Hi Paul,
Am 10.03.2016 23:29, schrieb Paul Nicholson:
The
coils of the T filter wound on ferrite toroids get very
hot very quickly. It's the ferrite producing the heat not
the wire. I must have the wrong flavour of ferrite so I
ordered some different ones (nice blue EPCOS ones) but they
wont arrive till Monday. Meanwhile I'll wind some air cored
coils for the filter.
The ferrite seems to saturate.
I recommend using iron power cores of -2 type (everywhere available,
cheap, well working world wide). For your power level, T106-2 or maybe T130-2
types are suitable. A T200-2 can be used for 1 kW when wound to j50 Ohm
at LF.
73, Stefan
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