Wang, H. Blum, J.N. Coriton, B.R.L. Jordan, K. Moeller, C.P. Nelson, R.M. Overstreet, S.A. Rimmer, R.A. Thackston, K.A. Vega, J.L. Ziemyte, G. JACoW Publishing Geneva, Switzerland 2673-7000 978-3-95450-232-5 10.18429/JACoW-NAPAC2022-WEZD3 English 597-600 injection controls power-supply feedback experiment Contribution to a conference proceedings 2022 2022-10 https://doi.org/10.18429/JACoW-NAPAC2022-WEZD3 https://jacow.org/napac2022/papers/wezd3.pdf After the demonstration of using high efficiency magnetron power to combine and aim to drive a radio frequency accelerator at 2450MHz in CW mode [1], we have used trim coils adding to a water-cooled magnetron and three amplitude modulation methods in an open-loop control to further suppress the 120Hz side-band noise to -46.7dBc level. We have also successfully demonstrated the phase-locking to an industrial grade cooking magnetron transmitter at 915MHz with a 75kW CW power delivered to a water load by using a -26.6dBc injection signal. The sideband noise at 360Hz from the 3-Phase SCRs DC power supply can be reduced to -16.2dBc level. Their power combing scheme and higher power application to industrial accelerators are foreseeing.