[time-nuts] Frequency counter questions

[Bob kb8tq]

Hi

The heterodyne approach dates back at least into the 1930’s in general lab use. I’m
sure it dates well before that on an experimental basis. The LM and BC-221 frequency
meters are good examples of it’s use. Adding an “error multiplier” to the setup could
give you a very impressive resolution. Accuracy (or course) still deepened on what 
you had as a standard driving the error multiplier. 

Bob


> On Jun 8, 2017, at 8:35 AM, Scott McGrath <scmcgrath at gmail.com> wrote:
> 
> The heterodyne trick has been done before the first 
> 'Modern' frequency counter the HP 5245 used plug ins to extend its range to 18 Ghz by doing exactly that.   The plug in contained a tunable LO  mixer and indicator to show tuning lock
> 
> These were a pain to use but they beat the 'frequency meters' by a mile 
> 
> Content by Scott
> Typos by Siri
> 
>> On Apr 26, 2017, at 2:52 PM, al wolfe <alw.k9si at gmail.com> wrote:
>> 
>> such
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