Jack ...

^ CW is an unmodulated transmission ...

^ Radioteletype (RTTY and AFSK) also use unmodulated carriers. On HF
^ bands, most use unmodulated Lower Sideband. As with CW, the receiver
^ reinserts the carrier, causing the AF-shifted beat note.

And CW requires only the transceiver and key while the other data types
require another, often more expensive, piece of hardware.


So am I still correct that the advantages of CW a

- Narrower bandwidth. The bandwidth is effectively even narrower because
overlapping adjacent signals can still be distinguished by the human ear.

- Greater effective range.

- Less equipment than other data types, which also have greater bandwidth.

- Can be used without a microphone and without a key. Just open the box and
short a couple of contacts.

Frank