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Old 03-16-2012, 12:58 AM   #15
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Bought a 19" at Best Buy, their house brand Insignia, great picture and the transformer steps it down to 12 volt. Went to Radio Shack and bought the corresponding fitting with a 12 volt plug and it works great!
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Old 03-16-2012, 09:27 AM   #16
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We bought the 22" Viore LED 12v with DVD player several years ago. Works great. $199.
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Old 03-16-2012, 11:08 AM   #17
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I went to a huge appliance store named Brand Smart. I saw a 12 volt 19" with DVD for $160.00. I did not buy it because I am not ready for the TV until the inside is complete.

I will got with a 12 volt. I am worried about the DVD breaking, but the price was right.

Brian
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Old 03-16-2012, 11:18 AM   #18
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Are you guys still getting regular TV signal over air??????

I though everything went digital down there.

Dave
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Old 03-16-2012, 05:11 PM   #19
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I have been using the Skyworth 22" w/built-in DVD for over two years without any problem. As a matter of fact when I trade-in my 20' Safari I got the dealer swap my Skyworth with 19" Toshiba (120 Volt) in 2011 23 FB Serenity.
This way I do not need invertor and take energy loss in conversion
Good luch
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Old 03-16-2012, 11:13 PM   #20
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Just wanted to provide some more info on both the tv that I have and the tv mount.

The tv is a 22" Vizio model # M220MV. It is 12v and only 3.3 amps, so only uses 40 watts- great for boondocking. It is LED, only weighs 7 lbs and is about 1.5" deep. I got it at Sams last year for about $200.

My tv mount is great! It is made by VideoSecu, model ML10B and is black. It weighs about 3 lbs, is a very simple design and was less than $20 on line. It will hold tv's up to 33 lbs.

Dan
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Old 03-17-2012, 07:20 AM   #21
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Dan

I know you've mentioned before your tv setup. I can't remember, how did you change over to the 12v supply? I know your tv came with an external power supply, but where or how did you get a cable that plugged into the tv and with 12v plug on other end? Did you custom make it?
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Old 03-18-2012, 01:07 PM   #22
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Jason

I found lots of 12v pigtails around the house, but it takes a certain size to fit into the tv receptacle. It is really just a power cord to go from your 12v Airstream electrical connection to the tv. If you don't have one around the house, go to Radio Shack. Here are some photos of the electrical connector in the Airstream (excuse the dirt), the end of the connector that plugs into the tv, the power cord plugged into the tv and the tv nameplate on the back of the tv. I think I may have shortened the power cord to cut down on any electrical losses. No need to have it any longer than necessary. I hope this helps.

Dan
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Old 03-18-2012, 03:40 PM   #23
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I should have asked that a bit differently. What I'm wondering is how the 12V (or 12.2V or 13.4V or whatever the camper happens to have at a given time) converts to what the TV needs. For example: I have a device where the DC output of the transformer is 19V at 3.7A. If I get a matching plug for where it goes into the device so that power is transferred (like you got at Radio Shack), then will the device run from my 12V supply in the trailer even though it gets 19V from the transformer that it came from the factory with? Is it not really the voltage that's important but the power? In other words my device needs 70W (19V * 3.7A) so when I connect it to a 12V supply it will take 5.8A (70W / 12V)?

I may be an engineer, but not an electrical one.
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Old 03-18-2012, 04:46 PM   #24
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Now I am confused. Why would you have anything other than 12v in your MH or trailer? Do you not have 12v batteries in both of them and a 12v converter? What fans do you have for the vents and the furnace? Are they not 12v?

We will have to wait for the electrical types to chime in. I am an ME, not an EE.

Dan
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Old 03-18-2012, 06:55 PM   #25
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Our trailers are "12V" but if they are at full charge and your converter is still connected, then you're likely more like 13.X volts. Remove the charger / converter and you'll drop to something around 12.X. If you're boondocking and using power, then slowly your voltage will drop and eventually you'll get to 11-something volts, then 10-something until eventually you either blow a fuse or the device you're trying to run just won't work i.e. the lights gets dim, the fridge display (if new enough) says it can't run because the DC voltage is too low, etc.
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Old 03-19-2012, 07:21 PM   #26
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I agree with what you said in your last post. What threw me was your previous post where you talked about voltages of 19v from a transformer(?).

I don't know the voltage range where the tv will operate without problems, but I assume that the normal range that it will see which is 11.9-13.5 volts will be just fine. I have actually used my tv very little, but it has worked just fine.

Dan
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Old 03-20-2012, 07:15 PM   #27
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19V from a transformer is a true statement, too. Perhaps transformer is the wrong word to use, but I'm referring to the little black boxes in between the 115V AC outlet on the wall and the DC plug that goes into a TV, laptop, cell phone, computer speakers, etc. etc. etc. On the labels on these little boxes, one can find DC output ratings. It can range from about 6V to 20V DC with a range of amps, too. In the case that I was speaking about, 19V at 3.7A, was the ratings for the little black box from the laptop computer that we take with us when we go camping. I also have a projector (for the kids to watch movies outside while camping) which takes 19V and some amps. The non-electrical mind that I have tells me that if I plug that in to the roughly 11.5 to 13.5V system of the Airstream that it won't work. But maybe I'm wrong. I'm hoping that an electrical guru that's reading this thread can enlighten all of us.
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Old 03-21-2012, 07:18 AM   #28
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Jason

After reading your last post and being initially confused again about your 19v transformer output the light finally went on in my pea brain. You are mixing apples and oranges Jason. I have been talking about the voltage for your 12v dc battery system. You have been talking about the voltage from an adaptor plugged into your 120v ac outlets. Depending on what you are powering, the output from these transformers or adaptors will be what ever the device needs.

If I have power to the 120 ac outlets, I can plug the adaptor into the receptical to power the Vizio tv. The inlet is of course 120v ac, the outlet is 12v dc. Now the reason for having a 12v tv is so that you can power it directly from your batteries when boondocking. With a normal tv, I would need to go from the batteries thru an inverter to power the 120v ac outlets and then power the tv. There are losses anytime you do this of about 15-20%, I believe. But if you have a 12v tv, you can power it directly from your batteries. This is what I am doing with my Vizio tv.

I hope this helps.

Dan
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