nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg demos eCash by sound using the free ham radio software fldigi.

#eCash #fldigi #ham #hamradio #amateurradio #hamr nostr:npub1dx5q2el8nd4eh3eg9t2e25fd7zuqg7zxz6ldkc3uzgh66ss2yc6st288sj nostr:note1tfzmm4fapq04jq76e22mgc8xpe5nu7hrdfa95d8mlen9m6yepryq3kfcmv