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Thursday, July 19, 2018

Beomaster 4400 (2419): Reservoir Capacitor Replacement and Transistors Remounted

Last night I installed the two new 0C8 & 0C9 10KuF reservoir capacitors. These are the capacitors for the Beomaster ±35V rail voltages.

The replacement capacitors are a little smaller in diameter and length but I found some 105°C Nichicon capacitors that still fit into the Beomaster 4400 mounting bracket.

I reattached the ±35V rail voltage wires using some small terminals.






















I added some heat shrink tubing for some added protection.






















Here is the completed reinstallation of the reservoir capacitors.






















Now I was able to resecure the main (PC5) board in the cabinet. I am using SilPads for the insulators and thermal exchange between the power transistors and the heat sinks.




































































This Beomaster is now ready for the reinstallation of the small boards.




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