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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Ohmess
Joined: 11 Sep 2008 Posts: 242 Location: Vienna, VA
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Ohmess
Joined: 11 Sep 2008 Posts: 242 Location: Vienna, VA
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Link Posted: Tue Nov 11, 2008 11:20 pm Post subject: |
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Dang. Missed that one. I'll keep watching.
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Ohmess
Joined: 11 Sep 2008 Posts: 242 Location: Vienna, VA
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Link Posted: Thu Nov 13, 2008 2:44 am Post subject: |
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Snagged one of those. Good suggestion. Thanks man.
I can probably get a couple of bucks for the surge protector I'm using now.
Gotta figure out how to get the sub onto it; its on the other side of the room.
Hope I get all this done for the Super Bowl!
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Ohmess
Joined: 11 Sep 2008 Posts: 242 Location: Vienna, VA
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Link Posted: Sat Nov 15, 2008 8:04 pm Post subject: |
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Yo Nashou66. I installed that puppy today, and fired up the amplifiers the improvement is amazing. All the hum/background noise etc. is gone. Between songs, dead silence. My theater gear has never sounded this good.
Thanks for the help.
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Link Posted: Sat Nov 15, 2008 8:27 pm Post subject: |
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Yeah it does make a difference, I was skeptical at first, but the hum I had was so annoying , And i knew that Adcom Preamps were known for a slight hum but was never sure if it was the Adcom or just bad power or a both. I actually also just grounded my satellite distribution box and switcher to the Isolation transformers ground I was using a line level iso in the coax till now and was losing bandwidth and channels as a result. Now its all good, and I can for sure hear the ever so slight inherent Adcom noise(this is going out of my system as soon as the new Outlaw Preamp is out ) I have just located the two breakers that go to my upstairs every day system and will be putting one in between those outlets too!!!
Athanasios
_________________ Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
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wallace123456
Joined: 14 Aug 2006 Posts: 2236 Location: Northwest VA area
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Link Posted: Sat Nov 15, 2008 9:44 pm Post subject: |
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At the risk of starting a "heated discussion" about AC power conditioners/isolation, has anyone used any of the iso units for the video portion of your home theater?
If so, any improvement?
wallace
_________________ Life Is Good, But BBQ Is Better! BBQ Competition Team
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Link Posted: Sat Nov 15, 2008 10:05 pm Post subject: |
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Mine powers my Whole theater, 5Kva's !!!! its rated at 41 amps which is more than enough. It does improve the picture better than those monster power supplies. Lets put it this way, before when My Air conditioner or Dishwashing machine would turn on or switch to different cycles(dishwasher) My PJ would do a quick flash, and it was on its own
circuit breaker in a separate sub panel box dedicated for the theater from one of my mains, I have two in my hose one on each end of the basement. And the Sub panel that is for the theater runs off the main box that is NOT feeding the dishwasher or the Central air, that is my second Breaker box. Even thought it was separated by two panel boxes the air and dishwasher caused that issue. Now I have no problems with brownouts, its a nice steady power flow. The Iso Xfrmr isolates the hot and neutrals from all the other circuits in the house, its like its own power company ,so to say, providing 5000 VA with a 41 amp current ability. Mine can also can take a full lighting strike to the main incoming power sources, from what I have read, and its output is not affected. Like bob says you can touch the hot and ground and not get zapped the way I have it set up.
Bob will be able to explain it much better as he used to install these in Hospitals. I love it, sure it was one heavy MOFO but it does the job and worth the 250 i paid for it and it has a -120db noise reduction, i did a search for the one i got and found out it goes for over 2g's new!!! this one powered an entire array of HP main frames for some military base.
I paid more for the Monster HTS2600 I have that weighs only 5Lbs compared to 150lbs, and now i have no Hum the Monster Power did Shite!!!!!
Athanasios
Athanasios
_________________ Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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wallace123456
Joined: 14 Aug 2006 Posts: 2236 Location: Northwest VA area
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Link Posted: Sat Nov 29, 2008 11:04 pm Post subject: |
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Athanasios,
Not sure if I missed something or not (normally, I do ), but do the iso units provide surge protection? I looked at the Hulda website, but still dont see anything about surge protection.
I ask because the last 3 years, we have had terrible A/C service (outages that sometimes will go off and on several times within a few minutes).
Are there re-set switches/buttons on the iso units?
Again, maybe I'm having a complete mental block, but have to ask.
wallace
_________________ Life Is Good, But BBQ Is Better! BBQ Competition Team
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Link Posted: Sat Nov 29, 2008 11:41 pm Post subject: |
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Yes, they can handle a lightning strike. That was one of the things I asked Bob about when i first started this thread. I also read it somewhere also.
A big one like mine i do believe is better than smaller units. I remember also that in some of Richard Grays Power station units were just isolation transformers and they stated that they handle lighting strikes as well. They are the same thing I have but just packaged and promoted for high end audio and cost a lot more.
Bob can answer this best.
