[time-nuts] 2 X R-388's W/non-original cases for sale

Hi List, Besides a four sail ad, it's a bit of a bottom feeder story. Several weeks ago, I made a post of 3 R-338's for sale.  One was missing the S-meter so I listed it a *parts unit*. I also stated that FedEx shipping based on my experience  for the units with cases would be in the $125 range

[time-nuts] HP 5370B using manual start-stop

List,   I'd like to do 1000 second TIC measurements with my 5370B but I don't want to have to perchase A HP 1B prologic or similar controller for the timeing. As long as I'm interested in the TIC difference but not an absolute value is it reasonable to use the manual start/stop switches and a

[time-nuts] HP 5370 A to B conversion?

List, Is it practical to try and convert a HP 5370A to the B model.  (I know that a dedicated TN could do it. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Suggestions on getting 24 MHz?

Esteemed List Members, I have four new Midland glass encased 3.00 MHz HC 6 case style available.  Each one was given a S/N and were ordered for Hallicrafters circa.  Ovenized they would be excellent although I don't now what oven temp was specified.  Best guess is 85 C. I can send world

[time-nuts] HP DVM for shipping

List, the item has been spoken for. 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 3455A 6.5 digit DVM for shipping cost

Esteemed List Members (was Yo Dudes) I have a HP 3455A 6.5 digit DVM that has stopped working.  When turned on it fails to complete the self-check routine.  The display lights briefly. I will send it to anyone who will pay shipping from 92220, Banning, CA. 17 x 20 x 3.5 inches.  Approx 20

[time-nuts] Use the LT3042 for retrofit?

Yo Dudes, Should one consider retrofitting  HP 105's,  Austron 1250's or HP 10811 power supplies with the LT3042 for better performance?  The price is modest.  The HP 10811 suggested PS for the EFC is a 723 circuit that spedc's 6 microvolts ripple IIRC. Regards, Perrier

[time-nuts] HP 107BR Ski Question

List, In getting documentation together for my HP 107BR I discovered the manuals I was able to aquire were for prefix 333. My unit prefix is 708.  Does anyone have that prefix schematics or an errata sheet?  Or does the 708 prefix just designate another factory run? TIA Perrier

[time-nuts] HP Xtal Osc Question

List, When perusing HP xtal oscillators on ebay I noticed some cases were marked HP 10811 and the same appearing unit was marked HP 10811-60111. Are both the same for TN purposes?   If so what are the differences? Regards, Perrier ___ time-nuts mailing

[time-nuts] HP 117A spoken for

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 107BR FS

List, I bought the HP 107BR from ebay.  It arrived very well packed and is as new on the inside and 9.5/10 on the exterior.  It requires a special A/N connector for the AC power. I also bought the Artek CD and D/L rhe manual from the K4OOB site.  I discovered that my model is of a later

[time-nuts] HP 117A for ship

List, I have a 117 receiver that I never got round-to-it. The tag on the unit sayes one tube is weak.  I have at least one extra tube (6CW4 IIRC) and more likely two. It's avaiable for shipping from 92220. If interested please send an ORIGINAL email off list. Regards, Perrier

[time-nuts] HP 5065A super

List, I've been following the ongoing mod process for the HP 5065A super on the list. Two questions: 1. Are any of these upgrades applicable to the Lucnet and other Rb units? 2. Are there any other Rb units available (that don't cost you your first born child IF they can be found) that could be

[time-nuts] HP 420B Clip On DC Milliampmeter FS

Hi,   I have a HP 420B Clip On DC Milliampmeter with Probe FS as I’mmoving in the spring.   Current measured goes from 1 mA FS to 10 Amps FS.   I have not used it since I bought it several years ago.  The reliable vendor who sold it to me had guaranteedthat it worked.  Will guarantee it

[time-nuts] HP 54501A digitizing O’scope FS

Hi,   I have a HP 54501A 100MHz digitizing o’scope   Two  probes (notoriginal)   1ea  HP 54501ADigitizing O’scop Front panel Operation Reference   1ea  HP 54501ADigitizing O’scope Programming Reference   Screen is razor sharp. When first turned on a message shows in small type “cal

