Thanks Mark Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference.
Gareth On 28/05/2020, 16:08, "Mark Musick" <[email protected]> wrote: HI Gareth, Sorry, I sent my previous e-mail to you before seeing this one. You have jogged my memory. I still believe KRX3 ANT= ATU is correct, but what jogged my memory Gareth is I believe, and I'll have to check, is that if you have the ATU installed with the two antenna ports you can use the non-transmit port for a receive antenna. In other words if you have the ATU and have ANT1 selected as the transmit antenna you can select ANT2 for receive. It may be that setting is set to ANT2 when it should be ANT1. However, I believe the K3 is smart enough to know that ANT1 is the only one available when there is no ATU installed. 73, Mark, WB9CIF -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Gareth M5KVK Sent: Thursday, May 28, 2020 14:53 To: Nr4c <[email protected]> Cc: [email protected] Subject: Re: [Elecraft] Problems with KRX3A 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" <[email protected]> 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 <[email protected]> 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 <[email protected]> > Date: Tuesday, 26 May 2020 at 16:05 > To: "[email protected]" <[email protected]> > 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. 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