Hi > On Apr 1, 2021, at 2:16 PM, Richard (Rick) Karlquist <rich...@karlquist.com> > 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,
https://ieeexplore.ieee.org/document/4066864 <https://ieeexplore.ieee.org/document/4066864> The switch was pretty much a done deal by the mid 1950’s. At least that was the way Motorola told the story to us ….. Bob > 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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
