orvillefpike said:
Since I'm making strips of .060" thick and .500" wide and since it
doesn't wind too well, I think that I am going to do like Tim Williams
did and wrap a winding of maybe 10 turns one on top of the other with
insulation in between and put 3 winding side by side and connect them
in series.
It's probably the most efficient way to use the space that I have
around the core anyway.
When I made mine, I think I made 8 double edge coil sets.
Each started with the middle of a ribbon section diagonal
across the bottom of the slot in a wooden form wide enough
for two coils, side by side. I wound the two ends of the
ribbon into one of the coils, with the ends at the outside.
Then I removed the wooden form and tied the coils, wrapped
them with mylar tape and epoxied them into a solid unit. I
stacked 4 of these on one of the E stacks, with thin spacers
between, to allow for some cooling air to get to the bottom,
and epoxied the coils onto place. I trimmed the coil ends
so that each overlapped the end of its neighbor, and lap
soldered then in series. This way, I could connect the
coils on one E stack either in series or in parallel with
the coils on the other E stack.
If this doesn't make sense and you want to understand this
example, let me know, and I will take the camera out to the
shop and photograph the ugly monster. It has never been
prettied up, with one half just sitting on the other, with a
thin slab of plywood or something between the halves. But I
have been welding with it, off and on, for about 20 years.
It works very well, with my buzz box and a rectifier, giving
a very quiet arc with almost no splatter. With some rods
the flux forms a smooth scab that curls up and falls off
when the weld cools (wish I could remember what kind of rods
those were), leaving a nice clean bead. That never happens
with AC feed.