This is the cheap AM transmitter that is for sale on Ebay, Aliexpress, and Amazon, for around $15-20. It's a "3 channel", battery powered, low power, AM transmitter, and you can use it to transmit any audio signal to your nearby old-school AM radio! Let's use it to listen to the classic Sky King radio program!
Ebay link: https://www.ebay.com/itm/285205388594
Amazon link: https://www.amazon.com/Transmitter-Channel-Amplitude-Modulation-Receiver/dp/B0CDHS3D6P
Aliexpress link: https://www.aliexpress.us/item/2255800645110915.html
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