I'm working on a school project where I'm building an AM radio transmitter. The purpose is to make something like the iTrip but for AM, where you can plug your ipod in and hear it on the radio. I've made the oscillator, modulator, and amplifiers, but I'm not sure what to do about the antenna.
It broadcasts from 550Khz to 750Khz. I know antennas for these wavelengths are huge and impractical for my purpose but is there away to at least increase the power so that it can be heard for about 20-50 ft? Right now it works but only to 3ft because there is no antenna. Thinking about a loop antenna but I'm not sure how to make one or hook it up.
Also, is there a better way to modulate that doesn't use transformers - which I don't have and have no idea where to find. It can be single or dual sideband.
Attached is block diagram and modulator circuit. Values on the modulator circuit are wrong on the schematic but right in my actual circuit.
Thanks
It broadcasts from 550Khz to 750Khz. I know antennas for these wavelengths are huge and impractical for my purpose but is there away to at least increase the power so that it can be heard for about 20-50 ft? Right now it works but only to 3ft because there is no antenna. Thinking about a loop antenna but I'm not sure how to make one or hook it up.
Also, is there a better way to modulate that doesn't use transformers - which I don't have and have no idea where to find. It can be single or dual sideband.
Attached is block diagram and modulator circuit. Values on the modulator circuit are wrong on the schematic but right in my actual circuit.
Thanks
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