Re: [time-nuts] GPS Display clock

Hi Sanjeev, > On Wed, Mar 31, 2010 at 13:51, wrote: > >> > Zealand is an island between Denmark and Sweden. >> >> Was not aware of that. Lat/Lon? >> > > 55.5N 11.75E Ahaa... Zealand is the English name for Sjaelland. Well, Sjaelland _is_ Denmark. Try telling a dane 'Copenhagen is on an island be

Re: [time-nuts] GPS Display clock

On Wed, Mar 31, 2010 at 13:51, wrote: > > Zealand is an island between Denmark and Sweden. > > Was not aware of that. Lat/Lon? > 55.5N 11.75E Decimal co-ords, not DMS. > > > Zeeland is a province of the Netherlands > > Been there... > > > Bruce > > -- > > Björn > > > -- Sanjeev Gupta http

Re: [time-nuts] GPS Display clock

> Zealand is an island between Denmark and Sweden. Was not aware of that. Lat/Lon? > Zeeland is a province of the Netherlands Been there... > Bruce -- Björn ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo

Re: [time-nuts] OT Question - Surplus Places

I guess this means Eli's is gone ! Lester B Veenstra MØYCM K1YCM les...@veenstras.com m0...@veenstras.com k1...@veenstras.com   US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Subject: Re: [time-nuts] OT Question - Surplus Pl

[time-nuts] Looking for info/manuals for Absolute Time 150 and 300 GPS Receivers

I just acquired one of each of these receivers but with no manuals, instructions, or any other information whatsoever. They look to be mid-90's vintage, standard rack width, with RS-232 for control and monitoring, and a few selected standard frequency outputs. Any information on their use, service,

Re: [time-nuts] OT Question - Surplus Places

Zip in boston only somewhat in santa clara ca for parts. Little test equipment. All goes to ebay, for ebay On Tue, Mar 30, 2010 at 10:53 PM, Thomas A. Frank wrote: > Folks; > > In as much as most of us can only afford this hobby if we buy surplus, I > was wondering if you folks would care t

Re: [time-nuts] OT Question - Surplus Places

As to Boston, there is little in the Boston/Cambridge area any more. There are a couple of places in southern NH, figure an hour north by car: Electronic Planet in Candia PAR Associates in Manchester If you are in the area on the third Sunday of any month, April to October, the MIT UHFRA Flea Ma

[time-nuts] OT Question - Surplus Places

Folks; In as much as most of us can only afford this hobby if we buy surplus, I was wondering if you folks would care to share some of your favorite surplus places? My specific "need" involves a trip to Birmingham AL and Atlanta GA two weeks hence. Can anyone recommend any worthwhile pla

Re: [time-nuts] GPS Display clock

Mark Sims wrote: There are a few canned DST zones (US, Europe, Australia, New Zealand (what ever happened to Old Zealand?)). If you live in a backwater or your gooberment goobers things up, you can specify a custom dst rule. - How does it know when to make the DST switch???

[time-nuts] Lady Heather function/control mysteries....

The spacebar and ? keys are your friends...  also the comments at the start of the heather.cpp file Z key zooms,  any key unzooms. Select a graph (like "G O ESC"  for the osc graph).  The last selected graph can be slid up or down with the + and - keys.  Shrunk or expanded with the { or } ke

Re: [time-nuts] Rb clocks with a 1pps output

HP 5065A with Option 01 (Clock with 1PPS) or Option 03 (Clock with 1PPS and back up battery). Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Abhay Parekh Sent: Tuesday, March 30, 2010 12:26 PM To: time-nuts@febo.com Subject: [time-

[time-nuts] Lady Heather function/control mysteries....

