audio ground hum on tv thru Directv receiver - Audio/Video Chat

Author	All Replies
ArthurS Watch Those Blinking Lights Premium join:2000-10-28 Hamilton, ON	reply to datguy11 Re: audio ground hum on tv thru Directv receiver Those adapters are intended to make a ground connection where there isn't any ground available, not to lift the ground! Yes, those ground lift adapters are great for troubleshooting ground problems, and even then I'm extra careful using them, and only on a very temporary basis. In some jurisdictions, the (mis)use of those ground lift adapters is against code and represents a safety issue. I'd look at fixing the AC outlet so it's grounded properly! Usually ground hum problems are exasperated by poor receptacle grounds, due to the poor/cheap design of modern electronics.
	to forum · permalink · 2012-01-21 16:03:45 ·

NJxxxJon DSLR'er from the 56k days. Premium join:2005-10-22 00000 Reviews: ·Verizon FiOS	reply to datguy11 said by datguy11 : PROBLEM SOLVED (for now) Someone I work with mentioned that the ground leg on some TVs can cause problems (he said some A/V installers will break off the ground leg on tv cords), so I isolated it using this adapter that and therby breaking the ground connection. TO answer previous questions, I do not have cable modem , I have DSL, and although I now have a hub behind my TV and a cat 5 that connects to my router on the second floor- the hum was there before I had restructured my tv area. I didnt "fix" the problem, but I accomplished getting rid of the hum, Im not sure why it only affected my directv DVR box and not my kids Wii, Xbox360, blu ray player, etc etc The ONLY thing I can think of is this: My house built in 1950 has a lot of the original electric wire, which is a cotton covered Hot and Neutral only ran inside metal conduit (by code, all electric in NYC is inside conduit) Anyway, years ago I bought a surge protector power strip that also protects phone and coax ( and I did try bypassing the coax in and out on the power strip).. The power strips has lights on it, green means wiring is good and red means wiring is bad (not protected).. Basically it didnt detect a ground.. SO what I did is attatch a wire to the ground lead on the electric out and attach it to the metal box of the elec. receptacle. The reason being is that years back, the metal conduit and boxes were considered the "ground" and no ground wire was ran. I suspect maybe this has something to do with it? It could be a "dirty ground"? Or maybe b/c other parts of my house were upgraded with 3 wire electric cable that has a seperate ground wire.. who knows I just checked my directv box and it does have the 3 prong plug, that and the tv are the only devices with the ground leg.. So it has something to do with the "grounding"... Could I do this technique for my audio receiver? Using regular speaker wire......... -- I ... I........, I have been on here for years now. Treat me nice dammit.
	to forum · permalink · 2012-01-21 18:09:17 ·
cOOLguy join:2009-09-10 Torrington, CT	reply to datguy11 OMG this is too much, keep cutting wires to get rid of hum while putting everyone in the household in danger, when there is a solution for less than $20. You can end up killing someone or burning down your house. The ground pin that you lifted serves to channel any fault current to safe place without creating a risk of electrocution or fire. Fault current comes from components which have failed, especially after a surge on the line from lightning or switching transients. By removing that connection you may even blow out other devices connected to the TV (if you live long enough.)
	to forum · permalink · 2012-01-23 12:20:55 ·
printscreen join:2003-11-01 Juana Diaz, PR	There are so many components that will fail before this happens...
	to forum · permalink · 2012-01-23 12:30:09 ·
cOOLguy join:2009-09-10 Torrington, CT	said by printscreen: There are so many components that will fail before this happens... Yah, just one component needs to fail, not counting other issues such as a plumbing leak, rain blowing in through the window, dust and dirt buildup around line voltage conductors. Are you going to argue about why an electrical grounding pin is provided? Are you going to be that silly?
