Posted by
Bruce Beford-2 on
URL: http://elecraft.85.s1.nabble.com/asking-for-operation-tips-KRX3-tp6442343p6442502.html
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:
[hidden email]]
Sent: Sunday, June 05, 2011 11:51 AM
To: Bruce Beford;
[hidden email]
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
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