[time-nuts] HP Test equipment catalogs FS

Hi,   Amongst my rubble I found 4 more HP test equipment catalogs.They are 1982, 1985, 1987, and 1991.  $10each plus shipping from 92220 or $50 plus shipping for all four.  Yes, $50 for all four as I’ve got to put themin a box.   If interested, please send and ORIGINAL E-Mail.  If you do a

[time-nuts] HP Test equipment catalogs FS

Hi,   Amongst my rubble I found 4 more HP test equipment catalogs.They are 1982, 1985, 1987, and 1991.  $10each plus shipping from 92220 or $50 plus shipping for all four.  Yes $50 for all four as I’ve got to put themin a box.   If interested, please send and ORIGINAL E-Mail.  If you do a

[time-nuts] Skilled Math Editor(s) Needed

HI, At the request of a TN member (who wishes to remain anonymous)I started to reproduce:   The Quantum Physics of Atomic Frequency Standards Volume 1By Jacques Vanier  Division de Physique,Conseil National de Recherches, Ottawa and Claude Audoin  Laboratoire de I’Horloge Atomique,

[time-nuts] HP Spec Analyzer Sold

Thanks for all those that replied. 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 Spec Analyzer FS

Hi,  I have a HP 8590A that I got from Bob Camp in a trade.  In the spring we will be moving so I'm shedding some of my large TN gear. I works OK but it may need to be cal'd if one wants precise mearsurments. $365 plus shipping from 92220  about 30 lbs. Regards, Perrier

[time-nuts] Lady Heather Question

Hi, I received an unexpected lost money just at Christmas time. I had my eye on a GPSDO Symmetricom Inside GPS10MHz 1PPS GPS Disciplined Clock & GPS Ant Display Refurbished $209.99  radioshackus. It has a LCD display the shows some sat data. At his time I'm not planning on running Lady Heather

Re: [time-nuts] HP 105D FS

sound like a 105D … The 105B was a 1960’s creature that had a 5 MHz crystal in it already. Bob (who probably has eight typos in the sentence above :) > On Apr 9, 2017, at 2:46 AM, Perry Sandeen via time-nuts <time-nuts@febo.com> > wrote: > > List, > Since I've been b

[time-nuts] HP 105D FS

List, Since I've been babysitting this unit for 20 years or so waiting for a-round-it to arrive its probably to to pass it on to someone who would revive it. It is a 100KHz ovenized crystal with an external reading mercury thermometer.   It has dividers down 100Hz and is equipped with a 2 inch

[time-nuts] HP 105B FS

The unit has been sold. 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 105B FS

List, I'm selling my HP 105B that has been "cooking" for the last 6 months and the meter readings are all in the OK region and has a 5 MHz output which hasn't been calibrated. It has the pre-10811 10 MHz oscillator type and the PS is the of the earlier version where the regulating transistor

[time-nuts] Austron 1250A FS

List, I am selling my Austron 1250A.  The meter readings are all in the OK range and has a 5 MHz output which I've not calibrated. It's in good cosmetic condition. It comes with the factory manual,extender board, relay rack mounting brackets, spare fuses and a AN connector for attaching an

[time-nuts] 5 Mhz NBS Frequency Computers for Sale

List, I'm culling my too extensive test equipment inventory. I have two NBS System 358 Frequency Measurement Computers for sale It works like this:  You have a 5 MHz "A" input for your standard and a 5 MHz "B" input for the DUT. The computer has a "B" offset output that multiplies the error to

[time-nuts] Who has a hm H Maser?

