[78-L] Pallesen Radio

[Steven C. Barr]

----- Original Message ----- 
From: "David Lewis" <uncledavelewis at hotmail.com>
> Great early Danish ad for radio:
> http://www.europafilmtreasures.eu/PY/310/see-the-film-pallesen_radio'
> But isn't the date of "1915" impossibly early for the type of radio on 
> sale here?
> Uncle Dave Lewis uncledavelewis at hotmail.com
>
Radiotephony became possible once it became possible to generate the
requisite "carrier wave!" This, in turn, was possible once "Audions" could
function as oscillators. This date should be readily available...?!

Prior to this date, carrier waves were generated using high (for then!)-
frequency alternators...mechanical AC generators. The frequency of
"carrier waves" was limited by mechanical possibilities...?!

Steven C. Barr