Athanasios
_________________ Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Ohmess
Joined: 11 Sep 2008 Posts: 242 Location: Vienna, VA
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Link Posted: Sun Nov 30, 2008 2:55 pm Post subject: |
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wallace123456 wrote: | At the risk of starting a "heated discussion" about AC power conditioners/isolation, has anyone used any of the iso units for the video portion of your home theater?
If so, any improvement?
wallace |
I've read where lots of people say this makes no difference for video. On the other hand, the user manual that came with my Lumagen HDP that I use as a video processor states that it makes more difference with video than with audio.
Right now, my projector is in pieces, so I cannot mess with this. And, my projector is on another circuit than all the audio and source equipment. Before I button up everything and consider it done, I am planning to test the project hooked up to the isolation transformer. It likely will be several weeks before I can get to this.
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Boilermaker
Joined: 21 May 2006 Posts: 527
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Link Posted: Mon Dec 01, 2008 12:33 am Post subject: |
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Quote: | Not sure if I missed something or not (normally, I do ), but do the iso units provide surge protection? |
Wallace - There is no "surge" protection device as a part of an isolation transformer. There is, however, a single pole filter effect as the result of the windings of the transformer. Tear apart one of the "filters" available and you will find series inductors and parallel capacitors. The only difference is that the inductor in the filter is tiny in comparison to the transformer! If, for some reason, you feel the need to add any filters or over-voltage breakdown devices, make sure that you install them on the primary side of the isolation transformer or you lose some of the benefits of the transformer.
As to whether or not there could be a difference in video - It all depends on whether or not you have a problem - The isolating effect applies exactly the same for video as audio.
Video signals use coax cables that are designed to transport a signal from one device to another. If there are any ground loop issues at all, the ground current (along with all its noise and harmonic components) can use the video cable. You have just lowered the S/N ratio of your signal.
Even if you have leakage problems arise with a component, the transformer will block it.
There is no rocket science to a power isolation transformer and no matter how much it costs, there can be no functional difference between one made by Square D or one made by a hyper hi-end company!
Bob
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Link Posted: Mon Dec 01, 2008 1:38 am Post subject: |
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Boilermaker wrote: | Quote: | Not sure if I missed something or not (normally, I do ), but do the iso units provide surge protection? |
Wallace - There is no "surge" protection device as a part of an isolation transformer. There is, however, a single pole filter effect as the result of the windings of the transformer. Tear apart one of the "filters" available and you will find series inductors and parallel capacitors. The only difference is that the inductor in the filter is tiny in comparison to the transformer! If, for some reason, you feel the need to add any filters or over-voltage breakdown devices, make sure that you install them on the primary side of the isolation transformer or you lose some of the benefits of the transformer.
As to whether or not there could be a difference in video - It all depends on whether or not you have a problem - The isolating effect applies exactly the same for video as audio.
Video signals use coax cables that are designed to transport a signal from one device to another. If there are any ground loop issues at all, the ground current (along with all its noise and harmonic components) can use the video cable. You have just lowered the S/N ratio of your signal.
Even if you have leakage problems arise with a component, the transformer will block it.
There is no rocket science to a power isolation transformer and no matter how much it costs, there can be no functional difference between one made by Square D or one made by a hyper hi-end company!
Bob |
Bob Couldn't you add in the main panel box before the Isolation Transformer one of those in panel box surge arestors?
How do those work and where in the panel box should it be located or doesn't it matter?
Athanasios
_________________ Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Boilermaker
Joined: 21 May 2006 Posts: 527
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Link Posted: Mon Dec 01, 2008 3:22 pm Post subject: |
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Quote: | Bob Couldn't you add in the main panel box before the Isolation Transformer one of those in panel box surge arestors?
How do those work and where in the panel box should it be located or doesn't it matter? |
Athanasios,
They are usually an over-voltage device that has a decreasing resistance with increasing voltage. The concept is that as an overvoltage spike hits the power line it can travel to ground through the safety device and limit damage to other things. As you could imagine, if the power spike is high enough and of long enough duration, the safety device will itself fail, sometimes creating a fire. Therefore, the best place to put any of these devices is on your service entrance main panel. Just put them on a circuit breaker so that they are also protected.
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Boilermaker
Joined: 21 May 2006 Posts: 527
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Link Posted: Wed Dec 03, 2008 2:33 pm Post subject: |
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Athanasios - Actually this is a three phase transformer, so it would not be reasonable to use for our applications. The transformer was designed specifically for healthcare (operating rooms) as it has 208 volt primaries.
Thnks,
Bob
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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Boilermaker
Joined: 21 May 2006 Posts: 527
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Link Posted: Wed Dec 03, 2008 6:45 pm Post subject: |
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Quote: | Isn't it selectable to either 120 input or 208 input
and the same for the output just depending on how you wire it up?
Also its three connected so each could be used separately right? |
Athanasios,
Depending on how it is configured, yes you can feed it either 208 single phase or 120 single phase. The 208/120 distribution systems used in hospitals is three phase with 208 volts phase to phase and 120 volts phase to neutral.
The secondary side will be 120 either way.
The pita is that in order to supply the full 15KVA, you would need about 125 amps at 120 volt.
But hey, who needs 15KVA, right?
Bob
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