Re: [time-nuts] Low-Cost 6+ GHz Prescaler board for HP/Agilent 53181A/53131A/53132A

2010-03-25 Thread David C. Partridge
I just looked into getting some assembly houses to price for supply and fit of just the SMD parts of my frequency divider design. The first one came in this afternoon, and was so huge I almost had a heart attack! Over GBP50 per board. Regards, David Partridge -Original Message-

Re: [time-nuts] FW: Re: Low-Cost 6+ GHz Prescaler board for

2010-03-25 Thread David C. Partridge
3.5mm Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Samuel DEMEULEMEESTER Sent: 25 March 2010 21:02 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] FW: Re: Low-Cost 6+ GHz Prescaler board for

Re: [time-nuts] Frequency Divider 2: FAO Bill Mason and John Pinkham

2010-03-23 Thread David C. Partridge
the schematic. However, the movie describing the handling of SM devices is quite informative and you have my thanks for the info. Bill Mason W5STP -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: Monday, March

[time-nuts] Pre-orders for Frequency Divider PCB are now closed.

2010-03-21 Thread David C. Partridge
Subejct says all. I will ordering the boards in the next few days. In the meantime I've replaced the 47uF tantalum on the supply decoupling with FOUR 6,800uF 10V aluminium electrolytics (Panasonic FK Series EEUFK1A682, ESR 0.019 ohms). That should keep the supply nicely decoupled for when

Re: [time-nuts] Schematic and BOM

2010-03-19 Thread David C. Partridge
Tom, I designed the original version of the board in 2008. I think the TADD2 came along a few months after I did the first batch of boards. If I remember correctly, John Ackermann expressed some interest at the time, but never followed up after I sent the design docs to him. Possibly

Re: [time-nuts] Frequency divider PCB: Current status onpre-orders, and pointers to documentation.

2010-03-18 Thread David C. Partridge
Ooops I did mean to say R4 and R7 - the 2K divider pair. Regards, David Partridge Email:david.partri...@perdrix.co.uk -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 18 March 2010 12:41 To: 'Discussion

Re: [time-nuts] Schematic and BOM

2010-03-18 Thread David C. Partridge
[mailto:mason...@wcc.net] Sent: 18 March 2010 20:21 To: time-nuts-boun...@febo.com; 'David C. Partridge' Subject: Schematic and BOM David: Neither the Schematic nor BOM would download..the Write Up, however did. Bill Mason W5STP ___ time-nuts

[time-nuts] Frequency divider PCB: Current status on pre-orders, and pointers to documentation.

2010-03-17 Thread David C. Partridge
The current situation is that I have almost enough statements of intent to get to the magic 50 which will allow a price of GBP14.50 per board plus delivery. For the avoidance of doubt, this is the price for a bare PCB, not for a kit, and definitely not for a made up board. I intend to keep the

Re: [time-nuts] Frequency divider PCB: Current status on pre-orders, and pointers to documentation.

2010-03-17 Thread David C. Partridge
Bill, Order request added. Docs you download from the website as per my post ... Apologies for cluttering the list with this reply, but I got a 550-'Blocked' replying to Bill's email address directly. Regards, David Partridge Email:david.partri...@perdrix.co.uk -Original Message-

Re: [time-nuts] Frequency divider board PCBs

2010-03-16 Thread David C. Partridge
with a local agent even if the actual fab plant is in Guangzhou. Cheers Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 14 March 2010 11:42 To: 'Discussion of precise time and frequency measurement' Subject

Re: [time-nuts] Frequency divider board PCBs

2010-03-16 Thread David C. Partridge
] On Behalf Of David C. Partridge Sent: 16 March 2010 16:12 To: david.partri...@perdrix.co.uk; 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Frequency divider board PCBs I now have statements of intent for 21 boards. This will result in a unit price of about GBP20

Re: [time-nuts] Frequency divider board PCBs

2010-03-14 Thread David C. Partridge
I now have eight statements of intent - only a few more ... Cheers David Partridge -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 13 March 2010 10:01 To: 'Discussion of precise time and frequency measurement

