Re: [time-nuts] Test equipment / work benches...

2010-01-24 Thread Keith Payea
Here's a couple of items from the Make Magazine site: Re-purposing IKEA furniture to hold rack mount gear: http://wiki.eth-0.nl/index.php/LackRack A workshop to dream about: http://blog.makezine.com/archive/2010/01/dream_workshop.html How many hours did that person work to make everything

Re: [time-nuts] are any time-nuts also random-nuts?

2009-12-23 Thread Keith Payea
Hello All: There are several electrical noise based random number generators, but most were concieved in a time when there was a lot less EM pollution of the airwaves. There are no magic/secret frequencies any more. I got into time-nuttiness from an interest in Radio Astronomy, and all Radio

Re: [time-nuts] Method for comparing oscillators

2009-08-03 Thread Keith Payea
I like to use a site called www.findchips.com It searches 21 US distributors for parts. It's billed as a finder of ICs, but it works well for anything electronic with a part number. No advertising, no frills, just gets the job done. Unfortunately, there are a lot of parts that start with the

Re: [time-nuts] PCB design questions thread II

2008-06-02 Thread Keith Payea
A really good way to handle the pad on the bottom of the part is to put a hole through the board right there. You usually need a bunch of vias to tie the pad to the ground plane on the bottom of the board anyway. Put one hole large enough for your soldering iron tip to reach in and touch the

Re: [time-nuts] Adding prescaler to HP 5334B

2008-03-31 Thread Keith Payea
My usual choice for dual schottky in an SOT-23 is the BAT54. It comes in four flavors: BAT54 - single diode BAT54A - Common Anode BAT54C - Common Cathode BAT54S - Series It's rated at 30V/200mA. Keith -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On

Re: [time-nuts] Mounting GPS Antenna on Steel Roof

2008-03-04 Thread Keith Payea
I hope we aren't running Matthew around in circles here for nothing. Multipath in a GPS situation is a problem where the differences in path length are significant relative to the time accuracy desired. If you are trying to make a measurement on a city sidewalk with large reflective objects

Re: [time-nuts] sync computer clock ticks

2008-01-04 Thread Keith Payea
10 milliseconds to UTC once it has settled for a while. Also be sure to check out the NTP server pool project at http://www.pool.ntp.org/. It's an effort to spread out the load on major NTP servers. Keith Keith Payea Bryant Labs [EMAIL PROTECTED] www.bryantlabs.net (707) 566-8935

Re: [time-nuts] FW: sync computer clock ticks

2008-01-04 Thread Keith Payea
The NTP built into Windows is very poor. A couple of the versions are not even compliant with the standard, and some servers will reject their requests. You have to use better client software, at least for your master controller. The CMOS clock only matters when you lose power. NTP should only

Re: [time-nuts] We are in Slashdot

2007-12-11 Thread Keith Payea
The article is also referenced at Make Magazine: http://blog.makezine.com/archive/2007/12/time_hackers.html I highly recommend this magazine for all the tinkerers out there. Keith -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL

[time-nuts] FE-5650A problem

2007-12-02 Thread Keith Payea
gotten a maintenance manual - can someone point me in the right direction? With a little guidance I might try fixing this myself. Thanks! Keith Keith Payea Bryant Labs [EMAIL PROTECTED] www.bryantlabs.net http://www.bryantlabs.net/ (707) 566-8935