Hello, Time Nutters-- Mark Sims said: > An easy solution is to use a Thunderbolt and the > beta 3.0 version of Lady Heather. It has both > analog (watch style) and digital time displays. > You can zoom those displays to a full screen. --- Mark-- How do you zoom those dis

Re: [time-nuts] HP10514B Mixers

Hi I suspect that DC balance might well be important to a phase detector. Bob On Mar 30, 2010, at 9:35 PM, Mike Feher wrote: > Bob - > > At the time I was more interested in DC balance and not noise. The op-amp in > our application provided adequate isolation. For our application at the time

[time-nuts] GPS Display clock

There are a few canned DST zones (US, Europe, Australia, New Zealand (what ever happened to Old Zealand?)).   If you live in a backwater or your gooberment goobers things up,  you can specify a custom dst rule. - How does it know when to make the DST switch???

Re: [time-nuts] HP10514B Mixers

Bob - At the time I was more interested in DC balance and not noise. The op-amp in our application provided adequate isolation. For our application at the time they worked great. Regards - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -Original Message- From:

Re: [time-nuts] Low cost 6+ GHz Prescaler

Samuel DEMEULEMEESTER wrote: Hi Rick, My goal is not to design a killer prescaler useable for all applications, but just to get the same specs than the original HP/Agilent prescaler board, and why not a bit better. The original HP board is a very basic design : 4-stage of MMIC and a good-old M

Re: [time-nuts] HP10514B Mixers

Hi The obvious question is weather you need a real good mixer to make a low noise phase detector. Sorting the diodes as you did resulted in a mixer that performed at a specific level. Better matching would have made it have more isolation as a mixer, it might have helped the conversion loss b

Re: [time-nuts] HP10514B Mixers

Appreciate that info. That means the small cubes I remember were "B"s. I bet I may still have one or two someplace downstairs. Thanks - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@

Re: [time-nuts] HP10514B Mixers

We'll the "A"s are the package with the BNC connector. The "B"s are for OEM equipment, they had 6 pins and a smaller plastic black case Turns out they have some of the lowest phase noise specs on record I can send the manual, if you like... Brian Mike Feher wrote: I do not believe

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

Rick wrote: "You can now see how complicated it gets if you fool around with a 10811." OK, so worse (or maybe best) case, back to the simple, safe, easy, fast, sure, solution. Add a simple outer oven control it. Only takes a trip to Radio Shack or the pet store. I've done it both ways and the

Re: [time-nuts] Thunderbolt temperature anomaly

Hal wrote: Does anybody know where to get the old [DS1620] chip? Reynolds Electronics: http://www.rentron.com/Products/Electronic-Components.htm $3.50 each (they have a $10 minimum order). Best regards, Charles ___ time-nuts mailing list --

[time-nuts] HP10514B Mixers

I do not believe that I am familiar with the 10514B. I probably have about 6 or so 10514As with BNC connectors (most in a metal case and a few in epoxy), and, I recall from about 40 years ago a 10514A that was a small little black cube with leads for mounting on a PC board. Naturally, I had to take

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

Bob wrote: about some possible shortcoming of the 10811 layout and design. Good points, If those high impedance points are directly on the PCB and unguarded, I would certainly consider that a major design flaw, but easily fixed with a little rework. The integrator is there, and if the cap is st

Re: [time-nuts] HP10514B Mixer Terminations

That post had the drawing of the last system (2nd generation), just to show the setup I was using for the offset generator. (LT1027 preamp). The new system, which I was testing the mixer terminations, has the LT1028. Its terminated in 150 pF, a 1 kilo-ohm series resistor and then a 0.1 uF ca

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

Hi and part of the gain is the insulation ... and the 10811 has thin insulation (compared to what people try to put on it ). -- I seem to remember going to a paper that talked about a lot of those nasty little component tempco's by ... ummm. err... Yes, I think it wa

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

The problem you described was more of an issue in the 5061. Len Cutler was extremely relieved that the 5071 didn't have to have an analog integrator. In the 10811, the biggest problem is that the capacitor is barely large enough for loop stability purposes. That prevents you from increasing the g

[time-nuts] Symmetricom New 58535A GPS antenna splitters FS

I was surprisingly overwhelmed by the interest in these splitters. Consequently it took me longer to prepare them all for shipping. Now they are all ready and will be at the post office tomorrow morning. That includes those who paid by PayPal as well as those who have yet to pay as they are sending

