[K3] [Elecraft] FLx GN Adding Db gain

[Jack Regan]

Thanks to all who responded to this thread. I have K3 1433 with 2.8K and 400
Hz. filters.  I boosted the 400 gain from 2 to 6 and the difference was
amazing.

 

With the NR the CW is now EASILY cleaned up at VERY narrow bandwidths! I
thought it was good before but now I see why contesters and DXers would love
this rig.

 

Jack, AE6GC 

  _____  

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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