G'day, Whilst not an Elecraft kit, I've just been reading in the GQRP magazine "Sprat" about the W8DIZ Frequency Reference Kit. A 20MHz TXCO with buffered outputs of 10MHz, 5MHz and 2.5MHz. Fine tune control to net with e.g. WWV. Looks like the answer for rabid calibration tweaking types. Gonna get one. Regards, Mike VP8NO (IOTA SA-002) GQRP 10148 QRP-Canada #57 K2/100 #1400