[Elecraft] KRX3 insatall

[ab2tc]

Hi,

I have absolutely no dip in the center of my LP-Pan display and I have never
heard anybody else having this problem either. The IF out port and the
crystal filter bank are driven in parallel by a buffer amplifier that
appears to be capable of driving both without gain loss due to the crystal
filter load.

AB2TC - Knut


Edward R Cole wrote
> I built my K3/10 and installed the KRX3 with no issues of different 
> audio levels.
> 
> BTW running both Rx with dual LP-Pan on MAP65v2.3 sw shows the audio 
> level on a bar graph for each (when in diversity mode).
> 
> Two things were recently done to improve use of the 
> LP-Pan:  1)  Enabling an open filter position in the K3 and KRX3 
> eliminates gain "suck out" by roofing filter which is connected in 
> parallel with the IF output jack.  It shows as a dip in gain on a 
> panadaptor spectrum display at center freq.  2)  Installed 32.860 MHz 
> xtal in LP-Pan which is 4x the IF freg of 8.215 MHz which eliminates 
> the previous +6 KHz freq. off set in the display sw (thanks to Larry,
> N8LP).
> 
> My 2m-eme dual-polarity adaptive receive system will get a work-out 
> in this weekend's eme contest.  It extensively uses the dual-Rx 
> diversity reception mode of the K3.
> 
> 73, Ed - KL7UW





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