[time-nuts] Regulator Choices

Wrote: Consider using a LT1083 7.5 Amp regulator.    Well it is $14 each.  The LM 1084 5 Amp 1s $2.43 each   Hefty premium for an extra 2.5 Amps.   If one needs greater than 5 amps, the LM 1084 data sheet shows how to easily parallel 2 or 3.   What’s in your wallet?  G   Regards,   Perrier

[time-nuts] RDR Electronics

List, Wrote: But do they have a actual website. I did not find one or a webstore? How is it you even knew they had the items??   1.  This is what I found on  google search:   RDR Electronics Inc www.rdrelectronics.com/‎ RDR Electronics Inc. 7045 S. Fulton St. #230. Centennial, CO 80112. Voice

[time-nuts] Spectracom 8164 Hack?

List,  There are several Spectracom 8164 receiver available on Ebay. My question: on the front panel bank of frequency selection switches, the left hand switch is marked .1MHz.  Is that really a 100 KHz (for LORAN) setting or is it really tuned to WWVB? If it truly is tuned to 100KHz can it be

[time-nuts] 60 KHz receivers

List, On Ebay I stumbled upon a site called pv. electronics from England The site offers a 60 KHz SYMTRIK Radio Time Receiver Module W/100 MM Antenna for $25 delivered.  I don't know if this will work with Paul Sweed's circuits or not. It looks like the

[time-nuts] 60 KHz receiver number

List, 60 KHz SYMTRIK Radio Time Receiver..Item number: 230991713311 Regards, Perrier ___ 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] GPS receivers W/timing outputs greater than 1PPS

List, RDR electronics in Colorado has Motorola M12+ OnCore GPS Timing Receiver 3V 1pps 100Hz for $20. They also have other GPS units.  Cheaper than chicoms and guaranteed.  Stock varies so check from time to time if you don't see what you need. I'm a multiple happy camper customer. Regards,

[time-nuts] HP Neat Retrofits

List,   Check these out on ebay   5370A W/Rubidium.   Item number: 321147995106.  Slick, but I wonder about the heat issue.   HP 3325B W/Rubidium.  Item number: 300907767545. Very nicely done.  IMHO, fairly priced.   Regards,   Perrier

[time-nuts] MAS6180 chip

Paul, Where does one get the chip?  I had no luck with Mouser or Digikey. Also on the data sheet they showed the chip in a 20DIP package.  Is it available.  It will be dead bug circuitry. Regards, Perrier ___

[time-nuts] Have 10 MHz need 19.2 MHz

List,   My reply to Javier Herrerojherr...@hvsistemas.es   P  Double the 10 MHz to 20 MHz.   P  With another circuit of 74HC390’s divide 10 MHz to 200 KHz.  Then double it twice to 800 KHz with LM 1496 DBM’s.  Apply the two frequencies to a LM 1496 DBM and use a LPF to get the 19.2 MHz.   P  

[time-nuts] WWVB Demodulator Ckt.

All,   I have used photoshop to clean up so it is easier to read and expanded a bit both of Paul Sweed’s D-PSK-R costas loop circuits.  I changed the schematic to a bit image and it is a TIFF file so one can take it to FedEx office or similar if one wants a large copy.   I will send a copy to

[time-nuts] Carrier meter

List,   Wrote:  I have noticed that my Carrier meter doesn't consistently go to Zero. The Meter itself seems fine.   Your questions are answered in the Y2KR3 manual.  See Chapter 11.    While all on the list are willing to help, much angst and lost time can be avoided by perusing chapters 9 and

[time-nuts] VE2ZAZ controller

List,   The VE2ZAZ is a very clever design, but its design limits its usefulness to many of us.   First, one has to be able to program a microprocessor.  This is a non-starter for many of us.   Secondly you have to have a different program depending on which 3586 one has or sub-set thereof.  If

[time-nuts] HP and other equipment failure

All,    There has been an on and off discussion of equipment failure so I’d thought I’d add my experience.   First I’ve been repairing HP equipment since 1976 before many of you were born.   I now have over 16 pieces of HP test equipment and several units now need repair.   In my experience,

[time-nuts] Have 10 MHz need 19.2 MHz

List, Another hardware possibility.    Double the 10 MHz to 20 MHz.   With another circuit of 74HC390’s divide 10 MHz to 200 KHz.  Then double it twice to 800 KHz with LM 1496 DBM’s.  Apply the two frequencies to a LM 1496 DBM and use a LPF to get the 19.2 MHz.   Hardware complicated?  A bit. 

