Quote:
Originally Posted by jeyurkon
The only thing I wonder about is if the material matters.
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I have wondered that, too. From what I recall offhand, I have TVs with both steel and aluminum HV covers. Those with aluminum covers are 7-inch sets with RF type supply, Motorola VT-73 and National TV-7. Those with steel covers have flyback type supplies and higher HV. Of course, maybe the cheap little TVs used aluminum simply because they're cheap little TVs. Or, possibly I'm remembering wrong and there is no real pattern.
Similar question with ventilated vs. non-ventilated covers. Perhaps they should all be ventilated, but some are not because non-perforated sheet metal was cheaper. Judging by the melted wax I've seen dripping out of flybacks, some of those covers definitely could have used better ventilation.
No answers, in short, just more questions
If you had steel & aluminum containers about the right size, you could do an experiment by holding each type of can over the supply and seeing whether the RFI is different.
Phil Nelson