyn Smith [EMAIL PROTECTED] To: time-nuts@febo.com Sent: Thursday, May 08, 2008 8:53 PM Subject: [time-nuts] Plotting csv files Hi All, I have an ongoing problem and realized

Re: [time-nuts] Favorite DC power Supply?

Useful if you need to check integrity of high current crimped joints, connectors etc- the supply is bound to be a switcher, so if you can figure out how to tweak the voltage over a goodly range with existing ccty,, then it's a done deal- otherwise you may need to build an external series

[time-nuts] Gertsch FM7 Frequency meter

Anyone have the schematic(s?) for the above in their archives? DaveB, NZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Tboltmon v trimblemon - was Thunderbolt Oscillator Discipling

I posted an unanswered query about this back on 5/3/08. It seems Trimblemon is intended as a monitoring package for all of the Trimble fleet of 12 channel nav receivers-it has 12 SV parameter 'slots' on the main screen. But it has no timing specific monitoring capability, such as already exists

Re: [time-nuts] Power supply for Thunderbolt

- Original Message - From: David C. Partridge [EMAIL PROTECTED] To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Monday, April 21, 2008 8:40 PM Subject: [time-nuts] Power supply for Thunderbolt I'm in the process of buying a Thunderbolt, and will

Re: [time-nuts] Buffering the 1pps output from a Z3801A

Peter All comments so far relate only to the Z3801A. The Trimble Thunderbolt has a TTL level 1 pps 10 uSec pulse output on a BNC connector intended to be loaded with 50 ohms. AFAIK there is no ECL level pps output available from the Thunderbolt via its 9 pin serial port connector. It's

Re: [time-nuts] motorola stln4096a Remote High Stability Oscillator

From what you have found so far, it appears this assembly is intended to operate from a DC supply of 24 volts. The 9 pin connector will almost certainly be a standard serial port which means all inputs and outputs, including the 24 volt DC supply, must be via the 25 pin connector. If you can

Re: [time-nuts] WTB: 10, 20, 40 or 50MHz oscillator

- Original Message - From: Eamon Skelton [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, March 03, 2008 9:50 PM Subject: Re: [time-nuts] WTB: 10, 20, 40 or 50MHz oscillator David Hilton-Jones wrote: Does anybody (preferably

[time-nuts] HP 58516A GPS antenna distribution amp.

I was donated one of these recently that has an unuseable output port-port three. I've not checked its operation yet but wondered if anyone else has had one of these with a similar problem. From a brief look inside it's hard to see what could go wrong on 'one port only' so I'm hopeful its

Re: [time-nuts] How to measure regulator noise?

John You won't need much of a cap for DC blocking as inputs are hi-Ztoo big and the chargeup may well trigger the overrange condition. Been a while since I used a 3561A but can't the input tolerate up to 5 vdc? I may be thinking of something else. Great instruments - wish I still had access

Re: [time-nuts] WIRED Time Nuts, NPR

- Original Message - From: Tom Van Baak [EMAIL PROTECTED] To: John Ackermann N8UR [EMAIL PROTECTED]; Rick Karlquist [EMAIL PROTECTED] Cc: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, December 19, 2007 9:20 AM Subject: Re: [time-nuts] WIRED

Re: [time-nuts] Time Transfer

- Original Message - From: Tim Shoppa [EMAIL PROTECTED] To: time-nuts@febo.com Sent: Monday, December 17, 2007 8:37 AM Subject: Re: [time-nuts] Time Transfer snip-- Yes, it's interesting to look at the WWV signal wander on the HP 3586, compared to it's OCXO, and while

Re: [time-nuts] Super Regulator links

- Original Message - From: Bruce Griffiths [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, December 14, 2007 4:36 PM Subject: Re: [time-nuts] Super Regulator links John Miles wrote: What are some of your favorite low-noise

Re: [time-nuts] John Vig elected President of IEEE

- Original Message - From: John Miles [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, December 11, 2007 8:50 AM Subject: Re: [time-nuts] John Vig elected President of IEEE It's a nice read, by the way. Has very little to do

Re: [time-nuts] Scopes and 1 PPS signals?

-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Brown Sent: Tuesday, October 23, 2007 11:21 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Scopes and 1 PPS signals? I took Brookes original inquiry to be about

Re: [time-nuts] Scopes and 1 PPS signals?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY - Original Message - From: Brooke Clarke [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, October 24, 2007 11:05 AM Subject: [time-nuts] Scopes and 1 PPS

Re: [time-nuts] Scopes and 1 PPS signals?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY - Original Message - From: Didier Juges [EMAIL PROTECTED] To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Wednesday, October 24, 2007 3:58 PM Subject: Re: [time-nuts] Scopes and 1

[time-nuts] test post

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Nothing seen since last week- anything wrong? DaveB, NZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] Tboltmon query

