My T-4X quit working today, the 250V supply was gone. Filament, bias, and 650V supply normal. On investigating the AC-4R board in the AC-4, found two parallel 5W 200ohm metal oxide resistors in the 250V supply circuit OPEN. Suspected a shorted capacitor, but the cap is not shorted. Anyone else experience similar behavior? 73 Curt KB5JO
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