[time-nuts] OCXO shock protection

All,   We will be moving to southern California in the near future.   My question if for people who live in that area is do you need to do additional shock mounting for OCXO’s because of the ongoing, usually minor,  earth tremors that take place?   I will be running two of the Lucent units and

[time-nuts] Feldmann guide to the HP3586A/B/C

Gents, Wrote: There are a number of paragraphs with the same number and Appendix C is missing all the schematics. PS both the links go to the same document. Wrote: original was edited by a third party (including in particular the paragraph headers) around the time that Mr. Feldmann died. I

[time-nuts] Equipment for sale

All, We are moving to a small condo in So CA so I want to shed some equipment. I have a HP 5350 Microwave Frequency Counter for sale. It measures from 10Hz to 20 GHz. Sensitivity rated as -40 dBm. It has an acquisition time of 20-60 ms and up to 120 measurements per second. It is fair

[time-nuts] Contact needed

Tisha Hays please contact me by L-L. Regards, Perrier ___ 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] HP 3586 Problem

Esteemed Gurus, I was checking out two operational HP 3586B’s which I normally use for RF work on the lower frequencies and found out one would not sync below 300 KHz or so and the other below 200 KHz on the Fo rear output connector. So I contacted my friend Mike Fisch and asked him to do

[time-nuts] WWVB and Free Democracies Survival

America and would not be subject to problems of diurnal shift or the new modulation scheme. Baring an improved WWVB signal strength us time nuts may be forced to install 20 to 30 ft. loop antennas when the new system is finalized for an adequate signal. Regards, Perry Sandeen

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

Esteemed Time-nutters The religious answer. 1. Install antenna in as inconspicuous location as possible. 2. Go out once in a while with a white bed sheet covering your torso and head. Then (a) put a couple of cheap (even plastic) flowers near it for a day or so. Then (b) get some

[time-nuts] 40db antennas and HP 10811 oscillators

Esteemed Time-nutters, One might want to check our Fair Radio for both. Rock solid integrity and located in the USA. Regards, Perrier-Usual Disclaimers ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Holy cesium clock, Batman!-Again

wrote: Oops, there is currently 7 caesium clocks in my lab (not all mine) and I'm not there to protect them all. Lost count of rubidium... Observations: 1.  Envy, envy, envy. 2.  With the 7 cesium clocks you still don’t know which one(s) is/are exactly correct although it may be many decimal

[time-nuts] HP 3586B GPSDO

List, I saw a picture somewhere where someone added a GPSDO to the back of a HP3586 but it didn’t give any details. My question:  I have the Ovenaire model 42-16 high stability oscillator but it has only four wires to the base.  Can one apply EFC to it or does one need another oscillator?  

[time-nuts] HP 3586B Power Supply Failures

List, The other day I had my second HP 3586B power supply board smoked.  It burned both the PC board traces and the connector on the motherboard so badly it will have to be replaced.  Also an inch or so of one trace on the mother board but it looks like it will be repairable.  Fortunately I

[time-nuts] New precision watch

List, I saw an ad today for a Bulova Champlain Precisionist watch. It is supposed to be accurate to + 10 seconds a year. What stood out in the as is that they are using a 262,144 KHz crystal eight times the frequency commonly used. I don’t know if it is more accurate than the Seiko (?)

[time-nuts] Bad GPS location

Wrote: There are places, like a lot thick with 100' pine trees, that satellites are pretty much unusable. A tower is out of the question due to zoning Perhaps it’s time for the old Flagpole antenna. Unless of course one lives in California where displaying the American flag might be

[time-nuts] Small basket

List, Wrote: I wonder how long it will be before the only remaining basket of will suffer a catastrophic fall. The U.S. satellite system, AFAIK, is not guaranteed for high accuracy to civilians and also is vulnerable to foreign interference/destruction. Perhaps while we have it as it is now,

[time-nuts] HP 10811 Response I Replies

Esteemed Colleagues, I will attempt to make a coherent technical reply to the remarks made about my 10811 posting. But first a bit of qualification. My remarks refer to the 10811 and that vintage of OCXO’s. Wrote: Doing what you describe will result in a very sensitive humidity sensor,

[time-nuts] Separating two issues

GM List, The first issue was the request to stop the Light squared posting. Sent twice. We are non-paying guests with a generous host. Gentlemen, remember the Golden Rule of Business: He who pays the gold has the right to set rules. Constant violations could result in no list at all.

