[Elecraft] KX3 beta firmware rev 1.87-better AM BCB sensitivity

[Edward R Cole]

I installed beta rev. 1.87 and selected the BCB=160 and observed my 
local AM station on 920 KHz go from S8 to S9+5 with PRE on set at 20-dB.

I then tuned down to 495 KHz and am able to see signals at S9 that 
were at noise level before!  Noise floor is S6 with BCB=160/PRE 
ON.  With BCB=NOR everything is S0 at 495 KHz.

This quick test was into my 80m inverted-V and not the 600m 
inverted-L (which needs repairs).

73, Ed - KL7UW
http://www.kl7uw.com
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