ojnihs Posted January 12, 2008 Report Share Posted January 12, 2008 Can we have pictures of your shoes? i got too many shoes to take pictures of Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 12, 2008 Report Share Posted January 12, 2008 Can't say I see anything particularly wrong with that. But if it's shocking you with any regularity I'd get it looked at before using it again. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 12, 2008 Report Share Posted January 12, 2008 Can't say I see anything particularly wrong with that. But if it's shocking you with any regularity I'd get it looked at before using it again. thanks Nate. i feel like it's something with the case, cause the last time it got me was when i was reaching for the rca plugs and the first time was when i picked the damn thing up. needless to say, i've got the thing unplugged because i'm not using the damned thing until i figure this out. Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 12, 2008 Report Share Posted January 12, 2008 thanks Nate. i feel like it's something with the case, cause the last time it got me was when i was reaching for the rca plugs and the first time was when i picked the damn thing up. needless to say, i've got the thing unplugged because i'm not using the damned thing until i figure this out. The way that I see it is that assuming the DAC is wired properly it's likely that the case is tied to safety ground (the ground at the IEC). If your outlet is ungrounded then safety ground floats and the chassis carries whatever voltage is present. When you touch the case you're becoming the path to ground. I can't remember if you've already figured out if the outlet you're using is grounded but if it is then something really weird is going on. It's also weird that there would be any voltage present at the ground unless there was a short of some kind and that could be either on the AC or DC side of things. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 12, 2008 Report Share Posted January 12, 2008 thanks again Nate. i still have to go to home depot and get a ground tester to see if the outlet is grounded or not. i'm just assuming that it is because none of the other things i got plugged into the surge protector seem to be having any problems (at least as far as i know). [img width=150 height=113 alt=IMG_1028]http://www.head-case.org/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=1222&g2_serialNumber=2&g2_GALLERYSID=73892946cb40113cd54981a19b7218aa that's where the two grounded wires are connected to the case. i'll get a ground tester today and check it out. thanks again. Quote Link to comment Share on other sites More sharing options...
grawk Posted January 12, 2008 Author Report Share Posted January 12, 2008 thanks again Nate. i still have to go to home depot and get a ground tester to see if the outlet is grounded or not. i'm just assuming that it is because none of the other things i got plugged into the surge protector seem to be having any problems (at least as far as i know). that's where the two grounded wires are connected to the case. i'll get a ground tester today and check it out. thanks again. Most things don't actually need to be grounded. I had a bass amp once that had a similar problem, and every time I'd touch a string, I'd get a tingle. That was exciting Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 12, 2008 Report Share Posted January 12, 2008 Most things don't actually need to be grounded. I had a bass amp once that had a similar problem, and every time I'd touch a string, I'd get a tingle. That was exciting damn that must have been weird. haha. Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted January 13, 2008 Report Share Posted January 13, 2008 Most things don't actually need to be grounded. I had a bass amp once that had a similar problem, and every time I'd touch a string, I'd get a tingle. That was exciting How did that affect your playing? Did you play faster? "Ooh, man, there's definitely a connection here, I can feel the electricity." Quote Link to comment Share on other sites More sharing options...
grawk Posted January 13, 2008 Author Report Share Posted January 13, 2008 How did that affect your playing? Did you play faster? I grounded the outlet Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 13, 2008 Report Share Posted January 13, 2008 well..i completely forgot that my surge protector has an indicator on it that shows if or if not the outlet is grounded. indeed my outlet is grounded, so there's probably a short somewhere. anyone want to tell me how to find it? Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 13, 2008 Report Share Posted January 13, 2008 well..i completely forgot that my surge protector has an indicator on it that shows if or if not the outlet is grounded. indeed my outlet is grounded, so there's probably a short somewhere. anyone want to tell me how to find it? First place I would look is by the AC power switch. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 13, 2008 Report Share Posted January 13, 2008 wow i have no idea what i'm doing Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 13, 2008 Report Share Posted January 13, 2008 is there any possibility that my radioshack power cable is the problem here? Quote Link to comment Share on other sites More sharing options...
