Hi Niels, Yes, I tried a VXO circuit but it did not have sifficient stability for QRSS work. O.K. for hand keyed cw though. -- 73 Warren K2ORS/WD2XGJ FN42hi http://www.w4dex.com/wd2xgj.htm
Hello LF-group. About 50 years ago I ground and lapped FT243 crystals for use in lattice filters. I would not recommend any attempts to try doing similar kinds of things to modern crystls. It may, ho