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The bandwidth is the dealbreaker. Commercial FM radio has a necessary bandwidth of 270KHz. That’s not a lot when your carrier frequency is around 100,000KHz. It
by kstrauser 2y ago
The bandwidth is the dealbreaker. Commercial FM radio has a necessary bandwidth of 270KHz. That’s not a lot when your carrier frequency is around 100,000KHz. It’s a whole lot when your carrier is around 1000KHz.
For comparison, commercial AM mono bandwidth is 10KHz. SSB AM ham radios use 2.4KHz.
- anticensor 2y agoCommercial AM has a 5kHz bandwidth (4.5kHz in Europe), commercial FM 50kHz (29kHz if mono). The remainder of the channel is guardband.
- kstrauser 2y agoSource for 270: https://en.wikipedia.org/wiki/FM_broadcasting https://en.wikipedia.org/wiki/FM_broadcasting. Search there for “necessary bandwidth”. For AM, that’s 5KHz+-, or 10 total.