Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Hi All
I just wanted to put on record my thanks to all those who offered advice and 
support as I worked through the issue with my KRX3A.

It’s all working now. For the record, I think it was a poor connection caused 
by one of the TMP cables not being engaged fully.

73

Gareth, M5KVK

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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

It seems to have been a transient. Signals appear to be comparable this morning.
This is all by ear of course.

73
 
Gareth, M5KVK

On 31/05/2020, 18:09, "Grant Youngman"  wrote:

Glad to hear you got it working.  But you shouldn’t be seeing a signifiant 
difference between the two receivers, unless something is set differently 
between them, or there’s another issue floating around.  

Grant NQ5T

> On May 31, 2020, at 12:36 PM, Gareth M5KVK  wrote:
> 
> Well, I’ve solved the initial problem. I stripped the rig back to its 
pre-KRX3A state and then re-installed: after checking performance.
> 
> I can only surmise that there was a poor connection somewhere, as 
basically all I did was re-installed some TMP cables.
> 
> The performance of the SUB is poorer than I would expect. It receives 
signals OK but at a considerably (more than -3dB) lower level.
> 
> 73
> 
> Gareth, M5KVK
> 
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Re: [Elecraft] Problems with KRX3A

[Grant Youngman]

Glad to hear you got it working.  But you shouldn’t be seeing a signifiant 
difference between the two receivers, unless something is set differently 
between them, or there’s another issue floating around.  

Grant NQ5T

> On May 31, 2020, at 12:36 PM, Gareth M5KVK  wrote:
> 
> Well, I’ve solved the initial problem. I stripped the rig back to its 
> pre-KRX3A state and then re-installed: after checking performance.
> 
> I can only surmise that there was a poor connection somewhere, as basically 
> all I did was re-installed some TMP cables.
> 
> The performance of the SUB is poorer than I would expect. It receives signals 
> OK but at a considerably (more than -3dB) lower level.
> 
> 73
> 
> Gareth, M5KVK
> 
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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Well, I’ve solved the initial problem. I stripped the rig back to its pre-KRX3A 
state and then re-installed: after checking performance.

I can only surmise that there was a poor connection somewhere, as basically all 
I did was re-installed some TMP cables.

The performance of the SUB is poorer than I would expect. It receives signals 
OK but at a considerably (more than -3dB) lower level.

73

Gareth, M5KVK

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Re: [Elecraft] Problems with KRX3A

[Jim Brown]

On 5/28/2020 3:27 PM, w4sc wrote:

If the TMP cable was ever pulled on to unplug the connector, there is a better 
than even chance the center conductor is broken.


Yes, and I had the receptacle for a TMP cable come unsoldered from the 
circuit board in one of my K3s.


73, Jim K9YC
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Re: [Elecraft] Problems with KRX3A

[w4sc]

If the TMP cable was ever pulled on to unplug the connector, there is a better 
than even chance the center conductor is broken.
Ben W4SC
Sent from Mail for Windows 10

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Re: [Elecraft] Problems with KRX3A

[Howard Stephenson]

Make sure the TMP connector center section on the boards is not broken or
push out. Easy to do if the TMP  tip not lined up into the connector.
Also make sure that the pins from the SUB to the RF board are not missed
aligned.

Howard K6IA
Las Vegas
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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks for the comprehensive reply, Rick.

I'm about to make a start on pretty much the same diagnostic approach. I'll let 
you all know how I get on.

Gareth, M5KVK

On 28/05/2020, 18:00, "elecraft-boun...@mailman.qth.net on behalf of Rick 
Bates, NK7I"  wrote:

Gareth,

The information you have been given is correct but it's a challenge to 
wrap ones head around the details, a couple are subtle.

It is ultimately the items you have installed (the tuner, with the 
second antenna port) AND the connection of cables to the KRX3 (which 
connector source is chosen), THEN the setting in menu (KRX3 = ANT | BNC) 
to match those choices.

