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Originally Posted by iareConfusE  Awesome, can't wait til production boards are available. Also, is the new BOM up somewhere? I checked diyforums.org and the SS page was still in "coming soon" status.
Also, silly question(s) but, I'm assuming those two circles above and between C3 and C5 are for LEDs, which way do they go in though? I can't see any marking or symbol for which side positive/neg should go in. Also, can the LED's be wired to run under the tubes for a colored glow? Is that what the hole in the center of the tube is for?
EDIT: nvm I looked on my PCB tube sockets and noticed that the center hole was plugged. So, how do I go about lighting up these tubes with LEDs? Would I just run the LED's by wire somewhere nearby the underside of the tube? or is there a better approach to this?
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BOM is in work - sorry, it's been a bad week at work.
As for the tube sockets, this will tell you all you need to know (they're all 7-pin sockets):
Millett Hybrid MiniMAX Tube Lights
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Originally Posted by ludoo I assume the LED positive legs go towards RLED.  |
Exactly. The SSMH is negatively grounded, so the side of the LED that has a trace going to it is positive. We'll put "+" signs there for the production boards, though.
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Originally Posted by zkool448
Quick question regarding the sockets once soldered to the pcb. When the pcb is mounted in the case (upside down) how much clearance is there between the pcb and the top lid of chassis? Will the sockets protrude above or remain below the lid?
Just wondering for cosmetics purpose when it's time to size the holes on the top side if need to make clearance for the tubes dia or only for the sockets. thanks -zk
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I certainly wouldn't cut it that close. The PCB socket diameter is so close to the diameter of the tubes, the difference is not worth worrying about.
EDIT2: Never mind about the bushings - there isn't enough clearance - it's a tiny bit more than a 1/4". So, yes - the tube sockets will stick above the holes. It's best to probably still cut the 3/4" hole, though.
EDIT3: A standard Millett MAX's sockets stick about 0.54" above the surface of the PCB, but this will vary depending on how hard you squish down the socket when you solder it (I squish very hard.) Accounting for the thickness of the plate, about 0.21" of the socket will be above the surface of the top plate (using the Hammond "L" case). Note that the typical PCB 7-pin ceramic socket is 0.725" in diameter. The typical 19J6 tube is about 0.715" in diameter.
Make the hole 3/4".
