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td75, When I look at the heatsink then Q10 I see: Heatsink --> A transparent plastic sticker --> Thermal compound --> Q10 Therefore I think that Q10 should be insulated from the heatsink. I hope this helps!

Good evening, Sorry with the questions but could somebody please tell me if this would be a suitable replacement for C1? http://tinyurl.com/ndzup92 It's a 3.9uf 250v axial capacitor. It looks the same as a capacitor on the analog board of my SE/30. RS Components want to charge a fortune for...

Good evening, I have sourced most of the replacement capacitors but I am not sure about the following ones: 10uf 160v, 470uf 10v *2 and 100uf 200v*4. Is there anything special about the 10uf 160v and 470uf 10v caps? Low ESR etc. Their different colour jacket makes me think this. Could I...

Good Afternoon, I've just encountered a minor setback in receiving my replacement '2SC3260'. The seller refunded my PayPal payment saying that he had none in stock even though 37 or so of them were in stock when I bought the item! So be carefull if you want to buy your replacement '2SC3260'...

td75, On behalf of your recommendations I bought the '2SC3260' on Ebay this morning; it will be coming from Taiwan. I will report back when it arrives. Thanks for the help! The other component that failed was a RIFA 40/085/56 GPC metallised film capacitor. I think the board reference is C37...

Hello James, I am in agreement with you that the failed component at Q10 is indeed a '2SC3260' from the power supply. Would you have any recommendations for a replacement part that would be available online? Would any power transistor with the same values do? Thank you

Thank you for your response nvdeynde! Using the information you've provided I am trying to find a suitable replacement. On Ebay i've found the following listing: http://tinyurl.com/qz75vxy Its specifications match up with ones given in the datasheet: 0.8A, 30V and a TO 92 package. Would...

Good morning all, I am currently working on the restoration of a Macintosh 128k. After replacing a 1.6A 250V fuse (which was not present when I opened the Mac up) on the analog board I switched on the Macintosh to be confronted with a cloud of smoke! I have narrowed down the problem to two...