Based on the circuit shown by Papa at the BAF 2023, I have built the F5m using easily modified DIYAudio Store F5 boards from long ago. I installed the boards on my prototyping chassis configured to handle the FirstWatt standard +/-24V power and a subset of the Universal Mounting Spec heatsink holes.
Since my heatsinks are fairly large (7" tall Heatsink USA 10.080" wide C/W/3": approximately .80), I biased the output FETs at around 1.35A, giving a heatsink temperature rise of 23C.
The...
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Since my heatsinks are fairly large (7" tall Heatsink USA 10.080" wide C/W/3": approximately .80), I biased the output FETs at around 1.35A, giving a heatsink temperature rise of 23C.
The...
Read more