Re: [time-nuts] potential low-RFI power supply

2020-05-18 Thread ed breya
Taka, You can set up a mini conducted-EMC lab with a few additional items that can be purchased, and some that you can make yourself, if you have the right parts. The most important item is a wideband AC current probe or transformer. A commercial clip-on type is most convenient, and ideally

Re: [time-nuts] potential low-RFI power supply

2020-05-18 Thread jimlux
On 5/18/20 11:27 AM, Taka Kamiya via time-nuts wrote: I bought one the moment information about this PS was posted here. Will you gentlemen come up with a testing method?  I have an audio FFT, spectrum analyzer up to 26.5GHz, O'scope of various kind, measuring receiver, frequency counters, 6

Re: [time-nuts] time-nuts Digest, Vol 190, Issue 30

2020-05-18 Thread Dave B via time-nuts
Hi. They call them "Low" noise, not No noise!  If you want/need the latter, then it's a linear regulated supply, or battery. Also sceptical that the "review" is hosted on the same site that is selling them... Look at the figures, for the same conditions, they tell the story, as do the spectrum

Re: [time-nuts] potential low-RFI power supply

2020-05-18 Thread Taka Kamiya via time-nuts
I bought one the moment information about this PS was posted here.  Will you gentlemen come up with a testing method?  I have an audio FFT, spectrum analyzer up to 26.5GHz, O'scope of various kind, measuring receiver, frequency counters, 6 1/2 DMM and other assorted stuff to play with.  I,

Re: [time-nuts] potential low-RFI power supply

2020-05-18 Thread jimlux
On 5/18/20 10:19 AM, Joseph Gwinn wrote: On Mon, 18 May 2020 12:00:02 -0400, time-nuts-requ...@lists.febo.com wrote: Re: time-nuts Digest, Vol 190, Issue 30 Message: 1 Date: Sun, 17 May 2020 12:53:42 -0600 From: Eric Scace To: Time Nuts email list Subject: [time-nuts] potential low-RFI power

Re: [time-nuts] potential low-RFI power supply

2020-05-18 Thread Bob kb8tq
Hi > On May 18, 2020, at 1:19 PM, Joseph Gwinn wrote: > > On Mon, 18 May 2020 12:00:02 -0400, time-nuts-requ...@lists.febo.com > wrote: > Re: time-nuts Digest, Vol 190, Issue 30 > >> Message: 1 >> Date: Sun, 17 May 2020 12:53:42 -0600 >> From: Eric Scace >> To: Time Nuts email list >>

Re: [time-nuts] potential low-RFI power supply

2020-05-18 Thread Joseph Gwinn
On Mon, 18 May 2020 12:00:02 -0400, time-nuts-requ...@lists.febo.com wrote: Re: time-nuts Digest, Vol 190, Issue 30 > Message: 1 > Date: Sun, 17 May 2020 12:53:42 -0600 > From: Eric Scace > To: Time Nuts email list > Subject: [time-nuts] potential low-RFI power supply > Message-ID: >

Re: [time-nuts] Baseline measurement with different standard. (same timebase for clock and DUT)

2020-05-18 Thread Bob kb8tq
Hi Without seeing the actual data (and setup) there is a lot of guessing in this. 1) Counter floor ADEV plots *should* all have the same slope. They are a straight line until the hit some sort of basic limit. Often this can be the temperature in the room impacting the front end delay or

[time-nuts] Free courses from the National Physical Laboratory (NPL)

2020-05-18 Thread Dr. David Kirkby
NPL do a number of courses. Some are available online, some only in a class. The online ones can cost up to £700 (GBP). However, these are free until the end of June https://www.npl.co.uk/skills-learning/free-e-learning For anyone interested in metrology, there are a lot of relevant courses.