As a follow up, as I read the code, it appears the parameters for LSB_CAL and SIDE_TONE stored in the EEPROM are not used in the version 6 code. SIDE_TONE is at location 12. There is a CW_SIDETONE at location 24 that is used.
Also, in the code, I see that there are range checks for most of the parameters to check if the EEPROM has reasonable values, but I can't find a range check for the MASTER_CAL. What is an appropriate range of values for MASTER_CAL?
73,
Mark
Mark Erbaugh