First, trace the circuit to see if caps are in series or parallel. Series means less capacitance—you sum reciprocals—while parallel adds straight up, like stacking plates. Keep redrawing until it’s one value. Honestly, though, on these old radios, I’ve found the schematic is often wrong; you’ll measure one thing and the board tells another story. Last week, a supposed parallel pair in a vintage receiver was actually in series because some chap had botched a repair years ago—trust your eyes and meter more than the paper.
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