Re: [time-nuts] OXCO Spurious Output at Line Frequencies

Perhaps the aliens are replying to our signals, mostly saying "SHUT UP!!!" -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Poul-Henning Kamp Sent: Wednesday, July 13, 2016 2:18 AM To: Discussion of precise time and frequency measurement; Bob Camp

[time-nuts] HP 4352A

If anyone has an interest, there is at least one HP 4352A VCO/PLL analyzer left on ebay. $200 OBO. http://www.ebay.com/itm/HP-Agilent-4352A-VCO-PPL-Signal-Analyzer-Generator-Module-10MHz-3GHz-RF-4352S-/131847308679?hash=item1eb2b64587:g:95cAAOSwZJlXMrpQ The one I bought for $130 was missing the

Re: [time-nuts] GPS for Nixie Clock

Yo Mark! On Wed, 13 Jul 2016 19:17:54 + Mark Sims wrote: > Most > receivers with binary messages take around 1000 lines, but they > usually support more features. gpsd GPS drivers in C run from 432 to 1843 LOC. And likely a number of features are missing, but few that

[time-nuts] GPS for Nixie Clock

Lady Heather can now work with GPSD... it is one of the simpler "receivers" that it works with. It took about 500 lines of code (about the same as NMEA) to interface GPSD to Lady Heather. Most receivers with binary messages take around 1000 lines, but they usually support more features.

Re: [time-nuts] HP5370 power supply measurements

Hello, I did SMPS mod to my 5370. If I remember correctly, consumption of +5V was ~5A and -5,2V ~7A. I removed original +5/-5,2V linear regulators and replaced them with step-down converters. -5,2V side I did float original diode bridge and capasitor and put smps module to positive rail. I

Re: [time-nuts] HP5370 power supply measurements

Have you tried a 110V shaded pole motor fan? Only 60Hz magnetic noise, no brushless commutation or brushes. -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims Sent: Wednesday, July 13, 2016 9:50 AM To: time-nuts@febo.com Subject: [time-nuts]

Re: [time-nuts] GPS for Nixie Clock

On Sun, Jul 10, 2016 at 8:55 PM, John Swenson wrote: > I'm thinking about converting a Nixie clock I built years ago into using > GPS for the time base. No real NEED, just for fun. > > > Which is better to use, the 1PPS or the 10KHz? I can easily go either way. > The

[time-nuts] HP5370 power supply measurements

I have replaced the fans in all my 5370's with quiet 12V (150-250 mA) brushless DC fans running off of the 10V rail. I placed themocouples around the inside of the unit and compared before and after temperatures and found no significant differences. I have used several different models of

Re: [time-nuts] GPS for Nixie Clock

> I've done NTP before, I wanted to do this with GPS since I have never done > a GPS implementation before. You loose your time-nut certification unless you use the PPS. Most low cost GPS units speak NMEA. It's ascii text so you can debug stuff with your favorite terminal program. cat works

Re: [time-nuts] HP5370 power supply measurements

The most effective approach would be to design a replacement with lower jitter (< 5ps ) and lower power consumption (< 10W??).The hard/interesting part is the higher resolution lower jitter interpolator.Preliminary testing suggests this part isnt as difficult as first thought. As soon (within a

Re: [time-nuts] OXCO Spurious Output at Line Frequencies

In message <8bde1988-7c6b-4a20-9cbc-927cd8e85...@n1k.org>, Bob Camp writes: >Simply running test gear on batteries did not do the job. Ultimately we >wound up in the middle of an Illinois corn field with a bunch of gear >modified to run purely on batteries. The spur did go down, but it

Re: [time-nuts] HP5370 power supply measurements

Poul-Henning wrote: So I've been playing around with KICAD and come up with a design with three Traco TEN40WIR DC/DC converters (2x2411 + 2423) running off the +/- 10V rails, and I'm seriously tempted to try order a PCB just to try it out... Are the Traco converter modules cheaper where you