Fridge at base temperature of 34 mK, but Old Tower Thermometer reads high! (124 mK). New Rox thermometer keeps reading infinity.
During IbIs measurements, donot see transitions. Investigated to find out shorts to chassis on two Cables. These shorts can warm up the Tower to keep phonon channels normal.
Shorts were not present at 77K electrical checks.
With only one cable with no shorts, tried to check if we can see transitions. But still no transition.
Tower temperature didnt decrease with connecting only one Cable. Both these suggest there might be some thermal touch in between the stages (Matt pointed out). Not sure where since Coldplate and Still reads similar values as last two runs.
Plan going forward will be to warmup and open each stage to look for possible thermal touch.
Fridge temperature remain stable during this time which suggest temperature spikes issue has been solved.