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  DSC04811.JPG - The PNP type 2N1305 and NPN type 2N1304 transistors are the main switching transistors used in the calculator. Datasheets are  here  and  here .  
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The PNP type 2N1305 and NPN type 2N1304 transistors are the main switching transistors used in the calculator. Datasheets are here and here. Download
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