[The KRX3 will listen to ANT 1 | 2 with a tuner OR will listen to MAIN 
(whatever the main RX is using) | BNC; with or without a tuner (I think 
that's all inclusive).]

Then, the use of the front panel to engage which feed is in play, based 
on the options above (ANT 1 or 2; with a tuner| Main or BNC).

In my case, with a tuner (unused, one port to a KPA1500, the other to a 
dummy load) I chose to use the BNC as the RX source for the KRX3, simply 
so I cannot transmit into it, ever, and have diversity reception.  I can 
listen via main or BNC (RX system) and worry less about doing something 
stupid like blowing up the RX system and/or finals.

It also means that if I want the main receiver to hear the RX antenna 
(but transmit on the transmit antenna) I have to move a cable on the K3 
in the back (or provide a antenna switch), both are BNC, one is more 
challenging to reach through the maze of wires.

I'm hoping from the comments, that the K4 will be simpler to configure 
(on the fly) as most of us need simpler as we age ;-)   The most 
difficult part is deciding how one will use the tools most effectively, 
then put the parts in the right place to meet that/those goal/s.

None of which answers your original question.

I don't mean to be pedantic or insulting; I try to be complete because 
it's always the simplest of things that are the most elusive; details 
matter.

Assuming that the menu is set to enable a KRX3 and both SYN are showing 
expected results based on which SYN is installed (you've done this):

Hearing the rx audio 'rush' noise is a good start (use headphones, don't 
mix audio from the main RX); the audio stage is working, now look backwards.

Check the KRX3 filter selection to make sure that (a) the filter (menu) 
choice is correct (right filter) and (b) visually confirm the presence 
of the filter (DOH!) and (c) is actually IN the slot chosen (menu 
setting again).  Nothing is automatic, you tell the firmware what and 
where filters are installed.  (A quick test is to change the filter 
bandwidth on the front panel [B SEL or speaker/headphone audio]; note 
any audio changes from wide to narrow, if any.)

Then (if no success) I would start with actually seeing how the TMP 
cables are connected (you need to know anyway then change if needed to 
meet your goals); ARE they in the correct place; testing them along the 
way for continuity and shorting; then make sure that each is seated 
_fully_ (easy to miss) and correctly (hemostats or very small point 
pliers on the cable metal connector, very gently but firmly; tactile 
senses cranked up, damage is easy).  Do NOT ever pull on the cable itself.

Recheck the menu for the correct source settings again (in particular if 
you made changes).

If still no joy, based on your time difference to CA, an email of your 
test/findings to the repair team at Elecraft would be the best choice.

Please post your results, good and bad so others can learn too.

73,
Rick NK7I



On 5/28/2020 8:54 AM, Gareth M5KVK wrote:
> Thanks, Clark
> I think I’m going to open her up again and test all the connecting cables.
>
> Never mind, at least I get to use my K2 for a change 😊
>
> Gareth, M5KVK
>
> From: Clark Macaulay 
> Date: Thursday, 28 May 2020 at 16:47
> To: Gareth M5KVK 
    > Cc: Mark Musick , "elecraft@mailman.qth.net" 

> Subject: Re: [Elecraft] Problems with KRX3A
>
> Hi, Gareth.
>
> Well...you certainly have a mystery here. I found the documentation in 
the Elecraft manual on this subject a little hard to follow; the book by Fred 
Cady on the K3 is better and, if you'd don't have have it, I highly recommend 
it.
>
> I think you said on a previous post that you can hear the noise of the 
SUB when enabling it, then you are correct that there is something blocking the 
signal from the antenna.  Assuming the configuration is correct, it might be 
the cable inside the K3 that feeds the signal to the SUB.  When I

Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks, Ben
I'm going to open her up again and do another check on the seating of the KRX3: 
it's quite difficult to be sure both the multi-way connectors are properly 
mated. I'm also going to check continuity on all the leads.

