Re: OP1 and CW filter gain difference?
Posted by
Vic K2VCO on
Apr 08, 2005; 6:51pm
URL: http://elecraft.85.s1.nabble.com/OP1-and-CW-filter-gain-difference-tp376780p376783.html
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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