Pars Posted January 13, 2008 Report Share Posted January 13, 2008 Probably not the power cable, though that should be an easy check... you have a meter (DMM)? If so, unplug the unit and with the DMM, set to ohms scale, check between the hot and ground and neutral and ground pins on the input AC connector with the switch off. Then try it with the power switch on (still unplugged ). You shouldn't see anything between hot and ground with the switch off. Neutral and ground, not sure... depends on how the chassis is tied to ground I think. With the switch on, you probably won't see anything either, other than maybe the transformer primaries. I would think if you had a short from hot to ground (chassis?), the fuse would blow... Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 13, 2008 Report Share Posted January 13, 2008 so i had someone with an ee background take a look at it and he said that everything seems fine. used a multimeter on it as well and said it was fine, although i thought the multimeter said SHRT on it, not sure if that means short or not, but i'm going to assume that's what SHRT means? Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 13, 2008 Report Share Posted January 13, 2008 is there any possibility that my radioshack power cable is the problem here? If the ground pin is somehow lifted it might be possible for it to be part of the problem. I still don't understand why you've got voltage on the chassis to start with though. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 14, 2008 Report Share Posted January 14, 2008 god this is bugging the shit out of me, the case is grounded, so it shouldn't be causing this voltage issue. if i remember correctly, i never touched the case the second time i got shocked, just the interconnect. fuck fuck fuck. Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted January 14, 2008 Report Share Posted January 14, 2008 Well, when you use a multimeter checking the ohmage of something, and you touch two ends of a cable that are the same piece of wire, it should say short. When you touch two different wires, it'll say some ridiculously high impedance. That's what it should do. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 14, 2008 Report Share Posted January 14, 2008 Well, when you use a multimeter checking the ohmage of something, and you touch two ends of a cable that are the same piece of wire, it should say short. When you touch two different wires, it'll say some ridiculously high impedance. That's what it should do. it wasn't two sides of the same cable, it was the grounded point in the case and one of the points on the outlet input Quote Link to comment Share on other sites More sharing options...
Pars Posted January 14, 2008 Report Share Posted January 14, 2008 it wasn't two sides of the same cable, it was the grounded point in the case and one of the points on the outlet input If the ground pin on the IEC connector is connected directly to the case, then this is correct (very common configuration). The point of this is safety... if something in the transformer/PSU/AC connection were to come in contact with the case, the case will short it back to the ground in the power cable. Should also blow the fuse as well. If your friend could check AC voltage between the ground point on the case and a wall outlet ground, that would tell you if you have any AC on the case. You said you got shocked again just from the interconnect? What does this interconnect go to? It might not be the DAC or whatever it is that you are checking now... could be another piece of equipment causing it. Many components have the interconnect grounds connected to the chassis as well. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 14, 2008 Report Share Posted January 14, 2008 You said you got shocked again just from the interconnect? What does this interconnect go to? It might not be the DAC or whatever it is that you are checking now... could be another piece of equipment causing it. Many components have the interconnect grounds connected to the chassis as well. well the second time i got shocked was when i touched the interconnect to pull it from the dac-ah. so i just grabbed the connector, not the case at all. i was thinking that the current may be coming from the lunchbox because it uses a two prong power cable. *shrug* Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 14, 2008 Report Share Posted January 14, 2008 well the second time i got shocked was when i touched the interconnect to pull it from the dac-ah. so i just grabbed the connector, not the case at all. i was thinking that the current may be coming from the lunchbox because it uses a two prong power cable. *shrug* Dude, that's f'ed up. Quote Link to comment Share on other sites More sharing options...
ojnihs Posted January 14, 2008 Report Share Posted January 14, 2008 Dude, that's f'ed up. Quote Link to comment Share on other sites More sharing options...
Pars Posted January 14, 2008 Report Share Posted January 14, 2008 Tube shit and 2-prong power cables reminds me of the image Reks posted: Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 14, 2008 Report Share Posted January 14, 2008 I can't think of a good way for you to test if the amp is the issue without potentially shocking yourself again so I'm hesitant to offer more advice right now... Quote Link to comment Share on other sites More sharing options...
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