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Tried posting this last night but there must have been a problem with servers as several of my favorite sites were down or painfully slow. Good thing that I composed it in Notepad so that I could cut and paste it now.
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Soundguy,
I gotta toss my hat into the Lincoln ring as I have a 225 ac/dc that my dad gave me several years ago. Actually we did a little horse trading that saw a 225 amp Sureweld that I bought for $50 go to my brother and the old 1948 Fourney 180 amp welder go to my dad. My dad and his dad bought the Fourney brand new in '48 and other than one of the capacitors blowing it still worked just fine but I'm not sure where it is since he died.
He wanted me to have his Lincoln since I was tigging aluminum with the Sureweld and a small high frequency unit and I could tig steel and stainless if I had DC.
When I was growing up we were always partial to Miller and had several Dial Arc 250 ac/dc machines and AEAD200 LE portable welders. Frankly I've used a lot of different welding machines in the past 40 years and quite a few processes. For your desire though I think that you can't go wrong with the Lincoln.
My favorite welder however is the ReadyWelderII 10000ADP,
http://www.readywelder.com/10000adp.htm
When I first looked at these on the internet in 2002 they were interesting but toy like. I had stick welded with a couple of batteries before and I fanally decided to buy one in Jan 2005 when I needed to do aluminum welding and didn't have access to 220v power for my tig setup.
I won't go into all that it can do since you can read about it on the website but I can say that everything that they say is true.
The best part is the portablilty, it travels in a small suitcase and I carry mine on a golf cart. When I get to the place that I need weld, I just flip up the seat and connect the clamps to 3 batteries in series (48 volt system). I can weld for hours like this and still ride the cart back home since I have 6 batteries and only use 3 at a time. The cart gets recharged overnight and is ready to go in the morning again.
This works especially well with flux cored steel wire as I don't have to carry any shielding gas. Also the wind will blow the shielding gas away and screw up the weld.
Buzz boxes have their place but they are limited, especially when requiring 220v power as wilfick pointed out with the 12kw generator to power his Lincoln. With the cost of the generator he has probably $1,400 invested so he can weld in the field, granted that the generator can be used for other things but it's still a pretty good outlay of money. I can do more work for the $390 that I paid and I don't have a duty cycle, the only limiting factor is the battery power and I have yet to exhaust that. I give out before they do. Then there is the weight of lugging around the Lincoln and generator, gasoline and upkeep. If I had to do all of that I'd be too tired to weld after getting it set up and running.
When I travel with my 5th wheel camper I throw the ReadyWelder in the front and power it off the 2 house batteries. Last year it paid for itself in Pa to weld one of my rear jacks back together.
Right now I have my bush hog laying on it's side in the driveway with 20' of angle waiting to get welded on. I plugged in the golf cart last night so it's ready, just got to drive it a little closer. My buzz box is sitting in the cargo trailer and the leads will reach but I'd have to change out the power and put the camper on 30 amps so I can plug into the 50 amp on my temp pole. Then lay out the leads, rods, ect... The ReadyWelder is much easier and it is cheaper since I'm not running up my electric bill.