Great machines, those old 250s. It’s a little tricky to diagnose, but there is another diode on the brush holder that can go bad as well. I’ve yet to smoke a bridge rectifier, but have had one on the shelf for years just in case.
That look like a set of SK sockets do the sockets fit the case any better than they used to? Every time I grab 1 of my 4 sets and then set it back down I have to rearrange all of the sockets before I can use them.
There are two different major versions of the SA250. The earlier version is 100% DC, just like the smaller SA200. The later version has DC welding output, and a 3Kw 120/240 volt AC generator. The machine in the video must be the later version.
The bridge rectifier outputs positive dc on the + marked terminal, In most electronics Red is used for positive, in this case the black is connected to the positive.
@@djfaber Yes You are correct it is a 4 diode bridge. I had to go listen again to find out that I had referred to it without using the full name of the diode bridge rectifier. If it was for 3ph. input it would have 6 diodes in the bridge.
Another great video! Could watch this stuff all day. Yall Make information easy to digest.
Great machines, those old 250s. It’s a little tricky to diagnose, but there is another diode on the brush holder that can go bad as well. I’ve yet to smoke a bridge rectifier, but have had one on the shelf for years just in case.
Your such a great channel to learnimicate me!!
If that diode is bad would that cause no weld and no accessories power
Yes
That look like a set of SK sockets do the sockets fit the case any better than they used to? Every time I grab 1 of my 4 sets and then set it back down I have to rearrange all of the sockets before I can use them.
They stay OK, if kept flat, but otherwise they start to move, not perfect, but honestly have not found any other boxes that work at all.
There are two different major versions of the SA250. The earlier version is 100% DC, just like the smaller SA200. The later version has DC welding output, and a 3Kw 120/240 volt AC generator. The machine in the video must be the later version.
Thanks for sharing
Is the color difference because it's ac?
God bless you all!
No, the wires out of the diode bridge are D.C. The AC is on the other 2 wires.
Thats not a diode, that is a full wave bridge rectifier which contains 4x diodes, about 100A looking at that.
It seems backwards because that's a bridge rectifier (4 diodes)
The bridge rectifier outputs positive dc on the + marked terminal, In most electronics Red is used for positive, in this case the black is connected to the positive.
@@djfaber Yes You are correct it is a 4 diode bridge. I had to go listen again to find out that I had referred to it without using the full name of the diode bridge rectifier. If it was for 3ph. input it would have 6 diodes in the bridge.
Are you sure?
Positive