Thursday, April 14, 2022

Preemptive purchases to continue repair of IBM 1130 +6V supply

FOUND AND PURCHASED SOME ORIGINAL 108 TRANSISTORS FROM EBAY

Two different providers had multiple of the Motorola manufactured 108 transistors. These are high current Germanium PNP transistors that IBM used in all of their SMS and many of their SLT power supplies. One of the suppliers could deliver four in just a few days, which should be sufficient to handle any failed transistors in the +6V supply. 

CIRCUIT BREAKER ORDERED JUST IN CASE IT NEEDS REPLACEMENT

I found a small breaker that I can wire in to the supply replacing the existing switch type breaker, in case the breaker itself is the issue causing the supply to trip out. I should have it by the weekend.

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