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Measure the DC voltages on Q522. There should not be more than about 0.22 volts difference between the emitter and base. If so, the transistor is bad.
If in doubt, measure the base while moving the dial from end to end. If no change, the oscillator is not running. The collector will always measure 0 volts in that circuit since it;s grounded through the oscillator coil.
If the RF or mixer transistor were bad, you would likely hear some strong, nearby station.
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