[time-nuts] Frequency counter questions

[Scott McGrath]

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