Re: [time-nuts] HP 115BR Clock Repaired and Ready to go

2012-10-16 Thread Timeok
Hi George, I like , I want to buy it I live in Italy and I collect and made by myself some equipment of time and frequency standard. Please can you quote me the shipping cost to Italy? thankyou Lucianpo timeok-it Il 2012-10-15 21:57 George Race ha scritto: I still have the HP 115BR Clock. It

[time-nuts] LightSquared

2012-10-16 Thread Erno Peres
The Saga just goes on...! INFO only. Rgds Ernie. Lightsquared Returns With New Proposal For GPS Fix October 4, 2012 The company asked the FCC to modify its license application so it can use its 5MHz of spectrum that haven’t caused GPS concerns. LightSquared, the now bankrupt

[time-nuts] Hp 58503A

2012-10-16 Thread Mark Danon
Hey guys, new to the group here and wanted to throw a question out there. I just picked up an HP 58503A and hooked it all up. I have it connected to my computer and I can see the system status via satstat and all looks to be working correctly. However, I notice that there is distortion on the

Re: [time-nuts] Hp 58503A

2012-10-16 Thread Said Jackson
Mark, Are you loading the 10Mhz output with 50 Ohms when you measure it? Said Sent from my iPad On Oct 16, 2012, at 6:52, Mark Danon mdan...@gmail.com wrote: Hey guys, new to the group here and wanted to throw a question out there. I just picked up an HP 58503A and hooked it all up. I

Re: [time-nuts] Hp 58503A

2012-10-16 Thread Mark Danon
I guess this it what they would call a rookie move? WOW, i feel like an idiot. I just loaded it down with a 50 ohm load and looks perfect. Thanks for enlightening me. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Hp 58503A

2012-10-16 Thread Tom Knox
I overlooked it also. Glad the problem is resolved. Thomas Knox Date: Tue, 16 Oct 2012 12:31:13 -0400 From: mdan...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] Hp 58503A I guess this it what they would call a rookie move? WOW, i feel like an idiot. I just loaded it down

Re: [time-nuts] HP 115BR Clock Repaired and Ready to go

2012-10-16 Thread Bill Hawkins
Had some interesting times with the HP-113B clock, but had to mount it in an insulated cabinet with an insulated door because it made so much 1 KHz mechanical noise. No wonder the housing for the assembly is so heavy. Did they find a quieter motor for the 115B? Bill Hawkins -Original

[time-nuts] Stanford RS620 Acting up

2012-10-16 Thread Eric Haskell
Thanks for all the responses. Well it was even simpler than I expected, All I had to do was a cold reset followed by an autocal. the unit now will power-up with the display active. Apparently it was not a hardware error at all. I now want to calibrate the internal 10 MHz reference. I read

[time-nuts] Looking for parts

2012-10-16 Thread Mark Danon
Well, that a few of you were nice enough to help me understand my HP 58503A, I wonder if anyone out there has some parts for this unit. Specifically, I was hoping someone had an Option 1 Kit, the digital display and keypad? Any thoughts, suggestions? Thanks, Mark.

Re: [time-nuts] Hp 58503A

2012-10-16 Thread SAIDJACK
No problem, happens to me too some times, usually the 10MHz Sine should be loaded with 50 Ohms, and the CMOS/TTL 1PPS pulses should be run open-ended (1M or higher).. I say usually.. because there are cases where proper termination is critical such as LVDS 1PPS outputs.. and where the

Re: [time-nuts] Hp 58503A

2012-10-16 Thread Charles P. Steinmetz
I just loaded it down with a 50 ohm load and looks perfect. One of my design pet peeves is not anticipating what users may do. For example, not anticipating that someone might terminate an output in a high impedance rather than in the rated impedance, or leave unused outputs

Re: [time-nuts] Stanford RS620 Acting up

2012-10-16 Thread Jürg Kögel
Use the Sample Size switches Juerg Koegel 2012/10/16 Eric Haskell eric_hask...@hotmail.com: Thanks for all the responses. Well it was even simpler than I expected, All I had to do was a cold reset followed by an autocal. the unit now will power-up with the display active. Apparently it

Re: [time-nuts] HP 115BR Clock Repaired and Ready to go

2012-10-16 Thread Chuck Harris
I found that a lot of the 1KHz noise on mine was caused by a bad ball bearing in the motor. I replaced it with a new bearing and the 1KHz was then only loud. It isn't the motor, it is the 1KHz drive. Airplanes with 400Hz 3 phase motors in the instrumentation are similarly loud. -Chuck Harris

Re: [time-nuts] HP 115BR Clock Repaired and Ready to go

2012-10-16 Thread Brooke Clarke
Hi: I'd characterize the noise as obnoxious to the point I could not have my 113AR in the house, but only the garage. http://www.prc68.com/I/TF_rack.html Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Chuck Harris wrote: I found that a lot of

[time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread xaos
Hello everyone, I started a new project for myself where I would use the RasperryPi Linux board as a NTP server. My goal is to design a custom board for the Pi and mount a GPS receiver on it. With this combination, I should be able to configure NTP for the Pi and thus have the Pi act as

