[time-nuts] Shortt Clock Recent Measurements

[Tom Harris]

It's in the section on lock in amplifiers I think. The switch has a clever
3 way action I think but I can't quire remember how it works. I do remember
thinking how ingenious it was at the time, since I was designing lock in
amplifiers for detecting optical absorbance over 10cm path lengths using
photodiodes, instead of the tradional PMTs.


Tom Harris <celephicus at gmail.com>


On 13 December 2013 14:19, Brooke Clarke <brooke at pacific.net> wrote:

> :Hi Tom:
>
> I can't find anything in the Table of Contents or in the index.
> Can you tell me the page or title of the writeup?
>
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.end2partygovernment.com/2012Issues.html
>
> Tom Harris wrote:
>
>> There is a good writeup of the Dicke switch in Horowitz & Hill "The Art of
>> Electronics", since Horiwitz is a radioastronomer of note. I've just
>> bought
>> my daughter a copy for Xmas, poor girl, she wants to be an engineer...
>>
>>
>> Tom Harris <celephicus at gmail.com>
>>
>>
>> On 11 December 2013 13:02, Don Latham <djl at montana.com> wrote:
>>
>>  Brooke Clarke
>>>
>>>  PS When I was working in microwave electronics we talked about the Dicke
>>>> radiometer, but I haven't found any definitive
>>>> web page about that.
>>>>
>>> Gotta look at Radio Astronomy pages and history. Actually, Dicke was
>>> using that radiometer to look for the microwave cosmic background, but
>>> the bell Labs guys had the big antenna. size matters :-)
>>>
>>>
>>>
>>>
>>> --
>>> "The power of accurate observation is commonly called cynicism by those
>>> who have not got it."
>>>   -George Bernard Shaw
>>>
>>>
>>> Dr. Don Latham AJ7LL
>>> Six Mile Systems LLC
>>> 17850 Six Mile Road
>>> POB 134
>>> Huson, MT, 59846
>>> VOX 406-626-4304
>>> Skype: buffler2
>>> www.lightningforensics.com
>>> www.sixmilesystems.com
>>>
>>>
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