[time-nuts] Making a HP 10811 and similar types better in the real world Part I

GM List, Basic commandments of precision grade Crystal Oscillators. (1) It is both an art and a science. (2) The devil is in many details. Unbelievers suffer. Here is the framework of methods that really work. (Assuming a used unit) 1. Make sure your power supplies are stable AND meet the

[time-nuts] Subject: Listening to the List Owner

GM List Wrote: Did *anyone* pay any attention to the request I posted last evening??? No. They were too busy top posting each other. Considering how much top posting was done implies a nationwide shortage of Prozac (or equivalent). Regards, Perrier

[time-nuts] Rubidium stability

List, Someone asked about surplus rubidium stability. Here are my results. I had five Lucent Rubidium’s. Three were from RDR in centennial, CO and two were from the Huntsville hamfest. Before measuring stability, I ran them for a week on the bench. Using A Lucent GPS and a HP 5370B counter

[time-nuts] Remotely read power meters

List, Leaving all the conspiracy assumptions aside, there is a very practical cost savings to the user. Let me explain by this example. We lived in Custer county CO for several years. There are about 3,500 people spread out in the area. Our average electric bill was around $150 a month

[time-nuts] Capacitor Analyzer

List, Wrote It's almost $1k and does much more than measure leakage. Is there a much lower cost instrument that's aimed at just leakage? Sprague Capacitor Analyzer TEL- OHMIKE Models TO-5 or TO-6. Usually about $100 on epay. I have a TO-6. Two caveats: It is a two wire instrument with IIRC

[time-nuts] No more 60Hz! TEC Elimination

List, Gary wrote: PGE, bless their corporate hearts, is run both like a Swiss clock and third world nation power. If you have a fair amount of industry or malls nearby (i.e. customers), your power is great. Live at the edge of town, and things are not so good, even in Silicon Valley. Monte

[time-nuts] Cooling Fan Information Needed

List, About a bazillion posts ago on the list (this translates to about two months) there was a discussion about cooling of very hot instruments such as the HP 5370A/B series. One poster related how he had replaced the stock OEM fans on a HP 5370 with ones used for cooling computers and

[time-nuts] Racal-Dana 1992 Information Wanted

List, Being fatally infected with the Time-Nuts disease I’m inclined to spend ever more amounts of money in pursuit of greater minutia. Thus the question of the Racal-Dana 1992. I have at present two HP 5370B units which are spec’d to 10 nS resolution IIRC. I believe it was posted on this

[time-nuts] Symmetricon CS question

List, I’m still confused about the new Symmetricon CS unit. Is it truly a cesium primary standard or is it a secondary standard that happens to use cesium? IF it is truly a primary standard, is saving up the $1500 for one a better deal IN THE LONG RUN than getting a used HP or other brand

[time-nuts] locating a 6 digit digital clock

Wrote: Except, of course, if I could find a nice set of nixie tubes at a reasonable price, and a set of sockets and a transformer for the high-voltage supply ... ! For the microprocessor challenged such as I, IN-14 Nixie Tube Clock Kit With Tubes Included ebay 170652988069 Even has gps or

[time-nuts] What's the best way to double 10 MHz to 20 MHz?

List, How about the LM1496 IC DBM? Simple and cheap. Regards, Perrier ___ 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] Top Posting Clarified - Hopefully

Exalted Listers, Because of the high amount of useable technical information to me I copy each month’s postings to a word file. I do this for two reasons. First is that sub-dividing posts into different subject files is just too complicated. Secondly net archived information relies on the

[time-nuts] Am I missing something?

