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stoneysstarters
03-12-2009, 07:09 PM
I've got 60 bucks invested in my Miller Thunderbolt 225 A/c. Is it a good investment to spend about $300 to convert it to a/c-d/c?

gnm109
03-12-2009, 08:07 PM
I've got 60 bucks invested in my Miller Thunderbolt 225 A/c. Is it a good investment to spend about $300 to convert it to a/c-d/c?


You are probably trading dollars and would end up with a homemade machiine. You can buy a brand new Miller Thunderbolt AC/DC on eBay for $589 with free shipping and a nice warranty.

I'd buy the new Miller or a Lincoln AC/DC if only to get the warranty. Just my opinion.

G.A. Ewen
03-12-2009, 11:41 PM
I've got 60 bucks invested in my Miller Thunderbolt 225 A/c. Is it a good investment to spend about $300 to convert it to a/c-d/c?

I can't see how it would cost that much. All you need is 4 diodes and a heat sink.

macona
03-13-2009, 12:13 AM
Better off and spending a little more and picking up a used Miller Maxstar 140STR or 150ST

stoneysstarters
03-13-2009, 10:19 AM
The $300 was for a new rectifier and stabilizer coil from Miller and the hardware to hook it up right.

piniongear
03-28-2009, 09:03 PM
The $300 was for a new rectifier and stabilizer coil from Miller and the hardware to hook it up right.

I, like others suggest you take the $300, add a few hundred to it, and buy yourself a nice used Miller or Lincoln Mig machine.
The little T-Bolt is OK for the occasional stick job but a Mig is much more useful, and a way better spend of your hard earned $$$.
Just my 2.......... pg

radkins
03-29-2009, 01:16 AM
All you need is 4 diodes and a heat sink.


That would make it DC all right but it would be pulsating DC. It would still need to be stabilized through a capacitor or coil before it would be usable.

stoneysstarters
03-29-2009, 01:22 PM
I've been looking at the Ramsond machine posted by David Cofer.

Dawai
03-29-2009, 06:44 PM
The Hobart stickmate welder (AC/DC) I had cost somewhere around $300 best I remember.. worked great.

I also used it to derust things with it's dc output.

It is over in Summerville at a buddies house. If I build a metal framed outside building I may have to go get it back. I can't see myself dragging that high dollar miller-tig machine outside.

Considering you can sell the one you got, and upgrade. Why modify?

radkins
03-29-2009, 06:59 PM
I can't see myself dragging that high dollar miller-tig machine outside.


Plus trying to use a MIG/TIG outside in a breeze can be a real PITA! :mad:

Dawai
03-29-2009, 08:36 PM
That tig does a nice sizzling burn of stick welding.

Mine is a older engineered Miller 200 tig-stick machine. Not put the mig on piggy back yet. It's still over the other building.