Do you have an Icom IC-7300, and a manual tuner, but no CW key? If so, here is a quick way to get the IC-7300 to transmit CW, using only the mic. This method does not require the use of a dongle for the tuner connection, leaving you with the ability to use an automatic tuner between the radio and amplifier, and still be able to use the manual tuner after the amplifier.

https://www.youtube.com/watch?v=O3JESy8t9co