Re: [time-nuts] Choke Ring Pictures

2010-03-14 Thread David C. Partridge
definition of pie 3.1415926535 etc ? Ooops D. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

[time-nuts] Frequency divider board PCBs

2010-03-13 Thread David C. Partridge
I'm considering getting another batch of PCBs made up for the frequency divider design I sold a number of the other year. The basic target is low jitter, 10MHz sine in, square wave outputs at 10MHz, 5MHz, 1MHz, and one other output that is switchable from 100kHz down to 1Hz. These are four layer

[time-nuts] Change of email address

2010-03-13 Thread David C. Partridge
I'm in the middle of switching email addresses. Old email: david.partri...@dsl.pipex.com New email: david.partri...@perdrix.co.uk Mail to either address will get through, but the new email address is preferred. I'm still sending as the old email address for now, but will change over soon. My

Re: [time-nuts] Thermal time constant

2010-03-11 Thread David C. Partridge
Most building insulation foam sold here in UK has an Alu foil cladding on both sides ... Dave ___ 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

Re: [time-nuts] nubie querie

2010-03-05 Thread David C. Partridge
You've not seen me on a bad day - I've been known to flip quite often! :-) Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David Forbes Sent: 05 March 2010 16:20 To: Discussion of precise time and frequency measurement; Tom Van

Re: [time-nuts] Achieving maximum performance when driving 5370A/B inputs

2010-03-01 Thread David C. Partridge
But YOU don't want to pay for those (OK if someone else is paying) - they are painfully expensive. D. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bruce Griffiths Sent: 28 February 2010 03:00 To: Discussion of precise time and

Re: [time-nuts] Achieving maximum performance when driving 5370A/Binputs

2010-03-01 Thread David C. Partridge
into large scale production you can't afford them. Bob On Mar 1, 2010, at 7:44 AM, David C. Partridge wrote: But YOU don't want to pay for those (OK if someone else is paying) - they are painfully expensive. D. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts

[time-nuts] Semi OT: Martek Mira station reference GPS

2010-02-25 Thread David C. Partridge
Anyone know where I can find any info on the Martek GPS systems - I *think* they are a similar to Ashtec but that's all I know. Regards, David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Rb Oscillator - rather fundamental question

2010-02-23 Thread David C. Partridge
Cough - the rubidium clock or oscillator does have an intrinsic frequency, which is the rubidium hyperfine transition of 6 834 682 610.904 324 Hz, it's just that the frequency generated by the transition in question isn't used to DEFINE the second, so by definition, it must be secondary. Only a

Re: [time-nuts] Rb Oscillator - rather fundamental question

2010-02-23 Thread David C. Partridge
Sorry - I should have written a longer response - but you've put it all straight anyway. I wonder how long it will be before the definition of the second is changed to use the newer types of clocks using strontium, ytterbium, mercury, or aluminium (which I believe is the current front runner)?

Re: [time-nuts] Primary Standards...

2010-02-23 Thread David C. Partridge
The experimental clocks based on lonely ions and quantum embraces are very likely primary, once somebody has measured their intrinsic frequency relative to Cs once. No they cannot be - yet. At the point where (e.g.) the second is re-defined in terms of the aluminium quantum clock, then the

Re: [time-nuts] Primary standard again

2010-02-23 Thread David C. Partridge
Yes, but that is a function of whether you are in a more or less accelerated frame of reference. The standard second is defined for the gravitational conditions at mean sea level IIRC. Moving to a location further from the centre of the earth does indeed make the the clocks run faster, see e.g.:

Re: [time-nuts] Advice on 10 MHz isolation/distribution

2010-02-19 Thread David C. Partridge
In the Frequency Divider design I did back in 2008, I used 4 outputs from a 74AC541 in parallel for each output frequency, with a 180 ohm resistor in series with each output. Unused inputs were of course tied to ground. Output impedance of each driver in the '541 should be around 20-25 ohms, so

