Table of ratios (Power in / Power out) ----------------------- 1 0 dB no loss 1.05 0.22 dB (5W loss) 1.11 0.46 dB (10W loss) 1.25 1 dB (20W loss) 1.33 1.25 dB (25W loss) 1.50 1.74 dB (33W loss) 1.66 2.2 dB (40W loss) 2 3 dB (50W loss) 3 4.8 dB (67W loss) 4 6 dB (75W loss) 5 7 dB 10 10 dB 20 13 dB 50 17 dB 100 20 dB