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Re: construction of a transformer core?



Tesla List skrev:
> 
> Original Poster: "Jeff Corr" <corr-at-enid-dot-com>
> 
> I would like to build my own transformer, but since I
> don't have any used cores to wind it on, I was wondering
> if there is any material that would be useful in the actual
> construction of a transformer core...

Jeff, rolling your own is definately the way to go, particularly if you
live outside the USA, but don`t start with inventing the wheel over
again: you need proper laminations to make a transformer that will meet
the demands that is expected of a modern product: low idle current,
silent operation etc.
You must realize, that the ordinary e-i laminations that you see in the
everyday consumer product is designed for relatively low voltage
operation, which means that no particular insulation, other than that of
the wire itself, is needed.

In a 15 kV+  transformer, you should calculate the space requirements
for the secondarys to be 2-3 times that of the primary windings.
This requirement is not met by the average neon transformer, and
therefore it fails, when it is utilized at high voltage.

I bought a core from German BLUM transformers, and you can see a
pictorial of the construction if this transformer at:

http://home5.inet.tele.dk/f-hammer/tesla/pig/porkchop.htm

Another way would be to find your way around the scrap yards, or
recycling facilities in your area, where, in time, you will find what
you need, and much more.

Hope this helps, Finn Hammer