There is an established ramp up and ramp down procedure for tubes - different for glass and for metal tubes. Our controller allows up to 64 time/temperature periods. We have documentation from Hawkeye and RACS for this.
I'm not sure having a tube in the oven will make much difference. The oven is about 20 cu ft. A typical 12 inch CRT has a volume of about 1.3 cu ft, while a 21 inch color tube (the largest we will do) is about 5 cu ft.
Our production will be very limited - probably one a day at most.
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