List, Wrote: Guys, I gotta ask, what does this have to do with time keeping? Am I missing something? Most definitely. In fact, I believe several things. It is the broadening of one’s mind that then allows one to better solve a problem(s) of interest. The current label used is “out of the

[time-nuts] GPSDO and Rb Oscillators Source

List, Wrote: It helps if you give an ebay reference item number so people can see what you are talking about. Absolutely. Here it is. Lucent RFTG 15MHz w/ LPRO-101 10MHz Rubidium Oscillator Item number: 360356058702 Starting bid $79 Lucent RFTG 10/15 MHz GPSDO GPS Disciplined

[time-nuts] HP 3586 entirely referenced to 10MHz: A solution II

List, Wrote: Your simple idea is a non-workable concept. Now how do you actually know that? It’s an opinion that would have to be proved or disproved by actually doing it. I based my opinion on the graph that showed the HP crystal frequency change verses temperature which was IIRC, quite

[time-nuts] HP 3586A/B/C entirely referenced to 10MHz: A solution II

Fellow Listers, Please read and think a bit about my comments before rushing to the reply button. The comments are meant to be technical. When Burt VE2ZAZ posted his HP 3586A/B/C entirely referenced to 10MHz: A solution, I was drooling with envy to add it to my units. However, after reading

[time-nuts] GPSDO and Rb Oscillators

List FYI, RDR of Centennial CO has listed Lucent GPSDO and Rb Oscillators on epay for very reasonable prices. I’ve purchased several times from them. Lucent only uses a single 24VDC supply. As advertised, good shipping. Disclaimer: no association etc. Regards, Perrier

[time-nuts] Equipment question: OCXO versus GPSDO + XTAL

Wrote: It seems like everybody is telling me go for the cheaper, add the OCXO later on if you need it - but that's not what I'm after. What I'd really like to do is to make up my mind based on educated opinions on this list whether the built-in OXCO option offers any advantage at all compared

[time-nuts] Watches-Another perspective

List, It was a bucolic spring day and a lawyer was riding down the road in his red Ferrari and his arm resting out on the open window ledge. Suddenly a truck goes by and sideswipes the driver’s side and doesn’t stop. The lawyer crawls out of his car stands on the drivers side and says “My

[time-nuts] Measuring clock accuracy in the past

List, Just a short note of thanks for all who answered my questions both on and off list. I was overwhelmed with the graciousness and information that was shared. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To

[time-nuts] Subject: Re: Lightsquared and a little math

List, Wrote: And it certainly was not the left that condoned--or ever would condone--leaving the stadium lights on while turning off power to hospitals and nursing homes. Which didn't happen, by the way, but it makes a fantastic tale. And power * did* roll off for virtually all

[time-nuts] Lightsquared and a little math

List, Wrote The nationwide LightSquared network, consisting of approximately 40,000 cellular base stations, will cover 92 percent of the U.S. population by 2015 You can make book the missing 8 percent will be areas that exclude the farmers and ranchers who provide our food but the left will

[time-nuts] External 10811 from HP 5070B

List, Wrote: So what’s in the 5370B would just be for 'does it work or not' when not running externally. There are at least three advantages for external operation. 1. The HP turkeys didn’t make EFC available on the HP 5370B which totally baffles me. 2. There are better lower

[time-nuts] Tbolt Temp Specs

List, The temperature numbers that members have published are very impressive. My question is: What does the tbolt use for a temperature sensor and is there or has anyone been able to independently verify that the stated numbers are accurate? Of course if they are working extremely well it

[time-nuts] Mass vs BTU Function

List, Please help me with this physics question. If one has a given cube, say 2 x 2 x 2 inches. And one has the choice of aluminum, copper, or lead (just for an example). Will each store or hold the same amount of BTUs or does the density make a difference? IF the density makes a

[time-nuts] Clock Calibration

List, I was reading some of the history of mechanical clocks and was astonished to see that one guaranteed its accuracy to 2 milliseconds per day! (And it was) Now this same clock when tested with modern equipment tested to be accurate to 200 micro-seconds per day. Astonishing! This got to

[time-nuts] 10 MHz Oscillator comparison part II

List, Wrote: However the exercise is probably pointless as the frequency difference between the 2 signals as seen at the output of the cascaded divide and mix chains are reduced by this scheme. Umm. I guess I didn’t express my thoughts effectively enough. The idea is to subtract 9 MHz in

[time-nuts] Comparing 10 MHz Oscillators at 10 GHz- an alternative method?

