I cannot recommend the ATU-100 Chinese look alike after having built one. If left in the automatic mode, it goes through a re-tuning cycle EVERY time you go into transmit mode even if you do not change the transmit frequency. As has been mentioned, there is no restriction on how bad the SWR can get during the tuning or retuning cycle. In the manual mode, you can step through the inductance values or the capacitance values. BUT if you change from one to the other, the setting of what you changed from will reset to zero. This has been my experience, but your results may vary,
Stephen, KO4CVU
