Our teacher want to make us a long range AM Transmitter. I try to search it on the internet and I found one simple AM Transmitter circuit in YouTube channel Afrotechmods. But I try this and not working with this OP AMP TL072. Found the revised version and my AM Transmitter is now working using LF347N. But the range is very short (about few centimeters) and our teachers want a long range AM Transmitter for our final project. I add a fixed inductor 220uH and the antenna used is 1 meter stranded wire but not improved at all.
My Can I make a long range (100 meters or more) AM Transmitter using this circuit?