Thanks Fred.

So If I follow you, I have to pick one of those two options?

I ask as in the installation manual, it states if you do NOT want an AUX input 
to the KRX3, you can skip the steps. As presented, I did indeed skip those 
steps but when I arrived at the menu, I thought to myself, “Well, I selected 
neither option, so which one do I choose”. It sounds like maybe I wanted BNC as 
I really just want to let the subRX share the main antenna.

Thanks,

Tom Schaefer
727-437-2771

P.S. Drowning in email? I use SaneBox to instantly clean up my Inbox: 
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> On Jun 13, 2015, at 11:02 AM, Cady, Fred <[email protected]> wrote:
> 
> Hi Tom,
> Here is how I have it figured out:
> 
> When you install your Sub receiver you must chose an antenna configuration 
> and then physically connect a TMP cable inside the K3 from the Sub receiver's 
> J92 antenna input to one of two places.  First, you can connect the receiver 
> to the K3's ATU, which allows the Sub receiver to either share the same 
> antenna the Main receiver is using (ANT1, ANT 2, or RX ANT IN if a KXV3A is 
> installed).  You may also choose to have the Sub receiver use whichever 
> antenna the Main receiver is NOT using (ANT 2 if Main is using ANT1, or vice 
> versa).  You must set CONFIG:KRX3 Ant=Atu for this option.  This may be your 
> best choice for all around operating with a variety of antennas.  Section 
> 5.10.3 shows antenna selections when you make this choice.
> 
> The second choice is to connect the receiver to a separate auxiliary RF BNC 
> antenna connector.  In this case, the Sub receiver can share an antenna with 
> the Main or it can use a different antenna connected to the AUX RF BNC.  Set 
> CONFIG:KRX3 Ant=bnc if you choose this option.  This may be your best choice 
> for diversity receiver operation with specialized receive antennas.  Section 
> 5.10.4 gives diagrams showing antenna choices for this configuration.
> Note: You cannot transmit on the AUX RF BNC.
> 
> I think some of the confusion comes from what the K3 displays when you switch 
> the Sub's antenna.  When sharing the main antenna, it shows MAIN;  when 
> switched to the other choice, it shows AUX but that doesn't necessarily mean 
> the AUX BNC.  In this case it depends how you have your Sub receiver 
> connected -- Ant=Atu or Ant=bnc.
> 
> Cheers,
> Fred KE7X
> 
> Author of:
> "The Elecraft K3: Design, Configuration and Operation 2nd ed"
> "The Elecraft KX3 - Going for the summit"
> "The Elecraft KPA500 and KAT500 - the K-Line Dream Station"
> Printed, coil bound copies of these are all available at www.elecraft.com
> KPA500 and KAT500 Quick Set Up Guide
> http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
> KAT500 and KXPA500 Tuner Operation
> http://www.ke7x.com/home/kat500-and-kxpa100-tuners
> 
> "The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line 
> Station" available at www.lulu.com.
> 
> ("The Elecraft K3S and P3" in preparation)
> 
>> -----Original Message-----
>> From: Elecraft [mailto:[email protected]] On Behalf Of
>> Thomas Schaefer
>> Sent: Saturday, June 13, 2015 8:30 AM
>> To: [email protected]
>> Subject: [Elecraft] Question about KRX3 install
>> 
>> Hello,
>> 
>> I have a question about the sub receiver I installed this weekend.
>> 
>> The procedure for the aux antenna states you have two options for an
>> AUX antenna, either put the BNC in the back of the radio OR connect
>> though the KAT3 so the non used antenna port is the AUX.
>> 
>> From reading the book, I presumed this is an optional step. In other
>> words, I can do the BNC jack, connect the KRX3 to the KAT3 or NEITHER.
>> 
>> I choose neither. I hope I got that right.
>> 
>> My question is that when I tell the radio that I am using the KRX3, I
>> select from Not Installed, AUX-BNC or AUX-KAT (paraphrasing). Well,
>> since I did not do either of what I consider optional steps, neither
>> one of those makes sense to select. I selected the KAT option but if
>> the steps are really optional, I would thing the CONFIG options should
>> be ON-NoAUX, AUX-BNC or AUX-KAT.
>> 
>> Can someone clarify if the AUX steps are indeed optional and if so,
>> which KRX3 option should I select in CONFIG.
>> 
>> Thanks,
>> 
>> Tom NY4I
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Tom Schaefer
>> 727-437-2771
>> 
>> P.S. Drowning in email? I use SaneBox to instantly clean up my Inbox:
>> http://sanebox.com/t/gdaz7
>> 
>> 
>> 
>> 
>> 
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