What is software defined radio?

Episode 1423 (50:55)

Alan from Los Angeles, CA

Alan wants to get back into Ham radio and has heard about SDR, or software defined radio. Leo says that most modern radios are software defined and he can get back into it by just installing the software on his computer. Alan should check out EchoLink. He should also listen to Ham Nation on TWiT. He'll still need a license, but it's a good way to get back into it.