Gareth, M5KVK

On 28/05/2020, 17:38, "elecraft-boun...@mailman.qth.net on behalf of w4sc" 
 wrote:

Ref pp 43 of KRX3 Istallation and User Guide  Rev F  Dec 22 2010

ALWAYS  Set ANT = BNC if not connected to KAT3.

Clarification:I believe config selection ANT=ATU may be inserting 
attenuation during transmit in the KRX3 signal path to provide protection.

Make sure KSYN3 tmp connections good. I had the KRX3 “dead” issue on 
friends K3.

Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] Problems with KRX3A

[Rick Bates, NK7I]

Gareth,

The information you have been given is correct but it's a challenge to 
wrap ones head around the details, a couple are subtle.


It is ultimately the items you have installed (the tuner, with the 
second antenna port) AND the connection of cables to the KRX3 (which 
connector source is chosen), THEN the setting in menu (KRX3 = ANT | BNC) 
to match those choices.


[The KRX3 will listen to ANT 1 | 2 with a tuner OR will listen to MAIN 
(whatever the main RX is using) | BNC; with or without a tuner (I think 
that's all inclusive).]


Then, the use of the front panel to engage which feed is in play, based 
on the options above (ANT 1 or 2; with a tuner| Main or BNC).


In my case, with a tuner (unused, one port to a KPA1500, the other to a 
dummy load) I chose to use the BNC as the RX source for the KRX3, simply 
so I cannot transmit into it, ever, and have diversity reception.  I can 
listen via main or BNC (RX system) and worry less about doing something 
stupid like blowing up the RX system and/or finals.


It also means that if I want the main receiver to hear the RX antenna 
(but transmit on the transmit antenna) I have to move a cable on the K3 
in the back (or provide a antenna switch), both are BNC, one is more 
challenging to reach through the maze of wires.


I'm hoping from the comments, that the K4 will be simpler to configure 
(on the fly) as most of us need simpler as we age ;-)   The most 
difficult part is deciding how one will use the tools most effectively, 
then put the parts in the right place to meet that/those goal/s.


None of which answers your original question.

I don't mean to be pedantic or insulting; I try to be complete because 
it's always the simplest of things that are the most elusive; details 
matter.


Assuming that the menu is set to enable a KRX3 and both SYN are showing 
expected results based on which SYN is installed (you've done this):


Hearing the rx audio 'rush' noise is a good start (use headphones, don't 
mix audio from the main RX); the audio stage is working, now look backwards.


Check the KRX3 filter selection to make sure that (a) the filter (menu) 
choice is correct (right filter) and (b) visually confirm the presence 
of the filter (DOH!) and (c) is actually IN the slot chosen (menu 
setting again).  Nothing is automatic, you tell the firmware what and 
where filters are installed.  (A quick test is to change the filter 
bandwidth on the front panel [B SEL or speaker/headphone audio]; note 
any audio changes from wide to narrow, if any.)


Then (if no success) I would start with actually seeing how the TMP 
cables are connected (you need to know anyway then change if needed to 
meet your goals); ARE they in the correct place; testing them along the 
way for continuity and shorting; then make sure that each is seated 
_fully_ (easy to miss) and correctly (hemostats or very small point 
pliers on the cable metal connector, very gently but firmly; tactile 
senses cranked up, damage is easy).  Do NOT ever pull on the cable itself.


Recheck the menu for the correct source settings again (in particular if 
you made changes).


If still no joy, based on your time difference to CA, an email of your 
test/findings to the repair team at Elecraft would be the best choice.


Please post your results, good and bad so others can learn too.

73,
Rick NK7I



On 5/28/2020 8:54 AM, Gareth M5KVK wrote:

Thanks, Clark
I think I’m going to open her up again and test all the connecting cables.

