[sdiy] AoE: X is coming soon!

[rsdio at audiobanshee.com]

Hi Magnus,

I only have a couple of follow-up questions:

1) Do you have any cats?

2) Do you have any photos of cats sitting on your hydrogen maser clock reference?
(photos of cats sitting on rubidium and/or cesium clocks count, as well)

Brian

p.s. Just kidding. This might not be safe for cats.


On Jan 24, 2020, at 4:51 AM, Magnus Danielson <magnus at rubidium.se> wrote:
> 
> Hi Achim,
> 
> On 2020-01-23 21:38, ASSI wrote:
>> On Thursday, January 23, 2020 12:48:07 AM CET Magnus Danielson wrote:
>>> Mine arrived today.
>>> 
>>> More of the same good stuff that is in the rest of the book. It carves
>>> on more of the reality, ways to make good amplifiers, ways that
>>> disturbances can be made, and then healed. More of the life chores and
>>> ways to deal with them. I look forward to read more in depth.
>> No mention of hydrogen masers?
> 
> No, in general, the part about oscillator noise and stability is leaving
> a bit to be desired, like about everything.
> 
> For those that do not get the joke, I recently too deliver of an surface
> mounted oscillator, at 250 kg is becomes fairly well mounted on the
> surface it stands on. It has really good phase-noise, and at observation
> time 1000 s it is down to 3E-15 in Allan deviation, which is the
> frequency stability as used by the big guys. I had one of the NPL
> scientists be in total denial for the fact that I have a hydrogen maser
> at home, at first he said I didn't have one, but he had to ask multiple
> times after showing me their primary reference cesium fountain if I
> really have a hydrogen maser.. at home. Sure I do. With a few rubidiums,
> cesiums and so.
> 
> The 1,420405751 GHz clock is tweakable to within a fraction of a Hz...
> end-to-end of the scale.
> 
> Some 20 years ago I wanted to improve my ability to measure analog synth
> oscillators tracking. Let's just say it got somewhat out of hand. At
> least I know much more about how to measure oscillators and characterize
> them. I am now part of the IEEE standardization work on the topic, at
> the request of NIST.
> 
> Cheers,
> Magnus
>