[time-nuts] Frequency counter questions

Bob kb8tq kb8tq at n1k.org
Thu Jun 8 08:42:40 EDT 2017


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. 


> 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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