Re: [time-nuts] Fw: Re: Fluke1 Monitor

2010-02-18 Thread David C. Partridge
There is also the small point the the vendor uses the eBay handle fluke.l (lower case L) and not fluke1 (number one). Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Didier Juges Sent: 17 February 2010 19:55 To: Time-Nuts

Re: [time-nuts] No 1 PPS output on a Tbolt

2010-02-07 Thread David C. Partridge
IIRC the pulse on the 1pps output of the TBolt is very narrow, so it is pretty easy to miss. You may need to use a pulse stretcher to see it. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of SAL CORNACCHIA Sent: 07 February 2010

Re: [time-nuts] [OT] Ikea Lamp

2010-01-30 Thread David C. Partridge
For those who don't speak swedish try: http://www.ikea.com/ms/en_GB/customer_service/how_to_e-shop/how_to_e-shop.h tml Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of b...@lysator.liu.se Sent: 30 January 2010 16:01 To:

Re: [time-nuts] DMTD Question

2010-01-25 Thread David C. Partridge
FWIW 100 boards will likely cost not a great deal more (say $5-20 depending on board size than ten. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: 25 January 2010 12:01 To: time-nuts@febo.com Subject:

Re: [time-nuts] DMTD Question

2010-01-25 Thread David C. Partridge
Translation: FWIW == For What It's Worth So, one hundred boards will probably cost only a little more than ten boards. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: 25 January 2010 13:27 To:

Re: [time-nuts] LPRO Pressure Sensitivity

2010-01-21 Thread David C. Partridge
freshly emptied Riesling bottles Are just a clear indication of your very good taste in wine, nothing whatever to do with ppb/ppt. Though my old fashioned English view is that ppb is 1 in 10E12, and ppt is 1 in 10E18. The simple 1000 million (US billion) generally wasn't graced with a name over

Re: [time-nuts] Lady Heather, heavy load for PC?

2010-01-19 Thread David C. Partridge
We discussed this here not long back. The legacy of LH is that it was written as a DOS program which has been ported to Windows, and therefore runs in a loop looking for work to do with an occasional Sleep(0) call. It isn't particularly related to the graphics or mathematics processing which

Re: [time-nuts] HP 10544A with dodgy output?

2010-01-15 Thread David C. Partridge
What impedance loading is the output specified for? 1M or 50R. Could I suggest using a distribution amp? Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Nick Foster Sent: 15 January 2010 19:53 To: time-nuts@febo.com Subject:

Re: [time-nuts] T-Bolt Question

2010-01-14 Thread David C. Partridge
Or use the beta realase of Lady Heather to do a 48 hour accurate survey. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ken Winterling Sent: 14 January 2010 17:53 To: Discussion of precise time and frequency measurement Subject:

Re: [time-nuts] HP 5245L counter circa 1967 humor

2010-01-09 Thread David C. Partridge
Bob, Tell me about it! I have thrown away loads of early DIP ICs whose leads had almost completely rusted away. Some were spares that had been stored in the early conductive foam that turned out to be hygroscopic and disintegrated into sticky corrosive goop, but unfortunately some were

Re: [time-nuts] Newbie questions

2010-01-06 Thread David C. Partridge
Except the 1nS/ft figure is a good approximation to C (speed of light in vacuo). In RG58, you would expect to see 0.66C or about that. So 1nS for 8 of cable is a good ROT. Or put the other way round, about 1.5nS per foot. Dave -Original Message- From: time-nuts-boun...@febo.com

Re: [time-nuts] time-nuts Digest, Vol 66, Issue 6

2010-01-04 Thread David C. Partridge
The so what is that you incur a ring 3 to ring 0 transition and return each time you do that, and that's expensive. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims Sent: 03 January 2010 23:55 To: time-nuts@febo.com

Re: [time-nuts] Tektronix AM503X current probes

2010-01-04 Thread David C. Partridge
You're buying magic all the time if you are a member of this list and have a half decent collection of toys! I assume you've had pieces of kit where you accidentally released the magic smoke and they stopped working. The price of the particular piece of magic in question is high for at least two

