Jacques: See my note about stabilizing the FT1000MP oscillator [same for FT1000MP MkV I think]. www.k0to.us/HAM/FT1000MP/Temperature%20Stabilized%20FT1000MP%20REF%20oscilla tor_files/Temperature%20Stabilized%20FT1000MP%20REF%20oscillator.htm Tod, K0TO