From QRPme Tuna Helper: "The Tuna Helper kit is an RF sensing automatic T/R switch. Connect your antenna, transmitter, and receiver to the Tuna Helper and add 12-volt power. The Tuna Helper takes care of the rest. Key your transmitter and the RF signal is detected by the Tuna Helper and the antenna is automatically switched to the transmitter. When the key is released longer than a user-selected time, the Tuna Helper switches the antenna back to your receiver." I assemble the kit after reviewing why one might use a automatic T/R switch in their QRP station with separate TX/RX equipment. For more information, search Tuna Helper on the QRPme.com website. In Part II I will show the completed Kit in operation with a complete HF Two Tinned Tunas II QRPp Amateur Ham Radio CW Station setup and after a shakedown cruise home to someday use it for a Sota and a POTA activation. Semi-Retirement is about having fun and sometimes you don't need a $6,000 radio from Japan to do that. 72/73 de Dave - KU9L