"Frank" wrote in message
news:01c3873d$fff5f5d0$0125250a@preimuffyaouanyy.. .
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


Pretty close. Some of the other digital modes are narrower but as you
state, you need more hardware such as a computer. In addition each of the
other digital modes has its own unique set of advantages and disadvantages
in on air operation.

Dee D. Flint, N8UZE