[time-nuts] Re: Best frequency to start for GHz synth ?

[Lux, Jim]

On 4/1/21 11:16 AM, Richard (Rick) Karlquist wrote:
>
>
> On 4/1/2021 10:32 AM, Lux, Jim wrote:
>
>> And for what it's worth DROs have their microphonic problems too. We 
>> had a breadboard deep space transponder and you could demodulate your 
>> voice (poorly) using the spectrum analyzer's FM demod feature. Very 
>> cool. Unimpressive to the folks who wanted to push the technology.  
>> We were
>
> Back around 1970, as LM radio switched from AM to FM, the HP 608
> signal generator was losing market share because it couldn't
> do FM.  Believe it or not, there was actually an Ap Note describing
> how to obtain FM by bolting a 4" loud speaker to the 608 cabinet
> and driving it with an audio signal generator.  Those were the days ...
>
> Rick N6RK
>

and people wonder why they have a speaker in the spectrum analyzer - 
it's just for this sort of debugging.