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Old 16th Jun 2021, 2:37 pm   #18
mole42uk
Nonode
 
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Join Date: Aug 2010
Location: Resolven, Wales; and Bristol, England
Posts: 2,614
Default Re: Cooler recifier diodes?

Yes, you are right, the design has far too much heat generation per unit of dissipation. A fan would help but this is a music synthesiser so quiet is better than cooler.

I have ordered 105ยบ capacitors and several new 1N5401 which will be installed 20mm above the PCB - that's all the space that is available!

Of course, the next problem will be that all the power is delivered to the processor board through a 10-way ribbon cable, the connector is visible on the photo. Perfectly adequate for logic-level signals but this one carries +12V, +5V, +3.3V, -5V, -12V as well as the ground connections....
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