[UK-CONTEST] Bandpass Filters

[Jim Martin]

Just getting down to making a set for the SO2R set-up.  The design I have is
from K4VX dated 1988 using a 3 pole Butterworth BPF.
Couple of questions, is this still a good design to use or have other
reproducible designs been published?  ( Ideally they would cope with 150w of
RTTY but I suspect this would put the cost through the roof!)
Regarding suppliers, are there UK companies who will supply Amidon cores and
other suitable components to the public?
Thanks
Jim  MM0BQI


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