	to forum · permalink · 2012-01-24 02:46:57 ·
IllIlIlllIll EliteData Premium join:2003-07-06 Lindenhurst, NY kudos:7	said by cOOLguy: said by printscreen: There are so many components that will fail before this happens... Yah, just one component needs to fail, not counting other issues such as a plumbing leak, rain blowing in through the window, dust and dirt buildup around line voltage conductors. Are you going to argue about why an electrical grounding pin is provided? Are you going to be that silly? no argument here, but there are many many very old households in the United States that have antiquated electrical systems and antiquated electrical outlets that do not have a ground plug with those households having connected electrical and electronic equipment in the same manner as the OP had connected, without the use of the ground terminal for many many years without any issues. and then there is the electronic and electrical equipment not designed with a ground plug that still has the potential to be energized if the electrical outlet or wiring to the electrical outlet is wired incorrectly. -- Suffolk County NY Police Feed - »www.scpdny.com PS3 Gaming Feed - »www.livestream.com/elitedata
	to forum · permalink · 2012-01-24 09:10:23 ·
printscreen join:2003-11-01 Juana Diaz, PR Reviews: ·Choice Cable TV ·Coqui/PRTC	said by IllIlIlllIll: no argument here, but there are many many very old households in the United States that have antiquated electrical systems and antiquated electrical outlets that do not have a ground plug with those households having connected electrical and electronic equipment in the same manner as the OP had connected, without the use of the ground terminal for many many years without any issues. and then there is the electronic and electrical equipment not designed with a ground plug that still has the potential to be energized if the electrical outlet or wiring to the electrical outlet is wired incorrectly. That's exactly my point. While there are some risks involved, it is not like it will cause the whole thing to blow up just because it is missing the ground pin. Modern electronics operate mostly DC at low voltages and a power supply will blow up with open capacitors or blown fuses if anything goes wrong.
	to forum · permalink · 2012-01-24 09:29:02 ·
IllIlIlllIll EliteData Premium join:2003-07-06 Lindenhurst, NY kudos:7	said by printscreen: said by IllIlIlllIll: no argument here, but there are many many very old households in the United States that have antiquated electrical systems and antiquated electrical outlets that do not have a ground plug with those households having connected electrical and electronic equipment in the same manner as the OP had connected, without the use of the ground terminal for many many years without any issues. and then there is the electronic and electrical equipment not designed with a ground plug that still has the potential to be energized if the electrical outlet or wiring to the electrical outlet is wired incorrectly. That's exactly my point. While there are some risks involved, it is not like it will cause the whole thing to blow up just because it is missing the ground pin. Modern electronics operate mostly DC at low voltages and a power supply will blow up with open capacitors or blown fuses if anything goes wrong. in fact, ive seen issues where the house ground becomes poor (the copper rod in the ground or to a water pipe) and an incoming cable line either becomes the ground for the household introducing a live potential or the incoming cable line is poorly grounded itself, having above ground potential and passing this potential through a device such as a tv, to the ground plug in the electrical receptacle. i cannot honestly say i have ever seen an incoming cable line grounded exactly in line with the household ground at "zero". -- Suffolk County NY Police Feed - »www.scpdny.com PS3 Gaming Feed - »www.livestream.com/elitedata
	to forum · permalink · 2012-01-24 10:56:52 ·
SmokChsr Who let the magic smoke out? Premium join:2006-03-17 Saint Augustine, FL Reviews: ·Clearwire Wireless	reply to datguy11 The other option that may (or may not) have helped would be to ground the DTV receiver to that outlet. Otherwise ground isolation adapters on the RCA cords would likely fix it. As far as lifting the ground on the TV, I'd be more concerned about damage from lightning than anything else.
	to forum · permalink · 2012-01-24 22:14:46 ·
IllIlIlllIll EliteData Premium join:2003-07-06 Lindenhurst, NY kudos:7	exactly what i was going to mention also.
