+++++++++++++++++++++++++++++++++ >Can the internal keyer be used as a code practice oscillator? In other >words, with transmitting a signal on the air? > Yes. On the K1 you have a special "O watt" power output setting. Only the sidetone functions, No XMTR power. FWIW. If you do use your rig this way, attach a dummy load for safteys sake. Just in case you make the setting wrong. ;-) ++++++++++++++++