Re: [time-nuts] Tektronix AM503X current probes

2010-01-04 Thread David C. Partridge
The Hall effect probes can fail in a number of ways: Shock: The sensor is built on to a flat piece of ferrite, which is then glued to an L shaped piece of ferrite to form the C core. You see one of the ends of the C when you open the slider. The sensor is wire bonded after the adhesive that

Re: [time-nuts] Lady Heather Overhead

2010-01-03 Thread David C. Partridge
It polls the serial port continually :-( Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Steve Rooke Sent: 03 January 2010 12:00 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lady Heather

Re: [time-nuts] Tektronix TM500 Series Help

2010-01-02 Thread David C. Partridge
Isn't the pinout of the MJE3055 (BCE) different from the SJE924 (ECB). Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Don @ True-Cal Sent: 02 January 2010 20:33 To: time-nuts@febo.com Subject: [time-nuts] Tektronix TM500 Series

Re: [time-nuts] Can a quartz crystal go off by 2% ?

2009-12-29 Thread David C. Partridge
They just switch the meter over to count night units. Strictly of course both day and night units are counted as kWh, and the supply company apply different charge rates to the night units. Effectively there are two meters in the same case that are switched over by the time clock output signal.

Re: [time-nuts] Chooses for a desktop/server NTP external1PPSreference

2009-12-08 Thread David C. Partridge
The pricing problem comes from the low volume of business for precision time machines. Darn - I've been looking for a Tardis for ages - should I just keep on waiting? Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] OT: Wanted desperately - LS-120 disk drive

2009-12-04 Thread David C. Partridge
Internal 3.5 LS-120 Superdisk floppy drive (ideally with black front, but ...). I'm after one in the standard 3.5 floppy drive size, not laptop. The one in my main system just died :-(. I have a lot of stuff on LS-120 disks, and while I can read them on a system in another room and network the

Re: [time-nuts] OT: Wanted desperately - LS-120 disk drive

2009-12-04 Thread David C. Partridge
Yep - that's OK for the future, reminds me that one day I must build/buy/scrounge a middle aged Pentium and fit it with 5 1/4, 3.5, 3 floppy, MO and other kit to read OLD stuff. Plus adapters for laptop IDE drives before they vanish. Right now tho' ... D. -Original Message- From:

Re: [time-nuts] OT: Power level reference

2009-12-02 Thread David C. Partridge
In fact, on the Tek 7704 or 7704A (I forget which) there were No Cost options of maximally flat frequency response OR best pulse response. OR! I think you may find the option was best pulse response OR an increased 3dB frequency of 275 MHz. The difference is just an matter of adjusting the

Re: [time-nuts] Solatrtron 7151 DMM

2009-11-28 Thread David C. Partridge
The smell does depart over time - you should have use more isopropyl alcohol and been more patient :-) A pity to loose one of those they are pretty rare. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] OT: Pace TJ-70 Thermojet problems and a solution

2009-11-20 Thread David C. Partridge
This is for information in case anyone else hits this problem. I bought a Pace TJ-70 Mini-Thermojet second hand not long ago, and even though it appeared hardly used (if at all) from the colour of the heater, it wouldn't melt solder or burn tissue paper as decribed in the manual even though it

Re: [time-nuts] Rubidium standard

2009-11-18 Thread David C. Partridge
The failure rate of a human is not constant over the lifetime and just taking a figure at the age of 25 will get you nowhere. Steve, I think you'll find that's a total red herring. That's because if you measure failure rates of almost anything, you will find that the failure rate varies over

Re: [time-nuts] Rubidium standard

2009-11-18 Thread David C. Partridge
If it weren't so horribly true I would be ROTFLMAO! Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Alan Melia Sent: 18 November 2009 14:27 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Rubidium

[time-nuts] Enertec Schlumberger 2746 microwave counter

2009-10-31 Thread David C. Partridge
Does anyone know anything about these? My attempts at googling it failed miserably. Thanks Dave ___ 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

