Marteinn Sverrisson wrote:
Vic and Stewart, Tanks for answering
well, the ripple on the CW filter at 2kHz BW is abt 8db p-p.
the gain difference when the CW filter is offset to 1.2kHz
(for digital modes) and its BW is 1kHz is abt -3dB relative to
the OP1 filter (not bad?).
with the same at 200Hz BW the gain is -10dB relative to the OP1.
Maybe this is normal,
It seems more or less so. Some people have less attenuation when moving from 1
KHz to 200 Hz. It wouldn't hurt to make sure the toroid T7 is wound with the
proper number of primary and secondary turns.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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