[Elecraft] Problems with KRX3A

[Gareth M5KVK]

Hi Bill
The documentation around this is a bit confusing, but my understanding is that this setting defines where the SUB gets its AUX antenna feed from. It can either be BNC (the Aux RF socket on the back panel), or (if you have the ATU installed and therefore two ANT sockets) it can get it from whichever ANT socket is not being used by MAIN. As I do not have ATU installed, the only option that works is bnc.

I can choose either MAIN or AUX ant for the SUB by pressing RX ANT

Does this make sense?

Gareth, M5KVK

On 28/05/2020, 14:03, "Nr4c" <nr4c at widomaker.com> wrote:

    Sorry!  

    KRX3 Ant=bnc does not agree with both on MAIN. 

    Sent from my iPhone
    ...nr4c. bill


    > On May 28, 2020, at 8:54 AM, Gareth M5KVK <gareth.m5kvk at gmail.com> wrote:
    > 
    > I spent last evening checking the installation of the KRX3A. I did find one bit of incorrect plumbing (in the cables that connect the KRX3A to the rest of the K3S): however correcting it made no discernible difference.
    > 
    > The post-installation setup instructions pass OK and all the CONFIG menu options seem to be correct: though it is difficult to be sure.
    > 
    > With SUB on, SUB AF/RF at Max and Main AF at min: I get noise out of the speaker, but no signal: even though A and B are equal and the Main is definitely receiving a signal.
    > CONFIG
    >  KRX3 Ant=bnc
    >  L-MIX-R A B
    >  SPKRS 1
    >  SUB AF nor
    > 
    > Looks like an email to support is next.
    > 
    > Gareth, M5KVK
    > 
    > From: Gareth M5KVK <gareth.m5kvk at gmail.com>
    > Date: Tuesday, 26 May 2020 at 16:05
    > To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
    > Subject: Problems with KRX3A
    > 
    > Hi there
    > I bought a s/h K3S a couple of years ago (SN 10901). It has a KRX3A installed, but I’ve never tried to use it until now. When I enabled the sub receiver this morning, I found I was getting no signal.
    > 
    > I’ve checked various CONFIG settings and it’s set to use the MAIN ANT and it’s AF is independent of the K3S. In an attempt to make progress, I reviewed the installation instructions.
    > 
    > Item 4, after enabling TECH MD, is Tap DISP and rotate VFO B to display SYN1 and SYN2. I do not see these items. Any idea how to debug this?
    > 
    > 73
    > 
    > Gareth, M5KVK
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