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Azelio Boriani
uBlox LEA-5T, LEA6-T? SkyTraq Venus5? On Tue, Oct 16, 2012 at 11:06 PM, x...@darksmile.net wrote: Hello everyone, I started a new project for myself where I would use the RasperryPi Linux board as a NTP server. My goal is to design a custom board for the Pi and mount a GPS receiver on

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Davis, Zach
I have a similar setup and running now (minus the custom pcb) using a Venus638FLPx module from Sparkfun (~$50 + antenna). The module was easy to configure and had a decent 1PPS output. So far, everything is working (hardware-wise, I still have some NTP settings to tweak). I have the 256MB

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Michael Tharp
On 10/16/2012 05:06 PM, x...@darksmile.net wrote: My goal is to design a custom board for the Pi and mount a GPS receiver on it. With this combination, I should be able to configure NTP for the Pi and thus have the Pi act as a Stratum 1 NTP server. The new RasberryPI has 512MB memory so it

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread xaos
Michael, Thank you for your most valuable information. This is why time-nuts is so amazing! My goal is actually two-fold. First, I would like to have a NTP server that I can easily hook up (well, as easily as possible) without dedicating a Linux server each time. My personal use would require

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread k6rtm
I've been looking at the Raspberry Pi for a number of projects as well, and have been running one for a few weeks. My take on the early stability concerns/complaints are that the majority of those are due to poor power supplies, with some assistance from the Raspberry Pi design. Measure

[time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread sh...@impsec.net
Michael Tharp g...@partiallystapled.com wrote [RE: raspberry pi ntp server] It's not a terrible idea, but the RPI has a USB ethernet transceiver so in addition to the latency/jitter of the ethernet it also has the latency/jitter of the USB. I've been playing with a pair of Raspberry Pi ntp

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread xaos
Annoyance with small Linux boards: My single biggest annoyance is that all the I/O connectors are coming out from all 4 directions. What I mean is this: It would be nice to have ethernet+LEDs+USB+VGA(HDMI) come out from one side, and Power/I/O/RS232 from the opposite side. This way if I make

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Michael Tharp
On 10/16/2012 06:28 PM, sh...@impsec.net wrote: I'm a junior time-nut at best but it looks to me like jitter from the USB Ethernet is acceptably low, based on ntpq -p anyway: It's a minor problem at worst. There are many worse conflating factors and NTP adjusts very slowly anyway to deal with

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Chris Albertson
On Tue, Oct 16, 2012 at 3:26 PM, x...@darksmile.net wrote: Michael, Thank you for your most valuable information. This is why time-nuts is so amazing! My goal is actually two-fold. First, I would like to have a NTP server that I can easily hook up (well, as easily as possible) without

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Hal Murray
One does NOT need a dedicated server for NTP. NTP can run on a linux system that is also a web and mail server or on e linux desktop system that you use for web surfing and web browse ring, just as long as the box stays running and you don't turn it off. It's been discussed before, but

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Joseph Gray
Coincidentally, I just ordered a R-Pi yesterday. I have other potential uses for it, not NTP. If you are not in a hurry, it is possible to find the Soekris boards on ebay for a decent price. I got one last year, in a case, for $50. Joe Gray W5JG ___

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Chris Albertson
On Tue, Oct 16, 2012 at 4:37 PM, Hal Murray hmur...@megapathdsl.net wrote: One does NOT need a dedicated server for NTP. NTP can run on a linux system that is also a web and mail server or on e linux desktop system that you use for web surfing and web browse ring, just as long as the box

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Hal Murray
Question: What GPS timing module should I go with? No more Motorola Oncore so what's best right now? Who sell modules? What are the price ranges? One option would be just a DE-9 connector with power on pin ??? (I forget). You may need inverters and/or level shifters on Rx and Tx. That

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread xaos
The miniITX mobos are quite impressive. There is no argument there. However, My simple idea was this: Since I want to keep time at 3 separate locations and wanted stratum 1 NTP, I didn't want overkill. Actually my reason for 3 different locations is simple: Internet is flakey some places and

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread xaos
Err... I meant packs of cigarettes NOT cartons :) Quoting x...@darksmile.net: The miniITX mobos are quite impressive. There is no argument there. However, My simple idea was this: Since I want to keep time at 3 separate locations and wanted stratum 1 NTP, I didn't want overkill. Actually my

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread bownes
By the way, you need not use a USB serial adapter. Several folks are doing PPS on the gpio pins. Take a look here https://github.com/davidk/adafruit-raspberrypi-linux-pps And here http://www.frambozenbier.org/index.php/raspi-community-news/4439-george-lu-on-ntp-pps On Oct 16, 2012, at

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread David J Taylor
Hello everyone, I started a new project for myself where I would use the RasperryPi Linux board as a NTP server. [] Question: What GPS timing module should I go with? No more Motorola Oncore so what's best right now? Who sell modules? What are the price ranges? Your comments are most