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Tested the box today, and despite some power plug problems (I was powering it off a dew heater controller via an RCA cable - which was thin, heated up, and the controller power plug kept pushing out of the battery box (spring loaded); despite the power problems I manage to get the internal air temp down to 7.3C, while outside air temp was 23.9C, so Delta T of 16.6 C.
My new dedicated power supply should arrive tomorrow and I will try again. I believe a delta T of around 16C is near the average for these boxes. The sensor was hanging in mid air inside the box so it's an air temp. I am using a digitial temperature controller, the OPEGG WTS-3A016.
I need to address the box insultation gaps, particularly around the TEC end. The insulation is just 20mm closed cell foam that came as packing for one of my scopes so I should be able to do better.
Is there a cooler box delta T record for the single TEC versions made here? Would be nice to know the limit.
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