[Elecraft] Diversity reception - KRX3

[Bruce Beford]

Yes, Johnny. the idea is to have the same offset for both filters. That is
why many people get the 8-pole filters for main and sub RX. They have (near)
zero offset. You two 5-pole filters are a considerable distance apart in
offset. (700 Hz) I do not know what is "acceptable" for a difference, as you
will be shifting each of these 350Hz from optimum. (-.59 offset). Perhaps
someone else may be able to comment on this. Another possibility is perhaps
to trade one filter with someone else (or Elecraft) for one closer in
offset. I have 8-pole filters in my main and sub RX, so I have no personal
experience with this.

 

GL,

Bruce, N1RX

 

  _____  

From: Johnny Siu [mailto:vr2xmc at yahoo.com.hk] 
Sent: Sunday, June 05, 2011 11:51 AM
To: Bruce Beford; elecraft at mailman.qth.net
Subject: Diversity reception - KRX3

 

Bruce,

 

Its all right.  I need to read the K3 manual a couple of times to get the
answer as well.  

 

I do have another question.  The offset of the K3 main 2.7Khz filter is
-0.24.  Since I bought my KRX3 at a later stage so that I do not have a
match pair of 2.7Khz filters.  The offset of the 2.7Khz filter in KRX3 is
-0.94.

 

>From my reading of the manual, for diversity reception, I should set the
off-set of both receivers at an average of -0.24 & -0.94.  I just do not
know whether my understanding is correct.  Any idea?

 

TNX & 73,

 

Johnny VR2XMC