Re: [time-nuts] TV Signals as a frequency reference

When the transition to digital only happened, I happened to ask a ham friend who was chief engineer at the local Fox station what they were doing with all their gear. He said probably taking it to a hamfest. I said if you chuck your rubidium or cesium standard let me know. He started laughing a

Re: [time-nuts] Thunderbolt question

Thanks everyone. This has given me a lot of things to check as I further investigate over the next few evenings. I'll let you know what I find. Chris > On Aug 5, 2017, at 3:07 PM, Charles Steinmetz wrote: > > Arthur wrote: > >> I’d say it would be an MMIC amp similar to this device [Avago

Re: [time-nuts] Thunderbolt question

ut of this filter. I'm suspecting this Q13 part may be bad but I'm not sure what the part is. Searching the net for 51A marking came up with a large 2 pin shottky which this isn't. Chris KD4PBJ > On Aug 4, 2017, at 5:27 PM, Chris Waldrup wrote: > > Thanks guys. >

Re: [time-nuts] Closeup photo of Thunderbolt PCB around U19 needed- found

Part is MMBT3904 > On Aug 4, 2017, at 5:39 PM, Chris Waldrup wrote: > > Sorry. Should have changed subject line before. Just changed it. > > The EEV blog link shows the transistors but it's too fuzzy to read SMT part > markings. If I can get a code I'll try and lo

[time-nuts] Closeup photo of Thunderbolt PCB around U19 needed

Sorry. Should have changed subject line before. Just changed it. The EEV blog link shows the transistors but it's too fuzzy to read SMT part markings. If I can get a code I'll try and look it up online. Thank you. Chris > On Aug 4, 2017, at 5:27 PM, Chris Waldrup wrote: >

Re: [time-nuts] Thunderbolt question

Thanks guys. I've opened up my T bolt and noticed a SOT23 packaged part has the top blown off. The PPS BNC jack has U19 beside it. The next part is blown. Could someone take a closeup of the five parts around U19? The intact parts are marked: 5Dz 1AM and two 2Az parts. Chris > On Aug 4, 20

Re: [time-nuts] Thunderbolt question

ard once in my Datum Starloc II and it was easy. Hope this is a similar Motorola Oncore. I'll open it up tomorrow and see. I need to find a better source of the Oncore UT Plus modules rather than waiting for the Chinese slow boat. Chris > On Aug 3, 2017, at 10:21 PM, Chris Waldrup

Re: [time-nuts] Thunderbolt question

said to be in holdover. > >> On Aug 3, 2017 9:29 PM, "Chris Waldrup" wrote: >> >> Hi, >> >> I just noticed the laptop that is always connected to my Thunderbolt had a >> yellow block under COM1 on the Tboltmon program where it normally is green. &

[time-nuts] Thunderbolt question

Hi, I just noticed the laptop that is always connected to my Thunderbolt had a yellow block under COM1 on the Tboltmon program where it normally is green. Also the date up on the screen was in early July. Satellites were still shown. The counter I leave connected still shows a 10 Mhz output. I

[time-nuts] TAPR kit- Success!!!!!

Just sent this to in response to an off list response from a member but I wanted to share with the group. I'm now seeing at least 8 satellites with just the tiny patch antenna sitting out on a chair on my deck (not connected to my main time system antenna out in the back yard) Success! Thanks

Re: [time-nuts] Problems with TAPR Oncore M12+ kit

I'm using a little 5V Trimble mag mount patch at the bench for testing. Chris > On Jul 4, 2017, at 12:02 PM, Gregory Beat wrote: > > Chris - > > I was not aware that you were having issues with the TAPR Experimenters Kit. > I am finishing a DIY GPS kit build from "assorted parts sources" for

Re: [time-nuts] Problems with TAPR Oncore M12+ kit

Hi, Definitely RX LED on and not TXD. I'll look more into this tomorrow night when back at my bench. Chris > On Jul 4, 2017, at 12:02 PM, Gregory Beat wrote: > > Chris - > > I was not aware that you were having issues with the TAPR Experimenters Kit. > I am finishing a DIY GPS kit build fro

[time-nuts] Problems with TAPR Oncore M12+ kit

Has anyone else received a unit they can't get to work? I got my unit finally boxed up a few weeks back. The PPS LED flashes and power LED and RXD LED's light but the TxD doesn't. I've ordered replacement MAX chips and 74ACT04 chips from Digi-Key but this didn't solve the problem. As a next ste

Re: [time-nuts] TAPR GPS Experimenters Kit

Last night I measured the voltages on the serial lines with a DMM. The TXD coming from the GPS was a solid -5.9 V. The RxD was 0 V. Chris > On Jun 14, 2017, at 10:53 PM, Chris Waldrup wrote: > > Hi Greg, > > I'm using a 12 V 7 Ah gel cell for the power and have a small