List, While comparing oscillators at 10 GHz might work for some it is indeed a daunting challenge at the very least. I would like to propose what may be cheaper and more readily achieved method for Comparing 10 MHz Oscillators by more of us time-nuts. (This is still theoretical) What I

[time-nuts] HP 10811 performance and quality

List, Wrote: It was not cheap, it was not high performance, it was not elegant. But it did get product shipped on time. “In the land of the blind the one eyed man is king” Rick, All your statements are most likely 100 percent accurate. You are the expert. The problem for the rest of us is

[time-nuts] HP 10811 Stability

List, Wrote: I have no problems with my 10811. I just want to experiment with ways to improve performance, right now I have several that are in the E-13 YES! Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To

[time-nuts] Archiving Data

List, I apologize in advance for my long posting Several weeks ago I posted what were my attempts to save data and my school-of hard-knocks learning curve. Unfortunately several posters just had to nit-pick the process I had used and started a long series of posts and counter-posts about the

[time-nuts] Oscillator Packaging

List, Several members have mentioned that they have HP 10811 style oscillators. A very neat packaging solution with dividers and circuits is posted at: KH6GRT. Do a Google search. Regards, Perrier ___ time-nuts mailing list --

[time-nuts] Favorite Watch?

GM List, Food For Thought. Not a criticism of any list member! Citizen CTQ57-0953 Chronomaster (calibre A660) Price: $2,699.00 Nice Watch: $100 PLUS Christmas Dinner at the Homeless Mission feeding 966 @ $2.69 each Totals $2,699.00 Decisions Decisions Decisions Merry

[time-nuts] Frequency counter recommendation - Basic

List,   The opinions given have been fascinating.  However I see this discussion going in two directions.  One is making a counter.  This is fine.  Go for it if you have all the resources and time it will require.  The Achilles heel that I see to this project is being able to duplicate the

[time-nuts] Editing, nitpicking, and graciousness

List, I, and I suspect many others, archive this list on a word processor to save its information for projects and learning. That said, there are a number on this list who do not edit their replies to a thread so we end up with pages upon pages of previous postings. If one or more people

[time-nuts] Data Professionals Press Release

List, Wrote: Data Professionals of Pleasanton California has purchased the Copyrights and existing inventory of all legacy Heathkit product documentation from Heath Company of Benton Harbor Michigan for an undisclosed amount. The new company will make copies of the original legacy manuals

[time-nuts] Isolated input oscilloscopes

Mark, Wrote: A little off topic, but needed for a time-nutty application: 4 channel scope with isolated inputs that is affordable. I have a 2 channel Tek THS730A. The Tek TPS2014 is rather pricey. Does anybody know of something affordable? If all you are looking for is isolation from ground, a

[time-nuts] DJVU and PDF

List, I’ve been trying to do a little desktop publishing on the side for 25 years and have learned a lot mostly by trial and lots of errors. I was first multiple sand-bagged by MS. Either going to a new operating system or changing to a newer version of word changed the format of completed

[time-nuts] GPS antenna info needed

My magnetic base hockey puck amplified GPS antenna for my Lucent receiver died. I had purchased it at the Dayton Hamvention so I don’t remember the dealer. I’ve found quite a few sellers on Amazon that are in the USA and their prices are all about the same. Does anyone have a recommendation?

[time-nuts] Precision Oscillator Parts FS

Fellow time-nutters, I have the following precision frequency parts for sale. Quantity (4) NOS 3.000.000 MHz Crystals. They are clear glass hermetically sealed in HC-6 holders and individually serial numbered. The were manufactured by Midland with a 51-67 production date. They were

[time-nuts] Compairing two GPSDOs Oscillators

List, wrote: I'm looking for some advice about ways I can compare the frequency of two gpsdo's. Any thoughts as to what could be obtained used for less than 1K that would be suited for this type of measurement ? OK, Here’s what I use and why. For a GPS receiver: the Lucent RFTG-M-XO GPS

[time-nuts] How does one actually do Allan variation graphs?

List, Allan variation is good. Allan variation can reveal valuable information. But when it comes to do it I feel like Lou Costello in Who’s On First? I’ve been an electronics technician all my working life. Math beyond A squared plus B squared equals C squared is beyond my abilities. I

[time-nuts] Temperature sensors and bridge amps

List, My following comments are am exploratory thought process of which I don’t profess to know the answers. Perhaps in the future experiments will provide some. So here we start. The Ni1000 SOT temperature sensor is a nickel based unit that has a basic resistance of 1K ohms at 20 degrees C

[time-nuts] Frequency referenced temperature regulator

List, Looking for a stable temperature sensor I first went to YSI. They have sold their sensor products to. Measurement Specialties, Inc. Perusing their site I came upon a Ni1000 SOT temperature sensor. It is a nickel based unit that has a basic resistance of 1K ohms at 20 degrees C and

Re: [time-nuts] TI 74LV4046 phase detector.

