its a test to determine RF air borne or mains carried hence a battery powered radio. do you have a friend w/ a car parked nearby?
most good HF receivers have provisions to run on 12V too.
sheesh you'd never survive a zombie apocalypse.> take a test too, haha http://www.nerdtests.com/mq/uttake.php?id=58400
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Actually I have quite an extensive bug out bag 🙂 Many ways to start fire, tinder, tarp, knives, saw, rope, twine, water filtration, ham radio, solar charger, wool blankets, medical roll, and about a million other things 🙂
Since I mentioned it earlier in this thread, here is the breadboard spring vise I printed out.. have two more jaws to print still for the other half of the board's sides.
Awesome, any way to get those with integrated switch and fuse as well? I have an IEC with power connector, switch and fuse right now.
Here are a few integrated units, I think they use a rectangular mounting hole.
06A2D Delta Electronics | Mouser
06AN2 Delta Electronics | Mouser
06A2 Delta Electronics | Mouser
Since the cases would be plastic, wouldn't it be okay to just put a jack in the back of each case as a connection point for the transformer? i.e. have one box that has the transformer and the other box would have the dc power supply board and chip amps. They'd be sitting right next to each other. Can't see how this would hurt anything. That way I wouldn't have to bolt them together and it'd look nice I think.
FWIW I would *not* make a chassis out of plastic ... and even less the printed variety because of the very construction technique it uses: applying tiny drops of molten plastic over already cold one; that alone creates a discontinuity at the contact surface, and I'm talking a strength/stress discontinuity, even if material is seen as a continuous void free solid mass, simply the "heat treatment" is different on both sides.
I mean, I would use printed plastic any day of the week for something like this:
or this:
but never for this:
but hey, it's your toy, play with it as you wish 🙂
And as they say: "for the guy with a hammer, every problem looks like a nail" 😉
I mean, I would use printed plastic any day of the week for something like this:
An externally hosted image should be here but it was not working when we last tested it.
or this:
but never for this:
but hey, it's your toy, play with it as you wish 🙂
And as they say: "for the guy with a hammer, every problem looks like a nail" 😉
buy the tool 1st, then look for the job . IDK seems backasswards
I have a tendency for tool fetishes too. I have to restrain myself.. oh my these 1st world problems
last night I spent time working on fixing a broken tool. I was successful because I had more tools.
I made myself a promise, cuz my dad never had the tools and any tools he did have were crappy.
I have a tendency for tool fetishes too. I have to restrain myself.. oh my these 1st world problems
last night I spent time working on fixing a broken tool. I was successful because I had more tools.
I made myself a promise, cuz my dad never had the tools and any tools he did have were crappy.
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Wow all the weird criticism. I already had jobs the printer would do before I bought it and it's doing them now, along with many other jobs I didn't think of. Just asking here if plastic was feasible for an amp enclosure, because it is something I have needed.
Like I said I use this 3d printer more than I do a laser printer and everyone has a laser printer (and/or inkjet) and isn't criticized for owning one lol.
Jen I misread the situation
sorry no bad intention here.
I don't own a smart phone or a lazer printer so ignore me.
sorry no bad intention here.
I don't own a smart phone or a lazer printer so ignore me.
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So I just connect the AC ground wire to the center of the transformer on the top at the bolt? Along with the purple wire and dc supply ground? how about the speaker wire ground too?
No only the AC safety ground. If there is a transformer insulation failure that should blow the fuse. There is no reason to connect the DC supply in anyway to the safety ground. The transformer will have an inter-layer insulator in addition to the winding's insulation. So you start off double insulated.
IIRC, you shouldn't separate the transformer from the rectifier/filter network. If you want to put the transformer in a separate enclosure, then put the entire power supply in the enclosure and connect to the amplifier via an umbilical. However, I'm not an expert on these things; I just recall reading this somewhere. Perhaps someone else with more knowledge can clarify.
Okay I was thinking it might cut down noise if dc power supply was grounded? I dunno.
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