Never mind, at least I get to use my K2 for a change 😊

Gareth, M5KVK

From: Clark Macaulay 
Date: Thursday, 28 May 2020 at 16:47
To: Gareth M5KVK 
Cc: Mark Musick , "elecraft@mailman.qth.net" 

Subject: Re: [Elecraft] Problems with KRX3A

Hi, Gareth.

Well...you certainly have a mystery here. I found the documentation in the 
Elecraft manual on this subject a little hard to follow; the book by Fred Cady 
on the K3 is better and, if you'd don't have have it, I highly recommend it.

I think you said on a previous post that you can hear the noise of the SUB when 
enabling it, then you are correct that there is something blocking the signal 
from the antenna.  Assuming the configuration is correct, it might be the cable 
inside the K3 that feeds the signal to the SUB.  When I opened up my K3 a while 
back to add a filter to the SUB. I noticed that one of the little coax cables 
entered the SUB at a pinched right angle (at least it was in mine).  While I 
didn't have a problem, it seemed like it could be a problem if I didn't make 
sure the little connector was firmly inserted.

I'm afraid I'm now beyond my pay grade on this...

On Thu, May 28, 2020 at 11:36 AM Gareth M5KVK 
mailto:gareth.m5...@gmail.com>> wrote:
Thanks Mark
Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference.

Gareth

On 28/05/2020, 16:08, "Mark Musick" 
mailto:markmus...@outlook.com>>

Re: [Elecraft] Problems with KRX3A

[Nr4c]

I think this only works if there is an ATU. 

Sent from my iPhone
...nr4c. bill


> On May 28, 2020, at 11:37 AM, Gareth M5KVK  wrote:
> 
> Thanks Mark
> Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference.
> 
> Gareth
> 
> On 28/05/2020, 16:08, "Mark Musick"  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: elecraft-boun...@mailman.qth.net  
> On Behalf Of Gareth M5KVK
>Sent: Thursday, May 28, 2020 14:53
>To: Nr4c 
>Cc: elecraft@mailman.qth.net
>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"  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  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 in
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Re: [Elecraft] Problems with KRX3A

[w4sc]

Ref pp 43 of KRX3 Istallation and User Guide  Rev F  Dec 22 2010

ALWAYS  Set ANT = BNC if not connected to KAT3.

Clarification:I believe config selection ANT=ATU may be inserting 
attenuation during transmit in the KRX3 signal path to provide protection.

Make sure KSYN3 tmp connections good. I had the KRX3 “dead” issue on friends K3.

Ben W4SC

Sent from Mail for Windows 10

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Re: [Elecraft] Problems with KRX3A

[Nr4c]

Only had a K3 w/out the KAT3, I’m not sure. But if Sub ant is bnc the you need 
to connect its ant to the bnc Aux port I think. 

Sent from my iPhone
...nr4c. bill


> On May 28, 2020, at 10:52 AM, Gareth M5KVK  wrote:
> 
> 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"  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  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 
>> Date: Tuesday, 26 May 2020 at 16:05
>> To: "elecraft@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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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks, Clark
I think I’m going to open her up again and test all the connecting cables.

Never mind, at least I get to use my K2 for a change 😊

Gareth, M5KVK

From: Clark Macaulay 
Date: Thursday, 28 May 2020 at 16:47
To: Gareth M5KVK 
Cc: Mark Musick , "elecraft@mailman.qth.net" 

Subject: Re: [Elecraft] Problems with KRX3A

Hi, Gareth.

Well...you certainly have a mystery here. I found the documentation in the 
Elecraft manual on this subject a little hard to follow; the book by Fred Cady 
on the K3 is better and, if you'd don't have have it, I highly recommend it.

I think you said on a previous post that you can hear the noise of the SUB when 
enabling it, then you are correct that there is something blocking the signal 
from the antenna.  Assuming the configuration is correct, it might be the cable 
inside the K3 that feeds the signal to the SUB.  When I opened up my K3 a while 
back to add a filter to the SUB. I noticed that one of the little coax cables 
entered the SUB at a pinched right angle (at least it was in mine).  While I 
didn't have a problem, it seemed like it could be a problem if I didn't make 
sure the little connector was firmly inserted.