[time-nuts] Solartron 7150+ filters

2009-10-29 Thread David C. Partridge
Ian, If you have time/inclination, I'd be interested to see pics of your dissassembly/reassembly process. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gonzo moto Sent: 28 October 2009 18:11 To: time-nuts Subject: Re:

[time-nuts] Ball PTB-100 in Tektronix TM506

2009-10-25 Thread David C. Partridge
ISTR this is a Rubidium source ... eBay item 320438444896 No connection with vendor. Dave ___ 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

Re: [time-nuts] CF-28 Laptop GPS Driver?

2009-10-24 Thread David C. Partridge
I think SiSoft Sandra will tell you the device id (assuming its PCI or more recent), and then you should be able to search for the device ID to find the drivers. I assume you've already tried the Panasonic Web Site for drivers? Dave -Original Message- From: time-nuts-boun...@febo.com

Re: [time-nuts] GPS time, UTC and TAI

2009-10-22 Thread David C. Partridge
If you need time/date calculation code, search the net for Lilian Date Most implementations allow for fractional manipulation of dates/times. So for example you can take a date time stamp convert to Lilian, add 4 hours 23 minutes and 9 seconds and convert back. Either that or convert to epoch

Re: [time-nuts] Lady Heather wants to know: How big is your tube?

2009-10-15 Thread David C. Partridge
Mark, just ask the system how big the screen is using GetWindowRect(): #include wtypes.h #include iostream using namespace std; // Get the horizontal and vertical screen sizes in pixel void GetDesktopResolution(int horizontal, int vertical) { RECT desktop; // Get a handle to the desktop

Re: [time-nuts] Lady Heather wants to know: How big is your tube?

2009-10-15 Thread David C. Partridge
I already posted the simple code to do this assuming a single monitor where the desktop resolution is the same as the monitor. For multi-monitor setups, you are probably best to find out which monitor the heather window is in (use MonitorFromWindow Api to get the handle of the monitor the Heather

Re: [time-nuts] Lady Heather display configuration

2009-10-15 Thread David C. Partridge
OK 1920 x 1200 Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims Sent: 15 October 2009 14:43 To: time-nuts@febo.com Subject: [time-nuts] Lady Heather display configuration Yes,  Lady Heather can determine the size of

Re: [time-nuts] Getting GPIB to work on HP5382B Universal counter

2009-10-14 Thread David C. Partridge
Dave, I don't remember being your college tutor on this - in fact I never was a college teacher, but what you've laid out below is pretty much what I taught all the trainee programmers I had.You've done a very good job of putting it in a nutshell. The objective of the whole is to achieve

Re: [time-nuts] [OT] Software code: Was RE: Getting GPIB to work onHP5382B Universal counter

2009-10-14 Thread David C. Partridge
You want to try to work on code that started life as Borland C (from the DOS world) and is now C++ ... Actually, given my druthers, I think I really would prefer not to have to do that. It sounds like an exquisite form of torture, especially if it's not really C++ but is instead C with objects

Re: [time-nuts] unités conventions internationa les

2009-10-13 Thread David C. Partridge
Magician, sorcerer, wizard, warlock, enchanter or similar. David -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of AL1 Sent: 13 October 2009 17:01 To: j...@quik.com; Discussion of precise time and frequency measurement Subject: Re:

Re: [time-nuts] time-nuts Digest, Vol 63, Issue 52

2009-10-12 Thread David C. Partridge
If you change the scale factor on the oscillator graph to about 100ppt, the pps to 10nS and the DAC to 50uv it isn't so scary :-) My oscillator trace is varying about =/- one fifth of a division in the short term. My time constant is set at 400 seconds which seems to have considerably reduced

Re: [time-nuts] time-nuts Digest, Vol 63, Issue 52

2009-10-12 Thread David C. Partridge
] On Behalf Of David C. Partridge Sent: 12 October 2009 10:02 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] time-nuts Digest, Vol 63, Issue 52 If you change the scale factor on the oscillator graph to about 100ppt, the pps to 10nS and the DAC to 50uv it isn't so

Re: [time-nuts] OT: Tektronix SG504 levelling head kits

2009-10-12 Thread David C. Partridge
in mind that this is about 1/2 day's work, so I ain't about to do it for free! Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 11 October 2009 09:52 To: hp_agilent_equipm...@yahoogroups.com; 'Discussion

Re: [time-nuts] Replacing the innards of my head...