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

Hi It still acts as a sponge, only more slowly. Think of all the time it spends powered off over the years. The downside of the "nice warm place" is that the megaohm microfarad product drops considerably from the room temp numbers. Bob On Mar 30, 2010, at 8:08 PM, Hal Murray wrote: > >>

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

> Then if you just happen to have dust / dirt / humidity / spider webs ... > there goes your 400 Meg. Humidity in particular is nasty. It goes in easily > and it's very hard to drive out. But this particular capacitor is stored in a nice warm place. How much of the humidity troubles does that

Re: [time-nuts] HP10514B Mixer Terminations

Hi If you are just changing C1 when you go to 150 pf, the mixer is still pretty heavily loaded by R1 and C2. The mixer is only "close" to open circuit with R1 (or R1 plus a coil) at 500 ohms. Bob On Mar 30, 2010, at 7:55 PM, Brian Kirby wrote: > Here's a block/schematic of the last version I

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

Hi Here's the gotcha with the "integrator". The poor thing starts out with a closed loop gain of a bit over 4. That's *very* low by oven controller standards. The gain gets up to 40 or so by the time the gizmo labeled 2 uf gets up to 40 meg ohms. It's going to have a hard time going 10X above t

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

On Mar 30, 2010, at 5:06 PM, Magnus Danielson wrote: > Bob Camp wrote: >> Hi >> >> There are a couple of problems you will run into. >> >> The first is that if you do a very good job with the dewar flask, the "dead >> heat" (power of the oscillator, regulator etc) can indeed raise the >> temper

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

Bob said: a lot of good points except for a couple of little things? "With the large increase in gain, since it's a simple controller, you will need to re-set the control point. There's no handy integrator in there to crank the offset out for you." Does not seem to be true, at least on the sc

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

Bob Camp wrote: Hi There are a couple of problems you will run into. The first is that if you do a very good job with the dewar flask, the "dead heat" (power of the oscillator, regulator etc) can indeed raise the temperature of the OCXO beyond the oven control temperature. I.e. there needs t

Re: [time-nuts] GPS Networking splitter

I have a couple of Mini-circuits 3ZN2PD-1910-1 splitters I'm selling. It is 3 two-way splitters ganged together. 1.6-1.9GHz. -Pete On Mar 26, 2010, at 2:09 PM, John Green wrote: > They work very well. I have a LDCBS1X2 I got off eBay for $15 or so. Do have > a look there befor you pay retail. T

Re: [time-nuts] GPS Display clock

Hi Mark: How does it know when to make the DST switch??? Have Fun, Brooke Clarke http://www.PRC68.com Mark Sims wrote: An easy solution is to use a Thunderbolt and the beta 3.0 version of Lady Heather. It has both analog (watch style) and digital time displays. You can zoom those displa

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

Rick said: a bunch of good stuff Now, that is the kind of answers I'm talking about. I can have a 10811 inside a sealed Tupperware container filled with dry nitrogen and under a dual control that keeps both its temperature and pressure constant before you can think crazy idea. Rick, Care to c

Re: [time-nuts] Thunderbolt temperature anomaly

> It sounds like you have a Tbolt with the newer rev E (or greater) temp > sensor chip...  which is not totally compatible with the tbolt firmware.   > Dallas Semiconductor changed the DS1620 chip design and made it so the Tbolt > cannot do high resolution temperature readings.

[time-nuts] Thunderbolt temperature anomaly

It sounds like you have a Tbolt with the newer rev E (or greater) temp sensor chip...  which is not totally compatible with the tbolt firmware.   Dallas Semiconductor changed the DS1620 chip design and made it so the Tbolt cannot do high resolution temperature readings.

