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Old 7th Jun 2021, 9:58 pm   #47
newlite4
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Join Date: Nov 2003
Location: Bath, Somerset, UK.
Posts: 1,806
Default Re: Vintage sears Silvertone radio safety question

The heater chain really is just like a set of Christmas tree lights but with a resistor at one end. What you need to do is to carefully remove each valve in turn and test between pins 2 and 7. Using an ohmmeter on the X1 range just check for continuity to establish that each heater is intact.
Neil
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