2009-10-12 Thread David C. Partridge
:-) :-) Yep - I didn't see the alternate interpretation when I posted it - I could do with a head refurbishment myself too, and you've got a few years on me! Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Burt I. Weiner Sent: 13

[time-nuts] OT: Tektronix SG504 levelling head kits

2009-10-10 Thread David C. Partridge
Just a short reminder that these are still available to members of these two lists at GBP50 per kit. If you live in the UK it would be GBP45. Regular sales via eBay would be USD90 plus postage. Cheers David Partridge ___ time-nuts mailing list --

Re: [time-nuts] OT: Tektronix SG504 levelling head kits

2009-10-10 Thread David C. Partridge
Of Magnus Danielson Sent: 10 October 2009 15:42 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: Tektronix SG504 levelling head kits David C. Partridge wrote: Just a short reminder that these are still available to members of these two lists at GBP50 per kit

Re: [time-nuts] Tbolt instability

2009-10-08 Thread David C. Partridge
How large a self survey did you take with the TB? The default survey size is relatively small. If you increase the size of the self survey to be (say) 24 hours of data (24*60*60 = 86400) you may find you get a much better self survey position which should result in better stability (based on

Re: [time-nuts] Cautionary tale #4711

2009-10-06 Thread David C. Partridge
Question: How many chromosomes does a white rat have? A crucial question if the answer to life, the universe and everything is 42 and you happen to be a pan-dimensional being masquerading as a white laboratory rat ... Yes I know the book specifies white mice (chromosome count of 40 not 42), but

Re: [time-nuts] Can anyone spare an LPRO lamp?

2009-09-28 Thread David C. Partridge
Poul, Maybe the last one was 20% functional? :-) Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Poul-Henning Kamp Sent: 28 September 2009 21:09 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts]

Re: [time-nuts] [OT] Re: Solartron 7150plus DMM Failure

2009-09-22 Thread David C. Partridge
You are also required to submit a full MSDS document on the plastic of your choice :-) Don't laugh, I bought a can of isoprop and some citrus label remover the other day, they were delivered with a total of ten sheets of paper with MSDS information - argh! PS you can add another to the list of

Re: [time-nuts] Oscillator/OCXO Cathodeon FS59

2009-09-19 Thread David C. Partridge
ohms or diode check. Case is not connected to any pin. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 18 September 2009 19:59 To: 'Discussion of precise time and frequency measurement' Subject: [time-nuts

Re: [time-nuts] Question for David Partridge

2009-09-19 Thread David C. Partridge
I don't have the equipment to do that test, however a number of folks who did order a kit frequent this list and may have done such tests, but haven't owned up to the results. Sorry Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of

[time-nuts] Oscillator/OCXO Cathodeon FS59

2009-09-18 Thread David C. Partridge
I have in my sticky mitts a Cathodeon Oscillator Type FS59 51/01 10.0MHz. It might or might not be an OCXO. Anyone know anything about these? Five pins, the ones at the corners marked 1 through 4, the fifth one either unmarked or the stamp didn't register properly. There's a trimmer access

Re: [time-nuts] Oscillator/OCXO Cathodeon FS59

2009-09-18 Thread David C. Partridge
...@febo.com] On Behalf Of David C. Partridge Sent: 18 September 2009 19:59 To: 'Discussion of precise time and frequency measurement' Subject: [time-nuts] Oscillator/OCXO Cathodeon FS59 I have in my sticky mitts a Cathodeon Oscillator Type FS59 51/01 10.0MHz. It might or might not be an OCXO. Anyone know