 List, The discussion about building a H Maser has been fascinating however it appears that there will be a long time period before the project reaches fruition. My questions for those that have a H Maser are: Where and when did you get it and what was the cost? Exactly what do you have to do

[time-nuts] Low CostTemperature sensor

List, A while back there was much discussion about temperature sensors. One simple inexpensive one to consider would be the ZNI1000Temperature sensor. It's 1K ohms at 0C and it replicates the temperature curve of the Pt 1K ohm sensors. It's about $3 from Digi-Key.  FWIW YMMY Regards, Perrier

[time-nuts] How to create a super Rb standard

List It looks like their is as infinitely small chance of being able to get 5065. So what can be done with the telco Rb's (mine are analog tuned) to wring the best possible performance from them? Sooper Duper power supplies, Peltier (sp) cooling modules? Regards, Perrier

[time-nuts] RF cables and connectors

List, I recently bout a couple of USB male to USB male cables from Newegg. About two weeks later I received a catalog from: Brake Manufacturing LLC. They make inter-connecting cables for almost any type of connector with almost any type of co-ax as well as selling almost any RF connector one

[time-nuts] Top Posting

List, There is always going to be some top posting however it has been six or seven pages long multiple times lately. I save all these on MS word for reference later.  How about shortening these at least a little bit please? Regards, Perrier ___

[time-nuts] Fluke Voltage Standards.

List, Fair Radio which has been in the surplus electronics business almost forever has two models of Fluke standards for sale. They have a sterling reputation. FLUKE-332A  $100 Voltage Standard - Used Reparable     FLUKE-332B  $125 Voltage Standard - Used Reparable IIRC, this means they will

[time-nuts] China Oscillator Alternative

List, After all the problems that Bob Camp has noted with surplus OCXO's from China, perhaps buying the new Lucent units on Ebay may save bad words and/or unhappy actions. LUCENT/SYMMETRICOMKS-24361 L101, Z3812A, RFTG-U REF-0 UNIT -CASE OF 2 EACH  $80 So for about $50 each delivered one has

[time-nuts] Calibrating a HP 5370B Oscillator

Hi, Wrote:I am the proverbial man with too many clocks and I don'tknow what time it is. To correct this situation I have decided to calibrateeverything.   I have a HP 5370B, a HP6370A, and a HP 5328A all with the TCXO option.  Hi Peter, You can't really calibrate the 5370B oscillator.  I

[time-nuts] Gentlemen: Synchronize Your Watches!

List Time may be relative, but physicists are a stickler for accuracy. While many of us may give a few minutes’ grace to the timepieces in our homes, one group of scientists has successfully synchronized a pair of optical clocks to within a million billionths of a second. By measuring time to

[time-nuts] Concrete basement moisture proofing

Hi, I have rehabed three houses that I have owned that have cement basements. All three were in Colorado. Bare concrete will weep moisture.  The solution is to paint (actually spread) a product made by UGL.  It is $125 for a five gallon bucket.  It is a latex based product that seals the

[time-nuts] measuring noise of power supplies (was: For those that insist on using switching power supplies)

List, Two Points 1. Switching regulator power supplies are here to stay and will replace most transformer types as the are cheaper, smaller, and more energy efficient. They have improved to the point of being used in medical equipment for patient monitoring equipment that picks up milli-volt

[time-nuts] HP 105B Battery the saga continues

Hi, The battery problem becomes more convoluted every day. Due to family medical issues I have not been able to do any testing/repairing. The 105B charger is set up for nicads using some selected un-alterable charging rate so to use an internal lead acid setup requires a different ps. My unit

[time-nuts] HP 3010Axxxxx oscillator

Hi, In the two HP 105B's I recently acquired both had the 10 Mhz 3010A series oscillator which appears to be pin for pin compatible with the HP 10811 series but it has a resistor value listed on the outer case. Trying to research it, the HP 105A/B supplement vaguely said to take a look at the

[time-nuts] HP 5060-0049 extender board

List, WTB for HP 105. please contact off list if you have one for sale. 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] Late model HP 105B update

List, I Goofed. The 2848A late model info is on is on Dider's site as a HP 105B "Supplement". The HP *Supplement* instructions are: butcher a perfectly good earlier model service manual add info here and delete info there, pencil in changes making the original manual a piece of garbage. They

[time-nuts] CS Jr. Clarification

Hi, Thanks to all who replied and made the lite in my brain go on. Probably a great niche product but not for me. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Late Model HP 105B shematic

Hi, Thanks for all the suggestions for the ski but I still have drawn a blank. However I was able to get a large amount of similar data of of Dider's web site. And thanks Charles for your phase noise postings. More for me to learn. Regards, Perrier

[time-nuts] Cs jr.