Re: [time-nuts] Thunderbolt temperature anomaly

Hello Maury, A Lady Heather screen grab would be helpful in understanding the issue. How is the power supply doing ? I once had a flakey power supply that gave me abnormal readings. Stan, W1LE Cape Cod msproul wrote: I have a Tbolt (labeled Rev. E, 5/31/05) that seems to be working pro

[time-nuts] Thunderbolt temperature anomaly

I have a Tbolt (labeled Rev. E, 5/31/05) that seems to be working properly, except for the temperature display in Lady Heather. When I start the program the display will come up typically showing the temperature as a straight line at 39.749981C and DAC voltage is -0.073xxx. The temperature and

Re: [time-nuts] Anritsu MH-4100A xtal osc

Pete, In addition to a nice box you now have a Lambda NNS15-12 12v 1.7A power supply, a Toyocom TCO-612C OCXO and a 10M 50-Ohm buffer card. The power supply takes up most of the case with the OCXO and buffer card mounted inside a small aluminum box within the cabinet to shield the OCXO and buffer f

[time-nuts] GPS Display clock

An easy solution is to use a Thunderbolt and the beta 3.0 version of Lady Heather.  It has both analog (watch style) and digital time displays.   You can zoom those displays to a full screen. You have full time zone control,  automatic daylight savings time,  or display the date in one of seve

Re: [time-nuts] Rb clocks with a 1pps output

Hi, Thanks for your advice. The Symmetricom solutions seem to run > 8K since they insist on bundling various other things... I will look at the PRS 10 and also the FE-5680A solution. Thanks again. =Abhay On Tue, Mar 30, 2010 at 11:38 AM, wrote: > Hi Abhay, > > A PRS10 from Stanford Research wou

Re: [time-nuts] Low cost 6+ GHz Prescaler

Hi Rick, My goal is not to design a killer prescaler useable for all applications, but just to get the same specs than the original HP/Agilent prescaler board, and why not a bit better. The original HP board is a very basic design : 4-stage of MMIC and a good-old MB510 prescaler. Nothing more. Wit

Re: [time-nuts] Rb clocks with a 1pps output

Hi Abhay, A PRS10 from Stanford Research would fit your budget easily. But would not shelf products from Symmetricom, Spectratime and others also keep below $4k? For a really cheap solution try a "FE-5680A" search on ebay. -- Björn > Hello, > I'm somewhat a newbie at this so please excuse th

Re: [time-nuts] Low cost 6+ GHz Prescaler

It has been interesting reading about the prescaler project. I designed the prescaler for the HP 5334B, and am familiar with the prescaler for the HP 5386. You really want a static flip flop like the 5386 used. The commonly available prescalers are "dynamic". They are designed to be driven by a

Re: [time-nuts] Rb clocks with a 1pps output

Hi Abhay: Check eBay for the PRS10. http://www.prc68.com/I/PRS10.shtml Have Fun, Brooke Clarke http://www.PRC68.com Abhay Parekh wrote: Hello, I'm somewhat a newbie at this so please excuse the simple question I am looking for a Rb clock with a 1pps output. If it were GPS disciplined tha

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

It has been interesting reading all the 10811 ideas. I haven't had time to respond to them individually. I would recommend reading my oven paper: http://www.karlquist.com/oven.pdf which will put some of the oven ideas in perspective. With tweaking, we could get the thermal gain of the E1938A over

Re: [time-nuts] Low cost 6+ GHz Prescaler

Back again with a last question for all time-nuts who deal with many differents counters. The prescaler board will include two jumpers in order to set the divider ratio when used as a "generic" prescaler. /128 is the ratio needed by the 53131A/53132A/53181A counter and will be set by default. /1000

[time-nuts] Rb clocks with a 1pps output

Hello, I'm somewhat a newbie at this so please excuse the simple question I am looking for a Rb clock with a 1pps output. If it were GPS disciplined that would be great, but it's not essential. Does anyone know of a relatively inexpensive solution (i.e. < 4K)? I would be really grateful for any

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

Date: Wed, 31 Mar 2010 01:12:25 +1300 From: Steve Rooke Subject: Re: [time-nuts] Making a HP 10811 better To: Discussion of precise time and frequency measurement Message-ID: <1231b6a81003300512k6017afa5lbef5ad3da96e6...@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Has anyone tr

