[time-nuts] Antique precision timing device without, > electronics

Alex Pummer alex at pcscons.com
Fri Mar 17 18:47:20 EDT 2017


Professor Dr. Rohde of Rohde %Schwarz designed in the 1940-es one tuning 
fork oscillator for 400Hz which was to one crystal phase locked. The 
company built many exemplars from it.  I have seen one working unit in 1967.

73

KJ6UHN


On 3/17/2017 1:14 PM, Dan Kemppainen wrote:
> This is all cool stuff, and neat to read about.
>
> What's the best (Most stable, most accurate, best adev, etc.) tuning 
> fork oscillator made?
>
> What the lowest frequency tuning fork oscillator ever built? Was 1Hz 
> ever achieved commercially?
>
> Fun stuff for Friday!
>
> Dan
>
>
>
> On 3/17/2017 12:00 PM, time-nuts-request at febo.com wrote:
>> Message: 8
>> Date: Fri, 17 Mar 2017 01:34:39 +0100 (CET)
>> From: "iovane at inwind.it" <iovane at inwind.it>
>> To: Discussion of precise time and frequency measurement
>>     <time-nuts at febo.com>
>> Subject: Re: [time-nuts] Antique precision timing device without
>>     electronics
>> Message-ID:
>>     <1660573894.5853221489710879161.JavaMail.httpd at webmail-13.iol.local>
>> Content-Type: text/plain;charset="UTF-8"
>>
>> This is mine, used to calibrate some aircraft related equipment:
>>
>> https://www.flickr.com/photos/103726899@N08/33326340242/in/dateposted-public/ 
>>
>>
>> and its diagram:
>>
>> https://www.flickr.com/photos/103726899@N08/33482556075/in/dateposted-public/ 
>>
>>
>> iov
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