List,   Several years ago we were enthralled by the NIST designed Cs that still needed cal once in a while. It was listed for sale IIRC for $1400 or so. Since then it has seemed to have fallen off of the radar screen. Does anyone have any follow-up info? Regards, Perrier  

[time-nuts] Schematic needed

Hi, I bought a HP 105B that is a later version. All the manuals I've searched for end up being for the original version. My S/N prefix is 2848Ao or 0. Plse reply off list if you have even just a ski. Regards, Perrier ___ time-nuts mailing list --

[time-nuts] HP 105B oscillator

List, I purchased a HP 105B oscillator on ebay and it arrived today.  Previous to getting it I D/L the manual and brief;y perused it. So when I popped open the top cover to see the internal parts, what to my wondering eyes appeared Not the A1 module shown in the manual but a 10811 lookalike.

[time-nuts] Using lasers for data transmission

Hi, Several (many?) years ago National Geographic magazine show a picture taken here in southern California of the state government sending red laser signals between different mountain tops to keep track what was going on near fault lines. There were no technical details on what was taking

[time-nuts] HP 5335 Manual

The manual has been sold. 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 5335A Manual FS

List, I have a HP 5335A counter factory manual VGC. $20 PLUS postage from 92220. Please reply off list if interested. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] HP Catalogs

List, I have 5 HP Test and Measurements catalogs which I will send for postage from 92220. The years are 1982, 1985 (2), 1987, and 1991. These are heavy suckers (bound books.  I estimate postage to be $10 per book. Please reply off list if interested. Regards, Perrier

[time-nuts] Oscope Tutorial

List, Usedoscilloscopes have gotten to the price where us experimenters can affordexcellent ones at reasonable prices (my Tek 200 MHz dual bandwidth was<$200). I wastrained how to use them in the military but many haven't that experience. Insorting out my papers I found a HP Bench Briefs

[time-nuts] HP Reliability

Hi, It is rather depressing to me to hear RK and others remark about the unreliability of HP test equipment. There is one area where they had outstanding equipment. I was involved with repairing HP medical equipment for 25 years and it was awesome stuff. This was the same info I got from other

[time-nuts] Cheap GPS OCXO's

Hi, One comment posted a while back warned that if the Morion OCXO's reached the limit of their EFC range the could not manually re-tuned as others are. That said, the newer ones posted seem to be using Trimble OCXO's. Regards, Perrier ___ time-nuts

[time-nuts] HP5370B & HP5345B Front-End IC Redesign Effort

Hi, Wrote: Since the front end chips are mixed signal ASIC’s, it will take more than a bit of time to replace them directly. Re-doing the entire front panel board is the most likely way to “fix”the problem. The question is - why do that at all? Just do a PC instrument that does the same thing

[time-nuts] HP Type II feet.

List, I'd like to buy up to 60 HP type II feet.  I don't need the metal bail but it would be OK to have also. Please reply off list with amount and price.  I also have some TN HP test equipment that could be used in a trade/cash deal. Regards, Perrier

[time-nuts] UBLOX LEA-5T Programming?

Hi, I have six of the older style (anodized solid aluminum case) Lucent crystal oscillators that I’d like to turn into simple 10 MHZ output GPSDO’s. I have some salvaged HP cases so I can have a linear PS and all other stuff in one package. I’ve found two different choices of GPS relatively low

Re: [time-nuts] HP5065A C-field current voltage mod

Hi,  Wrote:No, the temperature is not stable, not even close.  Wrote:Given that the TL431 is quite good at measuring temperature, that makes itunsuitable in this case.  Wrote:There is a LOT more to making a good temperature-controlled >environmentthan hacking together a DIY oven.  Thatmay be

[time-nuts] Subject: Subject: Re: HP5065A C-field current voltage mod

Hi,   Wrote: A possible solution mightbe to use two of the TL431 programmable shut regulators. [Snip]   Wrote: That would be worse thanwhat is in my 5065 now.   OK, but why?  The temperature would be stable so the resistorsand reference diode wouldn’t drift.   Is the TL 431 not

