Thanks Oz, yes the world is full of strange folk........
Sorry, the concept of me walking behind a man with a red flag, "the protagonist", and doing what he tells me to do, especially without hard proof ......... nope, the World moves constantly forwards..........
Okay......Still on the New Power Board, tracks masks finished, quadruple checked. But will check again.
Doing the mask for the component outlines, values & numbering and heatsink position etc. I will do this mask in a light colour so you can scan from, nothing to see if I do it in white......
I will put the resistor values on each, it helps with assembly I think. Also I will tin all the copper as might need to do some extra stuff.
Track pads are a size that gives a good solder joint both sides, but not to big or to close to cause problems.
Nothing worse than drilling a board and finding the pads coming away, because the pad is small and the adhesion is weak. The drill always pushes if blunt, and tears if too sharp. Copper/ brass... reduce the rake angle on the cutting faces of the drill.
The board is now finished at 282mm long.
Heat sinks for this board.
http://www.aliexpress.com/store/product/160-80-26-9MM-high-quality-aluminum-heat-board-electronic-radiator/1522105_32482586868.htmlThese seem a reasonable price, and several folk stock these at this size. You will need 4off, 2 will need joining end to end for a single 266mm long. Each of the 4 is 160mm long, 80mm high, and 26mm wide, so cut a bit off the 6mm thick excess and use that, only needs a 20mm strip and 4 small bolts/screws drilled and tapped.
The mounting bit for the FET's is 6mm thick, but the fins are more than PJ, but thinner, so the mounting holes on the New Power Board will probably need moving closer to the thicker bit, but I will asses when I get them here and alter the Board accordingly.
I note MaryB mentioning that more copper can alter Inductance, so I have kept track ways etc, pretty much the width of the original within reason, although some PJ's are scary.
That big muddy red cap in the middle is ordered at 4.7uf, although on the original it was 1uf.
Give me a few days yet, (I have other jobs on now the weather is getting better, ha ha), and I will post on Fieldines, I can achieve 512k image size there.
Unless...... some Mod here can give me an email address, then they can have the 4off masks, each at 600dpi 2meg, Jpg or PDF, and post them for us on this site.?