Re: [time-nuts] GPS Display clock

Hi! I don't have one for sale, but i could help you building one. There should be a lot of projects on the net too... Original-Nachricht > Datum: Tue, 30 Mar 2010 08:12:30 -0700 (PDT) > Von: Dave Lance > An: time-nuts@febo.com > Betreff: [time-nuts] GPS Display clock > I would

Re: [time-nuts] GPS Display clock

If you can GPS-sync your network with NTP, you can run an Inova OnTime clock with it. They can be had for as low as $250 or so. On Tue, Mar 30, 2010 at 8:12 AM, Dave Lance wrote: > I would like to buy a reasonably priced GPS synced > display clock. It would need an external antenna. All of the

Re: [time-nuts] Anritsu MH-4100A xtal osc (Pete Lancashire)

Hi You would *hope* that they used a narrow PLL to lock to the external reference on the signal generator. That would make the decision easy. They can't / don't always take them down far enough though. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo

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

Hi There are a couple of problems you will run into. The first is that if you do a very good job with the dewar flask, the "dead heat" (power of the oscillator, regulator etc) can indeed raise the temperature of the OCXO beyond the oven control temperature. The second is that the gain of the con

[time-nuts] GPS Display clock

I would like to buy a reasonably priced GPS synced display clock. It would need an external antenna. All of the one I have found are for commercial use and well over $500 in cost. I have a number of different "atomic synced" WWV clocks but they are unreliable for me in northern Ohio. _

Re: [time-nuts] Anritsu MH-4100A xtal osc

Dave Baxter scribed: ... > Amazing what you find when you google ... specially when you put the model in as 4100 not 4000 ! Thanks for what you found. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.feb

[time-nuts] Bill Mason

Message for Bill Mason. Apologies yet again for using list bandwidth on this. I have now tried all your email addresses on several oaccasions. I have sent your ISP technical support the following through their web support page: Your mail servers are rejecting all mail I try to send Bill Mason

Re: [time-nuts] Anritsu MH-4100A xtal osc (Pete Lancashire)

Dave Baxter wrote: This might interest you http://www.members.shaw.ca/swstuff/gpsreference.html These people can cal' it, they say. http://www.raelectrical.com/services/anritsu-2.htm There are several other hits, including other people who stock used items. Amazing what you find when you g

Re: [time-nuts] What time is it anyway?

Magnus, Excellent links, as always, many thanks. Much to digest. Clock comparison looks an interesting area. Steve On 30 March 2010 13:12, Magnus Danielson wrote: > Steve Rooke wrote: >> >> So there are 250 clocks, presumably, spread around the World and owned >> by the member countries of the

Re: [time-nuts] What time is it anyway?

On 30 March 2010 07:46, Tom Van Baak wrote: > Below is a nice description of how UTC is generated including > a chart showing how individual timing laboratories, BIPM and > IERS are connected: > > Thanks

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

Has anyone tried putting one of these in a thermos flask? I have seen wide necked flasks available for food storage which should allow the device to be inserted and it could be wedged in place with something like foam blocks inside. I appreciate that this does not let the item loose heat but it sho

Re: [time-nuts] Anritsu MH-4100A xtal osc (Pete Lancashire)

This might interest you http://www.members.shaw.ca/swstuff/gpsreference.html These people can cal' it, they say. http://www.raelectrical.com/services/anritsu-2.htm There are several other hits, including other people who stock used items. Amazing what you find when you google My guess i

Re: [time-nuts] HP10514B Mixer Terminations

Wavetek/Rockland 5120A Synthesizer. ewkeh...@aol.com wrote: Good morning Brian. What do you use as an OFF SET oscillator? Thank you Bert Kehren Miami In a message dated 3/29/2010 11:31:15 P.M. Eastern Daylight Time, kilodelta4foxm...@gmail.com writes: Your correct

Re: [time-nuts] HP10514B Mixer Terminations

Good morning Brian. What do you use as an OFF SET oscillator? Thank you Bert Kehren Miami In a message dated 3/29/2010 11:31:15 P.M. Eastern Daylight Time, kilodelta4foxm...@gmail.com writes: Your correct - your also keeping me up past my bedtime !- I got to be 9