I have an older Linde / Union Carbide AC/DC Tig/Stick welder (weighs 800
lbs!). It is a great welder that I'm extremely happy with. There are
very few components that could go wrong with this welder since it has no
electronics in it what so ever. However there are a couple of
capacitors that I have seen fail on similar welders. The particular
capacitors in question are in the high frequency circuit and are .002
mfd Mica 5000 volt capacitors. I've picked up the following capacitors
as potential replacements should the original ones finally fail. Later
units used 10,000 volt capacitors probably due to failures of the lower
The ones I have picked up are listed below:
Mica .002 mfd 5000 volts 6.2 amps 1000 k.c.
Mica .002 mfd 6000 volts 6.2 amps 1000 k.c.
Mica .002 mfd 6000 volts 13 amps @ 3000 k.c. or 11 amps @ 1000 k.c or
7.5 amps at 300 k.c.
Mica .002 mfd 10,000 volts 14 amps @ 1000 k.c. or 8 amps @ 300 k.c.
The Sangamo and the Cornell-Dubilier look identical, brown rectangles
with terminals on top and the only difference being one has a potted
assembly and the other has a little plate with 4 rivets on the bottom in
stead of potting.
The Aerovox and the Sprague are transmitting capacitors and are
cylindrical with mounting ears on top and bottom. I am assuming the
wires are attached to the top and bottom mounting holes.
What I'm wondering is whether the transmitting capacitors can be used in
place of the original capacitor without either being destroyed or not
functioning properly in the high frequency circuit of the welder.
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