The experimental apparatus is shown in Fig.1. A chamber with size of 500 × 1000 × 1000 mm3 is made of stainless steel type 316 using 4 magnetrons comparison of drying using microwave power level with a power output of 100-4,000W at 2,450MHz frequency, convection oven with a maximum power output of 5,000 W, air velocity 2.00m/s at 40-180C, circulating fan using distribution hot air and waves.