Gents, Wrote: The 74LV4046 from Texas Instruments is far superior to any of the earlier variants. Great Info! Thanks. And a wonderful bonus is that it is available in PDIP 16 pin from Mouser for $1.66 each. It seems like almost everything better these days is SMT. Regards, Perrier

Re: [time-nuts] 10 MHz phase detector: 4046 or separate XOR (74HCT1G86)?

Achim, Don’t re-invent the wheel. Google James Miller 10 MHz GPS. Very similar ckts are by Talbot and Bozic. The basic idea is to divide the 10 MHz to 10 KHz and then use a phase detector. All will work well. It comes down to personal choice. If you’re into complexity the Brooks Shera

Re: [time-nuts] Randomly stumbled on this...

Gents, Wrote: I have this bridge for sale... Perusing the Symmetricom web site is appears that they have built something similar and are now offering a evaluation board. Price unknown. When the Sandia Lab design was featured several years ago IIRC in Popular Science magazine and the street

[time-nuts] Changing WECO connectors to BNC

Gents, Wrote: Yikes, WECO is hard to find. Anyone know a source for WECO 439A/440A connectors and adapters? Optimist that I am, I thought they would be easy to find. Coping with an HP 3336B. Wrote: WECO connectors aren't hard to find Well, neither are gold nuggets if you want to pay the

[time-nuts] Time of death-Again

Gents, Wrote: If you want a sub-microsecond time of death, sit on a bomb like Major T. J. King Kong in Dr. Strangelove, and get your friends to time and triangulate the prompt radiation. That should be good to a few 10's of nanoseconds. Absolutely Not So! The H-Bombs are slowed by

[time-nuts] HP 5370B Output Help Needed

Distinguished Gents, As soon as I get my replacement GPS hockey puck antennas, and get my Lucent GPS receivers going I want to get into some serious testing and calibration of my rubidium and Xtal oscillators. I plan to run two GPS receivers independently into two 5370B TICs simultaneously

[time-nuts] Cesium standard prices

Gents, Talk about ask and ye shall receive! I want to thank all who have contributed answers on and off line. It appears at this time that in the case of a low end CS for me, that the remuneration is not worth the aggravation. I have far many too many projects to complete to be a nanny to

[time-nuts] Capacitor failures

Gents, Over the years I’ve purchased 15 or so pieces of HP 3XXX and HP 5XXX series of test equipment. All has worked well until a week ago my HP 3568B which had worked for years smoked when I turned it on. I had moved and had not powered it for a couple of years. Looking at the PS board I

[time-nuts] SWAP RFTG-II-XO for Trimble T-Bolt

Gents, Wrote I have a working Lucent RFTG-II-XO that I don't need. Does anyone have an extra Trimble Thunderbolt they would swap for it? I would consider other GPSDO's. Now Dick we know are a fine and honorable fellow BUT there is about a $40 spread in your favor for what you want to swap

[time-nuts] 60KHz Antenna Cont'd

Gents, Wrote: John's antenna should be in the archives. Just 100 feet of RG-58 wound on a 4 foot diagonal PVC pipe frame, with the shield split at 50 feet, IIRC. Tried resonating it, got unstable results. snip Could you please elaborate on the construction details such as co-ax used, indoors

[time-nuts] TestEquipTrader Cont’d

Gents, Wrote: 1. TestEquipTrader is NOT a site. It is a Yahoo Group, an email reflector, like febo. To access the files, etc. you have to join the Group: http://groups.yahoo.com/group/TestEquipTrader/join Thanks, now I know how to join it. Wrote 2. Lothar has good stuff at good prices, but

[time-nuts] Cesium standard prices

Gents, Time nut junkie that I am, I’d like to someday acquire a cesium standard. Several questions: price for a reasonably working unit. Any specific model that one should look for? What about the AS IS HP units that show up on epay? And if you get one how can you know or test it that it’s

[time-nuts] TestEquipTrader

Gents, I tried to go to the TestEquipTrader site. All I got was DNS server response. Reading associated posts about a Lother and his dealings make me think one has better odds at being the next president of Iran that getting a square deal there. Regards, Perrier

[time-nuts] Subject: Neat TCXO

Gents, Ernie said Have a look on ebay.280567398921. quite good TCXO. Great find! Thanks for sharing. If you didn’t know it, Motorola has been in the crystal manufacturing business for over 60 years. They usually just make them for their own products. Their reputation is excellent.