[time-nuts] Subject: Re: HP5065A C-field current is temperature sensitive

Hi, A possible solution might be touse two of the TL431 programmable shut regulators. One to replace the zener diodeand the second to form a simple oven using a thermistor and pot to set thetemp.   See: http://www.techlib.com/electronics/ovenckts.htmand TL431 data sheet for details.   Then

[time-nuts] Chinese GPSDO 10 MHz error

Hi,   On the EEVBLOG  (http://www.eevblog.com/forum/index.php)   They mention that the 2014-11-06version GPSDO that was “most extensively tested, so far (by ke5x and others).   (Has a) known bug, outputfrequency is not exactly 10mhz (9,999,999.999,800 Hz). This translates to ~2hzerror at

[time-nuts] New +/- 1 sec in 100 days mech clock

List,   http://www.dailymail.co.uk/news/article-3045499/Longitude-clock-stuns-experts-keeping-accurate-second-100-days-300-years-designed.html   Personally I’m blown away howsomeone can homer brew a mechanical clock like this.   Regards,   Perrier

[time-nuts] Thank you note

List,   I want to thank all the memberswho have answered my questions, many being you really don’t want to do this andhere’s why as well as the current group that generally posts to the list.  I really don’t want to learn by trying thingsthat have failed for others proving again to myself

[time-nuts] Distribution Amps

List,   There has been a large exchangeof ideas for various home-brew or other video box alternatives which all wouldseem to work OK.   For me it was simpler to buy asurplus HP 5087A for best offer which turned out to be $300 delivered.   Besides having 12 outputs, youhave a choice of 3

[time-nuts] 5 to 10 MHz doublers

List,   There has been a lot ofinformation on the list for 5 MHz frequency doublers.   As it is easier for me to buythan make, would using something like a Mini-Circuits surplus DBM’s be anacceptable way to go?   Regards,   Perrier  ___

[time-nuts] 10811 Alternatives

List,   It appears from Bob Camp’sexperience (and others) that the Chicoms Morion oscillators are to be avoided.   My question is: Could Bob Camp,Rick K. and other gurus with experience come up with a list of the Ebay 10 MHzsurplus oscillators that would be worth buying as well as what

[time-nuts] HP 5370A to B conversion

List, I won a 5370A from ebay. Though it seems to be missing the A channel level knob, the unit was shown powered up with the correct 0.0 on the display, although the unit was sold as non-working for parts or repair.  But the price was right with a best offer accepted. So assuming (gulp) that

[time-nuts] LM 723 Ckt Wanted.

List, Many, many years ago I think it was in EDN magazine that a circuit was published that used two LM 723 regulators. One was used as a heater circuit and the other as a voltage regulator. I lost my paper copy in moving and found that that particular circuit is behind a paywall. If anyone has

[time-nuts] Simple xtal oven for accurate clocks II

List,  This TL 431 temperature regulator circuit might be useful. www.techlib.com/electronics/ovenckts.htm Regards, PerriersandeenpaXXyatXXyahoo.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Motorola Lightning Protection Article

List, I have reproduced a Motorola Lightning Protection article from the PPRA newsletter from the early 80's. If anyone wants a copy please send me an ORIGINAL email off list and I'll send you a PDF. I will also post a copy to Didier's web site in a few days. Regards, Perrier

[time-nuts] WTT New Lucent GPSDO set

List, My  two new OEM Lucent sets arrived today. As I suspected from reading the previous posts, they are a total kettle of fish different from the older *yellow finned* series. Because I already have five of the *yellow finned* units I want to keep all my Lucent units the same style. I'm

[time-nuts] 10 MHz Filters

List,   I have seen on the net a 10 MHz filter using 10.7 IFtransformers but have no idea how well they would work for isolation with thenew style Lucent boxes.   Thoughts?   On Ebay venders are offering 10 MHz crystals for almostnothing if you buy 30.  My question wouldthese be good for

[time-nuts] Division Circuit

List,   I’ve digitized and edited an article titled* Circuit DividesFrequency by N+1 by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.   Essentially, this circuit is expandable and allows for adivision by any number plus one.   Anyone who wants a PDF copy please send me an original

