Hi, I have sorted out crystals according to their frequency and made a MS excel document. I user G3UUR method (details to this link https://kk9jef.wordpress.com/2016/04/25/g3uur-crystal-oscillator/) to measure the crystals. I have currently no experience of making crystal filter. Can anyone help me to make few filters. I am uploading the measurement here. There are 5 groups. 3 groups for CW filter using 3 crystal each and 2 group for SSB filter using 4 crystals each.