Hi Lf's
in all circuit
diagrams I find filters like
12nF---->54uH---->27nF----->54uH----->12nF
here is the 3db
point at 250khz.
Has anyone test a filter in this configuration
47nF-----> 54uH----->82nF------54uH----->47nF
here is the 3db
point at 147khz.
The 2. filter gives a better suppress of the
harmonics!
Wat is the reason that all use the fist one?
best 73' Tom
DL4EAU
Lower insertion loss.
At 1200 Watts every 0.1dB counts. and with a push pull design,
the second harmonic should be very low.....it's the odd order harmonics you need
to worry about.
Regards
David
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