This is a simple modulator operating on the AM (MW) broadcast band. I demonstrate it here using a Sony mp3 player and an Ekco valve radio from the late 1950s. It is an easy means of feeding audio sources into such radios, without making any connections or modifications to the radio at all.
(The connection to the audio source is a standard stereo 3.5mm jack, not a coax as I say in the video.)
Details on this device can be found here:
[ Ссылка ]
[I am not being sponsored for this video, and am not connected with the maker/supplier of this item, I'm merely sharing this video for the possible benefit of other hobbyists.]
