Tools, Equipment & Components TO-39 Heat Sink Previous500 Mixed Components NextCA3081 - Used on Bally Solenoid driver board (and others) TO-39 Heat Sink TO-39 Heat Sink £2.00 Aluminium heat sink for metal transistor. Quantity: Add To Cart Facebook0 You Might Also Like 2n3440 - Bally high voltage section £2.50 500 Mixed Components £5.00 CA3081 - Used on Bally Solenoid driver board (and others) £2.50