R.G. Keen's hum free ABY has been a permanent fixture on my board since I built my first one 11? years ago. Thought I should update it to give me as many possible configurations as I could while honing my newfound skills? with KiCad.

Apart from the ABY, this one adds

• Phase reversal switch which can be mounted either side of the board or on a ribbon cable (depending on enclosure)
• Direct out which is configurable Always on/Switched with output A
• ABY switching can be left off to give a splitter with 2 isolated outputs - or more by linking the direct out to the input of another unit

Board arrived this morning, fully working as expected 

Gery nice work! Congrats!

That's a very nice looking board, Kevin. 

Nice touch with the silkscreen on the traces so you can actually see them in the black solder mask.  White solder mask is just as bad as black in that regard too, maybe even worse.  Nice looking board!!!

Thanks guys. Embarrassingly, this is attempt 5 - a mixture of inaccurate footprint creation and a lot of feature creep.

What looks like silkscreen on the traces is just light reflection. I'm finding that useful with gloss black boards

Quote from: stallik on March 20, 2025, 06:59:33 AMEmbarrassingly, this is attempt 5

Don't worry.  I don't think anyone heard you say that. 

Feature creep? Never heard of it.

Nice job.