[time-nuts] Lucent Unit Differences

List, Wrote [Snip] The chain in the Z3810 / 3811 / 3812 Lucent boxes is *much* different than the setup in the earlier parts. The phase noise and ADEV on the Z3810’s is better than what you got on the earlier versions. That’s good to know. I only have the older style units. It will be

[time-nuts] Bypass Capacitor Kit Prices

for orders. Delivery will probably be mid Dec. I won’t cash your check until I ship you your parts. My address is Perry Sandeen 661 La Costa Banning, CA 92220-5317 Also if one wants one or both of the lists just for reference, please send me an original email and I’ll send you a copy

[time-nuts] Lucent GPSDO comments

Wrote: At some point we will get into hacking the main board to switch from 15 MHz to 10 MHz. One doesn’t have to that if one uses the two IC divide by 1.5 circuit I offered the list. I specifically found it so I didn’t have to hack the innards. Wrote: The great news is the oscillator is 5

[time-nuts] Electrolytic Capacitor Redux

List, Thanks to all for their comments. Wrote: The high grade aluminum electrolytics and the tantalums will look quite different on a network analyzer as you sweep them from 100 KHz up. OK. Since these of just being used for DC PS bypassing on individual boards I think I’ll be OK with the

[time-nuts] Capacitor Group Buy

List, The common denominator capacitor for the HP 3586 is 470 uF/ 50V. The HP 3586B uses about 18. The capacitor is a Panasonic P/N 667-EEU-FR1H471B The common denominator capacitor for the HP 5370B is 105C / 6,000 Hr. 150 uF / 50V. The 3586 uses about 20. I am willing to sell them for

[time-nuts] Electrolytic Capacitor Question

List, OK everybody, let’s not get our pacemakers wound upG The problem. (Long Intro) I have about 15 pieces or so of older HP test equipment. 3586B, 5370B, 5335A to name a few. Because of their age of 20+ years a few have failed and need repair. I have decided to go on a wholesale

[time-nuts] DIP Is Dead R.I.P

List, Wrote: The days of DIP parts are drawing to a close. I was shocked, absolutely shocked, really, when I looked at the latest Mouser catalog about the lack of PDIP I.C.’s. That said, we are faced with a dilemma. In all my HP test equipment I probably have 500 or more PDip IC’s, so what

[time-nuts] HP 3586B Info

List, I've assembled three PDF documents for the HP 3586B. An electrolytic capacitor replacement list, a 15 KHz IF pick-off doc and the Beethoven audio test. You get three for the price of one: FREE. If interested, please send me a new email off line. Regards, Perrier

[time-nuts] Lucent Rubidium Schematics

List, I have just finished digitizing and repaginating *Modifying Lucent RFG-M-RB Rubidium Frequency Standard* by Ivan Makarov. (m...@makarov.ca Copyright © 2011 VE3IVM). He has made many modifications to solve a number of problems that have been mentioned on the list lately. If anyone

[time-nuts] GPS W/10KHz

List,   Wrote: You're looking for the older Rockwell/Conexant/Navman Jupiter-T ones. Some default in Motorola binary compatibility mode, with only 8 channels visible. Due to scarcity they are getting way too pricey...   You might be better off with the newer uBlox NEO/LEA-6T, with configurable

[time-nuts] GPS W/10KHz

List,   Wrote: where is a good source of GPS receiver modules I need one which has 10kHz output to phase lock a quartz oscillator. Fluke.1 Motorola ONCORE M12+T timing gps receiver 1pps 100hz eBay item number:290656401551     Also RDR   There is another china seller that has them(10KHz) with

[time-nuts] EFC divider resistors

All,   The REF 102 from TI is a +10 reference with a TC of 2.5PPM/max. Using two 1% 50 PPM metal film Xcion resistors on can make a +5 V regulator that is far superior to a 7805.  Cost is about $7 from mouser.   If one needs to have an adjustable resistor in a circuit perhaps one of the digital

[time-nuts] Small DPM clocks

List,  What I am looking for is a way to display Local Time (MST) and Zulu (GMT) time in a small (6 X 8 or similar) package. There must be two displays and both lock up to NBS. Has anyone seen such a thing?   Hi Martin,   If you look on Ebay and type in LED automobile clocks, there is a large

