15" Sanyo TV

No Load Current Draw
< 0.9A
Click to expand...

Wow, impressive. Especially no load current draw! Sounds good to me, though I'd probably still only turn it on as necessary. It needs to be pretty close to the batteries, ya know, so think handy access to turn it on/off.

Personally I'd probably locate it back in the battery lazarette and put a removable jumper AC cable between it and the shore power connector.

Joe, here's a simple explanation. Yah, it's still bumpy but not nearly as critical as trying to emulate a sine wave.
 
Sea Wolf":34dk4nnf said:
Don-
Thanks, I needed that! The circuit math is always a mental maze to wade through!
Joe.
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That's why I just do it and don't stress my synapses with theory like you and Boris do. :wink: I suspect TyBoo is from the same school I graduated from.

Actually, "boost converters" are pretty easy to find. They're usually disguised as a "Universal Laptop Adaptor" and the one I bought had 9 different tips included to power 15, 16, 19, 20, and 24 volt laptops from a cigarette adapter. I think it was all of $29. Sure, a 115v inverter would have done the job but that also meant using the inverter and the wall wart, and the combined inefficiency just bothered me no end, not to mention the pile of wires and devices I had to both hide and ventilate. Handy too; I can swap a tip and power/charge my laptop from the 12 volt batteries.
 
Don, thanks for the link on SMPS's (Switching Mode Power Supplies)! THAT'S what I was designing so many years ago that I forgot it was a DC to DC converter, not a 110VAC to DC conventional supply which can be done so simply with a step-down transformer, some diodes and caps. Back then they were just called "switchers", now they even have an ancronym -- wow! Like I said, barely got 80% back then, even with near perfectly "hand" wound transformers and inductors. The secondary trick of the design was how smooth you could get the various voltage outputs, not so easy with all the EMI floating around the board and component leads (...back then of course).

Yep, you got the more cost-effective DC booster setup, mine is a Targus, more like $79 for same tips and features. I lose.
 
Dora~Jean":3p03mytq said:
Yep, you got the more cost-effective DC booster setup, mine is a Targus, more like $79 for same tips and features. I lose.
Steve
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Nobody loses, Steve. :lol: Targus is definitely quality, whereas mine is Ebay Chinese built bottom end stuff. Likely less efficient than the Targus, but certainly more efficient than an inverter AND the TV's DC converter in series.

Usually when we dry camp while RV'ing, the only long term 115 volt draw is the TV anyway, so it's the most efficient use of battery assets. We have zero time "dry camping" on the Jenny B, so our needs are yet to be defined. No hair driers though - my Admiral prefers the wet head look. (long hair)

Don
 
Will prob' get clobbered, but...
I think the inverters just lead one into the mistaken idea that you have lots of power aboard. The ones I've had in boats and motorhomes in the past would suck the house batteries down in minutes using household appliances. Since most electronics can use the "lighter plug-in" mini-inverters as just mentioned, and since you can get juice sucking 12 V coffeepots, roasters, hair dryers, etc., I think it is a waste of weight and adds unnecessary complexity to install huge inverters in campers or boats.

So, I put the inverter question into the KISS file and pass.

I bought my motorhome new in 2003 and specified "no inverter" and have not missed a thing for three years of heavy use and alot of dry camping on 12V only. I have no problem plugging in or using a genset when the desire for luxurious, unlimited 110v power hits me. You only have a limited supply of electicity in your batteries and the inverter actually lowers the total usable electricity available.

John
 
drjohn71a":2zjw9pxc said:
Will prob' get clobbered, but...
I think the inverters just lead one into the mistaken idea that you have lots of power aboard. John
Click to expand...

Absolutely! (No, not that you're getting clobbered, but that you are absolutely correct. :lol: )
 
No affiliation yada yada but Buy Com has an Audiovox 10 in. LCD TV that includes: tuner, dvd player, speakers, two IR headsets, remote, AC and DC power, etc. on sale for $199 and including free shipping.

10 inch tv link

I haven't bought one but am pondering it.

Go Tigers,

and regards, Mark
 
drjohn71a":x2jrw2fh said:
Will prob' get clobbered, but...
I think the inverters just lead one into the mistaken idea that you have lots of power aboard.
John
Click to expand...

We've found inverters are a must for running powerful blenders
while at anchor (yeah, I know there are 12V blenders).

You can make lots and lots of drinks without straining your
batteries too much.

Mike
 
Mike, you're right. I must admit I have a small 400W inverter squirreled away just for those trips that I can't live without my ice shaver (very small) to make a couple of snow cones. Summertime at Catalina comes to mind...ahhh. Short duration uses, not a problem.
 
Not For Hire":14jlw57y said:
No affiliation yada yada but Buy Com has an Audiovox 10 in. LCD TV that includes: tuner, dvd player, speakers, two IR headsets, remote, AC and DC power, etc. on sale for $199 and including free shipping.

10 inch tv link

I haven't bought one but am pondering it.

Go Tigers,

and regards, Mark
Click to expand...

I hope you got one... they are no longer available...

What brand was it?
 
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