Re: [time-nuts] Oscillator/OCXO Cathodeon FS59

2009-09-18 Thread David C. Partridge
Correction Gould TC314 -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 18 September 2009 20:56 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Oscillator/OCXO Cathodeon FS59

Re: [time-nuts] HP 5071A Electron Multiplier of Cesium Beam Tube

2009-09-07 Thread David C. Partridge
Oh Plugh! :-) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Poul-Henning Kamp Sent: 07 September 2009 22:44 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5071A Electron Multiplier of Cesium

Re: [time-nuts] Accurate 1 pps signals

2009-08-19 Thread David C. Partridge
Personally I suspect something like the interaction cross sectional area for a neutrino :-). Though what that is in SI terms I'm not sure - must be pretty low 'cos most of 'em just ghost straight through the earth without interacting. This probably means that this is a very small gnat with a

[time-nuts] OT: Tektronix 7000 Series Switch Mode PSU contoller IC 155-0067-02 replacement?

2009-08-16 Thread David C. Partridge
Posted here as well in the hope of widening the audience - please respond OFF list to david dot partridge at dsl dot pipex dot com. I have found over time a number of 7K 'scope PSUs that had failed because the 155-0067-02 SMPS controller chip had failed. I have just completed the initial design

[time-nuts] OT: Assistance with SMPS controller design

2009-08-10 Thread David C. Partridge
Does anyone here have SMPS controller design experience? If so please contact me off list as I would like a bit of assistance. My email address is david dot partridge at dsl dot pipex dot com Many thanks Dave ___ time-nuts mailing list --

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

2009-08-08 Thread David C. Partridge
of precise time and frequency measurement Subject: Re: [time-nuts] HP 106B quartz frequency standard...the story so far 2009/8/7 David C. Partridge david.partri...@dsl.pipex.com: I'c curious, what is so strange about the pass xistor in the PSU that you can't replace it? Getting one. So far I've found

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

2009-08-07 Thread David C. Partridge
I'c curious, what is so strange about the pass xistor in the PSU that you can't replace it? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Palfreyman Sent: 06 August 2009 23:25 To: WarrenS; Discussion of precise time and

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

2009-08-06 Thread David C. Partridge
Jim I may be talking out of the wrong end of my digestive tract, but what timescale were you using for your measurements? If you are seeing a continual drift with observations over an hour or two, I'd look to see what you have over 24 hours or more. Is it possible that the drift you are seeing

Re: [time-nuts] Method for comparing oscillators

2009-08-03 Thread David C. Partridge
I *may* have a one or two SMT 74AC112's left from my frequency divider project - I sold most of them with the boards. Postage from the UK may be non-trivial though. Let me know if that is of interest and I will go digging in my parts bin. Dave -Original Message- From:

Re: [time-nuts] Method for comparing oscillators

2009-08-03 Thread David C. Partridge
Now if only there were a UK/European equivalent of that site ... Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Keith Payea Sent: 03 August 2009 18:59 To: 'Discussion of precise time and frequency measurement' Subject: Re:

Re: [time-nuts] Thunderbolt temperature measuring

2009-07-26 Thread David C. Partridge
24 degrees C for the temperature doesn't sound right unless you only just applied power - I'd expect somewhere around 45C. Dace -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mats Engstrom Sent: 26 July 2009 19:14 To:

Re: [time-nuts] Tbolt packaging - suggestions ?

2009-07-23 Thread David C. Partridge
Mine lives in an old external SCSI box (from an HP DAT24 drive). Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: 23 July 2009 18:10 To: time-nuts@febo.com Subject: [time-nuts] Tbolt packaging - suggestions ?