[time-nuts] Jammer Redux

List,   Tonight on the news they reported that an EMS helicopter had to make an emergency landing as the pilot or co-pilot was blinded in one eye by a green laser.  As of the report time his one eye was still blind.   Now that the proverbial feces has hit the old fashioned rotater cooling

[time-nuts] Speaking of 5370s

List, I have four 5370b units.  Two of the three lost the frequency input channel while I was using it for long term frequency monitoring.  The fourth unit I bought for “parts or not working” had the same frequency input problem.   Do we see a trend here?   Verifying that the input switch(s) are

[time-nuts] Lady Heather W/O a PC: Alternative

List, Wrote The point is that this only makes it cheaper.  It is still a PC running Windows in some other room.   Not exactly.  You missed what I was trying to say about programming: which was I can’t do it and don’t want to learn how to do it.  It’s just not my cup of tea.   It is a cheap

[time-nuts] Spec Analyzer Redux

List,   Wow!  Thanks for all the good advice shared on and off list.   I guess that I didn’t make clear is that I really don’t need anything below 100 KHz. I bought my 3585a for its upper range to 40 MHz for use with HF receivers.   One great idea suggested that I never thought of is to get a

[time-nuts] HP 117 from ebay

  List,   I bought one of them for several reasons besides that I really wanted it.   1.  There is plenty of real estate to install Paul’s demod circuit.   2.  It is large enough so the nuvistors can be replaced with dual gate mosfets (I have lots of them). Also sometimes replacement nuvistors

[time-nuts] Spectrum Analyzer Suggestions

List,   I just purchased a HP 3585 spec analyzer on E bay for a reasonable price.  I wanted this instead of the 181 series as the range was more to what I’d be using and it was of a newer vintage.  The 3585a goes from 10 Hz to 40 MHz which is a most useful range for my purposes. so far, so good.

[time-nuts] Posting Rules

Charles wrote: Please keep your political comments to yourself and off the list (however humorous you might think they are).  This is simply not the place for them.   Charles,   On the two lists we both subscribe to, you always seem to have something to say about almost every post.  Often it

[time-nuts] How dangerous if a Rb lamp broken?

Hui and all,   You have absolutely NOTHING to fear.  Here is why:   If in the USA it was found that it MIGHT possibly hurt something on the endangered species list [Humans might count also in some situations.]  The following would happen.   1.  A Transportation Security Agency [1.6 Billion

[time-nuts] HP 5870B Electrolytic Cap List

To all my fellow list heretics who believe in change before failure,   I have put together a list of AFAIK, all the electrolytics from the 5370B service manual, their location, and possible Nicicon 105 C rated capacitors for replacement.   Not on the list, but what I plan to do when I replace

[time-nuts] Dropping mains voltage

List,   Another economical  way to auto regulate your AC voltage is using servo motor voltage regulators.   They are a bit strange but the ones I’ve seen seem to work well, even the cheap ones from China.  But do check that they have a fuse.  They also have a trimming pot inside if you want to

[time-nuts] HP E1938A Oscillator

List,   I was looking on Ebay for some HP E1938A oscillators   What I found listed were:   HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l   HP E1938-60201 Ovenized Crystal Oscillator  (on a PC board) $100 Tomy Chou   HP E1938A Ovenized Crystal Oscillator  W/O a PC board

[time-nuts] Wanted: HP 117A

List, I'd like to buy or trade for a working  HP 117A.  I don;t need the HP antenna. Please contact off line if interested. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Dual-bandwidth loop for VCO phase lock

List, In sorting through my mountain of old papers preparing for our moving, I cam across an article that I had saved from Electronics magazines  Engineer's  notebook  in 1975. The article was titled Dual-bandwidth loop speeds phase lock I OCR'd it and re-drew the illustrations and schematic. 

[time-nuts] Answers to regulator choices comments

Wrote: If you are in the US (maybe elsewhere) you can request two free samples.   That might work for projects on and two, but what about projects three and onward?     Wrote: I suppose that the same philosophy [paralleled regulators] would apply to getting more power with a 7805 farm.   It does

  1   2   3   >