I have never owned an older rig that had the option of purchasing a TCXO alignment addition, or drifted. I now have a used TS480SAT, and I've noticed that this morning it is off frequency by .11 on 15m, 17m, and off by about .08 on 20m and .04 on 40m. Is this normal operation on a rig that does not have a TCXO module installed -- is this a small amount of drift, or just out of alignment somehow? Does this change as it warms up? I didn't notice this behavior last night. Is there likely a problem with this used rig, or is this normal? This is the 2nd day using the radio.