Re: [time-nuts] TAPR GPS Experimenters Kit

Hi Greg, I'm using a 12 V 7 Ah gel cell for the power and have a small Trimble magnetic puck antenna connected just for testing. Chris > On Jun 14, 2017, at 1:22 PM, Gregory Beat wrote: > > What is your DC power source? > https://www.tapr.org/images/com-cbl.jpg > > I used pin 7 (Black, DC G

Re: [time-nuts] TAPR GPS Experimenters Kit

Hi, I have my board packaged up and am trying to get it working. Last night I built the cable to split out serial, 1 PPS and power. My unit powers up, and the 1 PPS and RxD LEDs are flashing and the green power LED is solid on. However I can't get serial to work and the TxD LED isn't flashing.

Re: [time-nuts] HP 5062C Service Manual

Another good source is X-1 Technology in Melbourne FL. The owner is Mike Daly. We used them at a previous employer and Mike always got us circular connectors at a fraction of the price Mouser or Digi-Key could. Chris > On Jan 8, 2017, at 11:47, wrote: > > Dick, > > The AC connector used

[time-nuts] DirecTV question in regards to leap second

Hi, I noticed something interesting tonight. Right after I took the leap second photos out in my workshop I came inside to show the photos to my wife and son. My wife was in the living room yelling at the TV, apparently the hockey game she was watching was messing up and the audio was dropping

Re: [time-nuts] I love the smell of tantalum in the morning

Hi Tom, I'm a SMT rework technician for a large satcom and defense company. I have a shop at home too and all the equipment to repair this if I can be provided with the replacement cap. Please let me know if I can be of help. Chris KD4PBJ > On Nov 5, 2016, at 14:12, Tom Van Baak wrote: > >

Re: [time-nuts] Lucent RFTFm-II-XO- Lady Heather question-having issues

> > I have assumed that your GPSDO and the COM port have the same baud, stop > bits(s), and parity. > > Ken > WA2LBI > > >> On Sat, Sep 24, 2016 at 1:30 PM, Chris Waldrup wrote: >> >> Hi, >> >> I downloaded the latest version 4.00 beta of lady Hea

Re: [time-nuts] Lucent RFTFm-II-XO- Lady Heather question-having issues

Hi, I downloaded the latest version 4.00 beta of lady Heather on my win XP laptop. Installation creates two icons on my desktop. One says KE5FX TBolt (Seattle USA) and has the lady Heather icon and the other has the icon and simply says Lady Heather. When I try and open the Lady Heather icon (

Re: [time-nuts] Lucent RFTFm-II-XO

I also wanted to mention that I can't get the Lucent to communicate at all with the TBoltMon program so that's why I decided to try LadyHeather. I do hope I connected the cable pins right, I connected Lucent RS 422 TX pins to the USB to 422 adapters RX pins and the Lucent 422 RX pins to the adap

Re: [time-nuts] Lucent RFTFm-II-XO

he drivers (now or down the road). > > Bob > >> On Sep 13, 2016, at 11:44 PM, Chris Waldrup wrote: >> >> Hi, >> >> Regarding the Lucent box- I wanted to let everyone know that once it locked >> to satellites, I have a 10 MHz out. >> The output was a

Re: [time-nuts] Lucent RFTFm-II-XO

Hi, Regarding the Lucent box- I wanted to let everyone know that once it locked to satellites, I have a 10 MHz out. The output was a square wave with some ringing, but I built a three element low pass filter and now I have a really nice 10 MHz sine wave. Thanks to all! Last question I see

Re: [time-nuts] GPS? Antenna

It's a Huber Suhner. Chris > On Sep 5, 2016, at 21:26, Glenn Little WB4UIV > wrote: > > Pete, > > I do not know if I can send a picture to the mailing list. > > I am sending this to you and the list. > > The antenna is 4 inches from tip of cone to bottom of type-N connector. > It is 2 5/8"

[time-nuts] Lucent RFTFm-II-XO

Hi, I managed to get one of these Lucent boxes from a local ham that moved away a couple years back. I finally got around to modifying it today with Skip Withrow's mod to add 10 MHz output. I connected an antenna and after a few minutes the yellow and No GPS and Fault LEDs go out and the gre

Re: [time-nuts] Lucent boxes

gt;>>> Douglas Baker >>>> Sent: Monday, July 18, 2016 2:39 PM >>>> To: Discussion of precise time and frequency measurement >>>> Subject: Re: [time-nuts] Lucent boxes >>>> >>>> Chris, >>>> The RFTGm ("m" for mini

Re: [time-nuts] Lucent boxes

receiver which is > essential for disciplining. Both boxes operate at 24 VDC and there is > an interface cable drawing on line at KO4BB's web site. Never tried to > hook them up together, but it might work. Maybe others here may know. > Good luck with it. > 73's Doug &g