Can any one tell me what the full Hint Box' text is for the message one gets when mousing over the logging on/off box? The text starts'When green, logging is active: when yellow,data logged that seco.. but I can't see any more text as the box is not long enough. Thanks DaveB, NZ

Re: [time-nuts] Tboltmon query

Tnx John, Richard. That clears things up. As I've left it at the default of 1 sec logging at this stage its yellow all the time! I should have attacked it with hexdump (or whatever) myself, but figured someone here would probably know. Cheers DaveB, NZ - Original Message - From:

Re: [time-nuts] Information on OVCXO

I just become the owner of a Precision Crystal EROS-750- SBR -4 voltage controlled OCXO. I believe that this is the oscillator that is used in the SRS SR620 Frequency Counter when it has the 2-ppb option-01 timebase (please correct me if wrong info). The unit has four terminals simply

Re: [time-nuts] Info on HP 10514A and 10534A mixers?

- Original Message - From: John Ackermann N8UR [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, May 28, 2007 8:32 AM Subject: [time-nuts] Info on HP 10514A and 10534A mixers? Anyone have a manual for either (or both) of these

Re: [time-nuts] 50 vs 75 ohm cables

Peter I believe most of the telco world adopted 75 ohms back in the early days of wideband analog multi channel transmission - this was before WW2 when 50 ohm transmission lines were virtually unknown. 75 ohms reigned (almost) supreme. But remember that coaxial transmission lines were not

Re: [time-nuts] retry: PRS10 has spurious frequencies

Henk Do any of the spurious signals show on the SA with a search antenna (located in your lab environment)connected instead of the PRS10? DaveB - Original Message - From: Henk ten Pierick [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com

Re: [time-nuts] How good are mechanical watches

- Original Message - From: Hal Murray [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Saturday, April 21, 2007 9:28 AM Subject: [time-nuts] How good are mechanical watches John (who still wears a mechanical watch) Speaking of

[time-nuts] Use of Tek 7D11 Digital Delay Unit.

Has any one here any experience of using the 7D11 as part of a scope display setup for time/phase comparison purposes? I've been thinking about getting one for other work, but maybe there's also a TF reason to chase one along? DaveB, NZ ___

Re: [time-nuts] Setting Osc Frequencies

- Original Message - From: Dr Bruce Griffiths [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, March 07, 2007 9:31 PM Subject: Re: [time-nuts] Setting Osc Frequencies Dr Bruce Griffiths wrote: Lars Karlsson wrote:

[time-nuts] Can anyone ID this Ashtech GPS receiver

Subject line sez all. Picked this up recently with some other GPS related stuff. Google hasn't been my friend on this-at least so far! Picture here. http://homepages.ihug.co.nz/~tractorb/ashtech.jpg I've taken the top cover off the metal box and its sitting on the scanner next to the exposed

Re: [time-nuts] Thunderbolt GPSDO

Re the dc requirements for this- I suspect the -12 is only used for the RS232 interface and 25 mA (from the datasheet) seems on the high side for that? 10 mA sounds much more likely (as per the manual). As well, the manual figure of 750mA for the +12 seems more likely than the datasheet

Re: [time-nuts] Stepping up the output of an OCXO

Not sure if the NVE Isoloop range of GMR based high speed data couplers would have any advantages in this regard-their data is a bit sketchy but they would likely have similar issues- aside from certainly being fast enough. DaveB - Original Message - From: Dr Bruce Griffiths [EMAIL

[time-nuts] Lucent Rb module

A friend has acquired a Lucent Rb reference module-described as follows- The front panel part of the buff coloured Lucent module is marked: Lucent ED2R849-31, G4 WP-92066-L5 I've not been following the current discussion on Lucent hardware that closely but do these numbers mean anything to

Re: [time-nuts] 75Z vs 50Z for GPS receivers

- Original Message - From: Arnold Tibus [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, January 30, 2007 4:09 AM Subject: Re: [time-nuts] 75Z vs 50Z for GPS receivers Hi Brooke, acc. my understanding, the characteristic

Re: [time-nuts] Nifty old GR OCXO?

Since the topic has been raised- herewith a few pix of an equally old (well, nearly!) OCXO using mercury-in-glass high and low set point thermometers for temperature control. http://homepages.ihug.co.nz/~tractorb/oven/ This came out of an early openwire carrier system-of UK origin-probably

Re: [time-nuts] Nifty old GR OCXO?

A GR system - as per the tvb web page - in operation at Makara (an MF/HF receiving/monitoring site) near Wellington NZ-this came out of service in 1955 and was replaced with the completely home-grown frequency measuring system in the second photograph.

Re: [time-nuts] old HP application notes

Ditto for 301-1 DaveB - Original Message - From: Paramithiotti, Luciano Paolo S [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, January 25, 2007 10:12 PM Subject: Re: [time-nuts] old HP application notes Yes Bruce I am

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