	to forum · permalink · 2012-01-24 22:28:58 ·
datguy11 @verizon.net	Maybe I will lift the ground to the receiver,, it is plugged into a surge protector that also protects the coax.. The tv is plugged straight in with no surge protection
	to forum · permalink · 2012-01-25 07:05:18 ·
SmokChsr Who let the magic smoke out? Premium join:2006-03-17 Saint Augustine, FL Reviews: ·Clearwire Wireless	said by datguy11 : Maybe I will lift the ground to the receiver,, it is plugged into a surge protector that also protects the coax.. Lets look at why you get a hum. It's because the ground potential of your TV is different than that of your satellite receiver, which causes current to flow on the audio cable. That current is heard as the hum. Now to correct it you have two choices, block the current from running the cable, or get both units at the same ground potential. By opening the ground to the TV you've allowed it to float to the same potential as the DTV box. That confirms that the DTV receiver is not at the same ground as the house electrical ground. For your best protection against lightning and other surges, everything should be at the same ground. That's why I recommended grounding the DTV to the outlet ground. Still something is not quite right, if the surge protector/UPS is plugged into the same outlet, and that is also protecting the coax, then the DTV receiver should have been at the same ground. It would take some hands on checking to see why you are getting a ground shift there.
	to forum · permalink · 2012-01-26 02:19:36 ·
videonex join:2001-07-22 Reviews: ·VOIPo	reply to datguy11 Your AC cheater adaptor is the perfect device to prove what the problem is and you have done that. I have recommended that type of test for decades. I have always warned not to leave it that way. I have similar problems myself all the time with all of the grounded power lines and common audio grounds running around my place. The best solution is one of these: »www.amazon.com/Raptor-GL15-Groun···2&sr=1-5 Just an example, but there are many that do the same thing with different connections. Just find the one that fits your situation physically and you'll be god to go. One poster warned of audio quality being affected, true but so minimal it isn't worth trying to explain.
	to forum · permalink · 2012-01-26 23:27:00 ·
printscreen join:2003-11-01 Juana Diaz, PR	I am not familiar with this device but this is also an alternative. »www.amazon.com/Ebtech-Hum-Voltag···cr_p_t_1
	to forum · permalink · 2012-01-27 11:00:28 ·
ArthurS Watch Those Blinking Lights Premium join:2000-10-28 Hamilton, ON	reply to datguy11 Nothing but the best out there: »www.jensen-transformers.com/ci2rr.html If this can't take care of a ground noise issue, nothing can.
	to forum · permalink · 2012-01-27 11:30:02 ·
SmokChsr Who let the magic smoke out? Premium join:2006-03-17 Saint Augustine, FL Reviews: ·Clearwire Wireless	said by ArthurS: If this can't take care of a ground noise issue, nothing can. That will stop the hummmmm.. Very nice device. But it won't correct the underlying trouble that caused the hum in the first place.
	to forum · permalink · 2012-01-29 06:46:46 ·
ArthurS Watch Those Blinking Lights Premium join:2000-10-28 Hamilton, ON	said by SmokChsr: said by ArthurS: If this can't take care of a ground noise issue, nothing can. That will stop the hummmmm.. Very nice device. But it won't correct the underlying trouble that caused the hum in the first place. Very good point, but there are situations where it will be more trouble/expense to correct the underlying cause than to treat the symptom. This is where products from Jensen work well, and I'm sure in this situation I would prefer using an isolation transformer than to defeat the safety ground of a device if I had a choice between the two.
	to forum · permalink · 2012-01-29 14:36:50 ·
printscreen join:2003-11-01 Juana Diaz, PR Reviews: ·Choice Cable TV ·Coqui/PRTC	reply to SmokChsr said by SmokChsr: said by ArthurS: If this can't take care of a ground noise issue, nothing can. That will stop the hummmmm.. Very nice device. But it won't correct the underlying trouble that caused the hum in the first place. True. The ground loop will still be there. And it won't solve hum bars that may be present in video which not everybody associates with being the same problem as a ground hum.
	to forum · permalink · 2012-01-29 19:05:37 ·
ArthurS Watch Those Blinking Lights Premium join:2000-10-28 Hamilton, ON	said by printscreen: And it won't solve hum bars that may be present in video which not everybody associates with being the same problem as a ground hum. And for that you have video isolators! Very spendy yes, but a quick and easy fix. Jensen and Allen Avionics makes some really nice models. At that point, i might be cheaper to fix the power problem even if it involves rewiring the receptacle.
	to forum · permalink · 2012-01-29 19:32:36 ·

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Re: audio ground hum on tv thru Directv receiver