Re: [time-nuts] Tbolt not talking

2009-07-22 Thread David C. Partridge
Hey Chuck, I just learnt a new word: Gonzo :-) I has a nice feel to it -- out of interest do you have the etymology? I assume of US/Mexican origin? Does it have any implied meaning other than that which I inferred: i.e. idiotic? Dave -Original Message- From: time-nuts-boun...@febo.com

Re: [time-nuts] Tbolt help

2009-07-21 Thread David C. Partridge
How long have you waited for the self survey to complete? I can take quite a time. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of asma...@fc.up.pt Sent: 21 July 2009 12:35 To: time-nuts@febo.com Subject: [time-nuts] Tbolt help

[time-nuts] OT: Wanted - Service Manual for Solartron 7150+ DMM

2009-07-18 Thread David C. Partridge
Subject says all. I have a very poor scan of the 7150 Service Manual. 7150+ is somewhat different. I have sent an email to Emerson (successors of Solartron Mobrey) in the hope that they may still have this. Manuals Plus has a photocopy at USD30. Hoping to find a complete original or a good

Re: [time-nuts] Accurate Thunderbolt position

2009-07-16 Thread David C. Partridge
Mark, Did you save the eprom segment after setting after changing the number of survey points. Mine (rev 3.0) knows it was told 1 survey points. PS Still waiting for your reply about the SG504 levelling head kits. Cheers Dave -Original Message- From: time-nuts-boun...@febo.com

Re: [time-nuts] Z38XX

2009-07-15 Thread David C. Partridge
Any plan to make it work with the thunderbolts as well? Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ulrich Bangert Sent: 15 July 2009 15:57 To: Time nuts Subject: [time-nuts] Z38XX Guys, I have just uploaded a new version

Re: [time-nuts] 1 14 tpi UNS die

2009-07-08 Thread David C. Partridge
Perfect - now to find one! D. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Robert Atkinson Sent: 07 July 2009 21:14 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 1 14 tpi UNS die Try Shakespeare

[time-nuts] Setting PPS offset in TBoltMon

2009-07-08 Thread David C. Partridge
If I use 10 mtrs (33 ft) of RG58 cable would I be right in thinking that I should set the PPS offset to -2.2e-08 (assuming progation speed of 0.66)? Thanks Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Setting PPS offset in TBoltMon

2009-07-08 Thread David C. Partridge
-nuts] Setting PPS offset in TBoltMon David C. Partridge wrote: If I use 10 mtrs (33 ft) of RG58 cable would I be right in thinking that I should set the PPS offset to -2.2e-08 (assuming progation speed of 0.66)? Thanks Dave ___ time-nuts mailing

[time-nuts] 1 14 tpi UNS die

2009-07-07 Thread David C. Partridge
Does anyone (preferably in the UK) have 1.0-14UNS-2A thread cutting die they would be prepared to lend me (preferably a die nut type as I don't have a die stock)? Thanks David Partridge ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,

Re: [time-nuts] 1 14 tpi UNS die

2009-07-07 Thread David C. Partridge
recognize the size you are asking for. What is your application? -Chuck Harris David C. Partridge wrote: Does anyone (preferably in the UK) have 1.0-14UNS-2A thread cutting die they would be prepared to lend me (preferably a die nut type as I don't have a die stock)? Thanks David Partridge

Re: [time-nuts] 1 14 tpi UNS die

2009-07-07 Thread David C. Partridge
-thread ing-kit Regards, Robert G8RPI. --- On Tue, 7/7/09, David C. Partridge david.partri...@dsl.pipex.com wrote: From: David C. Partridge david.partri...@dsl.pipex.com Subject: Re: [time-nuts] 1 14 tpi UNS die To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Date

Re: [time-nuts] 1 14 tpi UNS die

2009-07-07 Thread David C. Partridge
] 1 14 tpi UNS die I don't recognize the size you are asking for. What is your application? -Chuck Harris David C. Partridge wrote: Does anyone (preferably in the UK) have 1.0-14UNS-2A thread cutting die they would be prepared to lend me (preferably a die nut type as I don't have a die

Re: [time-nuts] 1 14 tpi UNS die

2009-07-07 Thread David C. Partridge
This is the standard Marine antenna mount I believe. Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 07 July 2009 14:47 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts

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