[time-nuts] Possible HP 10811 instability clue Cont ’d.

List, Wrote Some on this list mentioned having had less-than-optimal performance with their HP 10811 series oscillators. James Miller G3RUH made a slight mention of optimizing performance by readjusting the set point temperature in one of his phase detector articles. He said though time

[time-nuts] 60 KHz Receiver

Gents, Wrote: Its not just diurnal shift it plain old jumps anytime. Have been monitoring for periods from the east coast using both a Tracor 577 and 2 X HP vlf117 rcvrs. All kinds of stuff occur. Reply: That’s fine equipment that you have. What I don’t know but have to find out if the

[time-nuts] WWVB Contd.

Gents, Wrote: All of this design and mod info is wonderful and great to fill an engineering project workbook. Reply: True. I have all the precision oscillators I need. Four Rubidiums and two high stability crystal units. Four nice sized salvaged HP cases that have working power supplies.

[time-nuts] Calibrating local standards

Gents, Wrote: Have you ever tried to adjust a local standard to better than 1 in 10E7 using WWV or CHU? Also wrote: I have three Rb standards to go along with my two Thunderbolts. Wrote a reply: And which one do you believe? If any? My experience is this: Since all four of my rubidium

[time-nuts] Possible HP 10811 instability clue

Gents, Some on this list mentioned having had less-than-optimal performance with their HP 10811 series oscillators. James Miller G3RUH made a slight mention of optimizing performance by readjusting the set point temperature in one of his phase detector articles. He said though time consuming

[time-nuts] Schematics needed

Gents, I need the RF amp schematic and power supply schematic for my Austron 2100F Loran C receiver. Most needed it the RF amp boards. I really don't want to buy the CD for $35 as it's not cost effective. Please reply off list if you could help. Regards, Perrier

[time-nuts] 60 KHz Receiver

Gents, Thanks for all the input on the HP 3586B and the Austron Loran C receiver. I’ll try to distill what’s been said. It appears that using the HP 3586B for a WWVB receiver isn’t a good idea unless I would use my HP 3336B or some other method to phase lock the BFO. Since this seems to

[time-nuts] Lucent Rubidium Adjustment

Gents, I have several Lucent rubidiums that seem to be .02 Hz off at 15 MHz compared to the 15 MHz Lucent GPS. Does anyone know how to either phase lock it to a GPS of install something like a 20 turn pot to adjust the control pin frequency so an exact match may be achieved? Regards,

[time-nuts] Adding EFC

List The HP 10811 type oscillator is used for both the HP 5370B TIC, the HP 3586B SLV with the high stability option, and the HP 5335 frequency counter which I have. But none of them make use of the EFC option that I’m aware of. They do use EFC for the HP 3336B frequency generator that I

Re: [time-nuts] HP 3586B for 60 KHz

Gents, Wrote Has anybody used a HP 3586B for a 60KHz receiver? If so, how well did it work? Replied Seriously, a HP3586B would be a fine receiver for a WWVB timing setup, but way, way, overkill. Thanks. That’s great news. I have three working and can probably fix three of the other four

Re: [time-nuts] Lucent Rubidium Adjustment

Gents, Wrote I have several Lucent rubidiums that seem to be .02 Hz off at 15 MHz compared to the 15 MHz Lucent GPS. Does anyone know how to either phase lock it to a GPS of install something like a 20 turn pot to adjust the control pin frequency so an exact match may be achieved? Reply

[time-nuts] Cheap stable frequency sources

Using 4 surplus Lucent rubidiums compared to a Lucnet GPS receiver I find a consistent error of between 110 and 860 pico-seconds using a HP 5370B after running them for about two weeks. By measuring the weekly drift one could calculate the drift. I measure the offset at about 20 milli-Hz. To

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