[time-nuts] Lucent boxes

Hi Everyone, I have two Lucent RFTG boxes in my workshop. The XO is a loaner. I'm curious if they will interface with each other or (most likely) they are a different series as the interface connectors on each have a different number of pins. One is marked RFTG-u REF 0 The other is RFTGm-II-XO

Re: [time-nuts] UPS for my time rack

tennas and have almost completely switched to double shielded cables for > my amateur radio and time nuts activities. > Hope these comments are of some interest. > Mark S > VE7AFZ > Sent from my iPhone >> On Oct 10, 2015, at 6:20 AM, Chris Waldrup wrote: >> >> Hi, &

[time-nuts] UPS for my time rack

Hi, I have decided I'd like to get a UPS to put on the rack containing my Thunderbolt, the laptop that runs Lady Heather, and frequency counter.  Has anyone had bad experience noise wise with the APC brand units like are available on Amazon and at Staples? I'd like to get one that doesn't gener

Re: [time-nuts] A few questions about Tboltmon

g > down. That’s a worthy goal…having your house burn down *and* finding that your > insurance does not cover it could be a major bummer. > Buy the arrestor …. > Bob >> On Aug 13, 2015, at 9:57 PM, Chris Waldrup wrote: >> >> Thanks everyone. In addition to the blown transi

Re: [time-nuts] A few questions about Tboltmon

Thanks everyone. In addition to the blown transistor that feeds 5V down the coax, the one week out of box Motorola hockey puck antenna was blown too. I bought it in 2006 as a spare and I broke the shrink wrap two weeks ago.  So I will order another spare but see if I can fix this spare.  It's d

Re: [time-nuts] Has my TBolt gone south ?

I had an issue with mine and worked it out last night thanks to all of you great list members!! Thank you!! Turned out to be a blown PNP SOT package transistor that feeds 5V to the antenna.  Do you have 5V on the F connector? I saw your Lady Heather screenshot said antenna ok, but this is

[time-nuts] Thunderbolt issue found

Hi Everyone, Thanks for the suggestions this past weekend for helping get my new Thunderbolt fixed. I got back into town last night late so couldn't tackle it until tonight.  I put a DMM on the F connector and I didn't have 5V on it. Opening up the case, I found the top blown off one of the SO

Re: [time-nuts] A few questions about Tboltmon

Is it possible I bricked the unit by doing the factory reset? If so can I update the firmware somehow to get back to where I was?  Thank you.  Chris KD4PBJ — Sent from Mailbox On Fri, Aug 7, 2015 at 4:14 PM, Chris Waldrup wrote: > Hi Everyone, > When I got home last night fro

Re: [time-nuts] A few questions about Tboltmon

Hi Everyone, When I got home last night from work, my thunderbolt was plugging along, tracking about 5 satellites. The ppb error was a few hundred though.  So in Tboltmon I did a factory reset and everything changed to question marks. All the critical alarms came up green and self survey wen

Re: [time-nuts] A few questions about Tboltmon

: > On Wed, Aug 5, 2015 at 7:16 PM, Chris Waldrup wrote: >> Hi, >> >> >> But when I unplugged the AC power from the Thunderbolt and plugged it >> back in, I was back to six satellites. >> I had thought that the GPS satellites I am able to see from my locat

Re: [time-nuts] A few questions about Tboltmon

Hi Bryan, I didn't do that. Is this something accessible under one of the tabs? Chris — Sent from Mailbox On Thu, Aug 6, 2015 at 5:21 AM, Bryan _ wrote: > Did you do 48 hour precision first survey first to get an accurate Lat/Long/ > altitude?. You will probably need to start with a

[time-nuts] A few questions about Tboltmon

Hi, I got my new Thunderbolt up and running this past weekend but I have a few questions. I understand Lady Heather is a better program, and I have downloaded it. However right now I am trying to get things right with Tboltmon first. I had used it with my previous GPSDO, a Starloc II. I hate t

Re: [time-nuts] Thunderbolt serial question

good FAQ on the tbolt at > leapsecond: > http://www.leapsecond.com/tbolt-faq.htm > mg NG7M > On Sun, Jul 26, 2015 at 10:47 AM, Chris Waldrup wrote: >> Hi, >> >> >> My Datum Starloc recently died after 12 years in service so I am replacing >> it with a Trimbl

[time-nuts] Thunderbolt serial question

Hi, My Datum Starloc recently died after 12 years in service so I am replacing it with a Trimble Thunderbolt.  The Starloc used a DB9 female to female null modem cable but I noticed a minute ago when getting ready to connect the Thubderbolt to my laptop that the Thunderbolt has a female DB9 co