Total posts : 45366
Thanks for your explanation… It’s more clear than ever. Can you tell me how much the BW is for a commercial AM broadcast normally?
With the Cool Edit 2000 application, I try to convert a sample of MP3 file to 1.8 kHz to see how quality sound is (for Q=824). But my computer can’t play at this sample. So, i tried to convert to 4 kHz and my computer was able to play at this frequency. I found that the sound wasn’t clear at all compared of 12.1 kHz sample. But despite of the BW so narrow (1.8 kHz), i understand that the efficiency of antenna is much higher. But i’m not sure that my neighbors will like to listen my part 15 AM with this BW.
If you can, I would like to have the magic formula for the Q and for the r-f BW based on the ground loss, length of the antenna and the frequency.
One last thing, can you give me some numbers for broadcast on 1700 kHz with 2 ohms rf-ground, and with 25 ohms rg-ground.
Thanks in advance!!!