re: FLx GN Adding Db gain
Posted by
ni0c on
Nov 11, 2008; 5:47pm
URL: http://elecraft.85.s1.nabble.com/FLx-GN-Adding-Db-gain-tp1330201p1486131.html
K3NA wrote:
"I've looked at three 400 Hz filters
to date and values do vary from
filter to filter; one of mine required 6 dB
gain. Other 8-pole filter
bandwidths also vary a bit as
well.
Just measure all the filters in the radio and true up the
gains. Don't
need to worry about what the actually gain numbers are,
as long as they
can be goosed up to a uniform level."
I have the 500 Hz 5-pole, 400 Hz 8-pole, and 200 Hz 5-pole
filters
and "trued up" the gains by ear and came up with 2dB, 6dB, and
8 DB respectively. This ability to adjust the gain in
one dB
increments to compensate for filter insertion loss is a
wonderful
feature of the K3. BTW, the 400 Hz 8-pole is my favorite
CW
filter.
73,
Chuck Guenther NI0C
K2/10 s/n 5853
K3/100 s/n 1061
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