Monthly Archives: August 2013

SCAF audio amp circuit board

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[Thursday: 5 miles.  Today: 18 miles]

I got my SCAF audio amp circuit laid out with Eagle CAD, created the circuit board, etched and drilled.  Most of the parts are installed.

The default trace size in Eagle CAD is itty-bitty, way too small.  I doubled the size.  But my drill bit still obliterates too much of the component mounting holes.  Drill too big, pads too small.

There’s no reason to use small traces in this circuit.  I should have gone with something much bigger.

But, that board is nearly done.  I still have a power supply board and the actual SCAF board.  The board I made was just for post-filter audio amplification!

Ok.  So maybe I’ll get the next one right.  Last time I used Eagle CAD and made circuit boards was on my GPSDO, about what, two years ago?  And I ended up doing a couple of those over, with bigger traces!  Duh.

traces too small

Filed under Ham Radio
Aug 31, 2013
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