I'm afraid I'm now beyond my pay grade on this...

On Thu, May 28, 2020 at 11:36 AM Gareth M5KVK 
mailto:gareth.m5...@gmail.com>> wrote:
Thanks Mark
Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference.

Gareth

On 28/05/2020, 16:08, "Mark Musick" 
mailto:markmus...@outlook.com>> 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: 
elecraft-boun...@mailman.qth.net<mailto:elecraft-boun...@mailman.qth.net> 
mailto:elecraft-boun...@mailman.qth.net>> On 
Behalf Of Gareth M5KVK
Sent: Thursday, May 28, 2020 14:53
To: Nr4c mailto:n...@widomaker.com>>
Cc: elecraft@mailman.qth.net<mailto:elecraft@mailman.qth.net>
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" 
mailto:n...@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 
mailto:gareth.m5...@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 
mailto:gareth.m5...@gmail.com>>
> Date: Tuesday, 26 May 2020 at 16:05
> To: "elecraft@mailman.qth.net<mailto:elecraft@mailman.qth.net>" 
mailto:elecraft@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’

Re: [Elecraft] Problems with KRX3A

[Clark Macaulay]

Hi, Gareth.

Well...you certainly have a mystery here. I found the documentation in the
Elecraft manual on this subject a little hard to follow; the book by Fred
Cady on the K3 is better and, if you'd don't have have it, I highly
recommend it.

I think you said on a previous post that you can hear the noise of the SUB
when enabling it, then you are correct that there is something blocking the
signal from the antenna.  Assuming the configuration is correct, it might
be the cable inside the K3 that feeds the signal to the SUB.  When I opened
up my K3 a while back to add a filter to the SUB. I noticed that one of the
little coax cables entered the SUB at a pinched right angle (at least it
was in mine).  While I didn't have a problem, it seemed like it could be a
problem if I didn't make sure the little connector was firmly inserted.

I'm afraid I'm now beyond my pay grade on this...

On Thu, May 28, 2020 at 11:36 AM Gareth M5KVK 
wrote:

> Thanks Mark
> Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference.
>
> Gareth
>
> On 28/05/2020, 16:08, "Mark Musick"  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: elecraft-boun...@mailman.qth.net <
> elecraft-boun...@mailman.qth.net> On Behalf Of Gareth M5KVK
> Sent: Thursday, May 28, 2020 14:53
> To: Nr4c 
> Cc: elecraft@mailman.qth.net
> 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"  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.m5...@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 
> > Date: Tuesday, 26 May 2020 at 16:05
> > To: "elecraft@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

Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks Mark
Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference.

Gareth

On 28/05/2020, 16:08, "Mark Musick"  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: elecraft-boun...@mailman.qth.net  
On Behalf Of Gareth M5KVK
Sent: Thursday, May 28, 2020 14:53
To: Nr4c 
Cc: elecraft@mailman.qth.net
    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"  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  
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 
> Date: Tuesday, 26 May 2020 at 16:05
> To: "elecraft@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
> __
> Elecraft mailing list
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Re: [Elecraft] Problems with KRX3A

[w4sc]

The config selection of  ANT=BNC / ANT=MAIN does NOT actually select which is 
used for KRX3 alternate antenna input.  When AUX input cable of the KRX3 is 
connected to the KAT3,  the NON-TRANSMIT antenna used for the KRX3.  Only one 
can be physically connected to be used by the KRX3.  If no ATU, the only 
connection that is available would be to the installed BNC AUX connection.  I 
believe this config selection may be inserting attenuation during transmit in 
the KRX3 signal path to provide protection.

For KRX3 AUX input  I would always build / config to use the BNC connection.  
There are 2 points of failure in the ATU that would be catastrophic for the 
KRX3 if either of 2 relays fail.

Ben W4SC

Sent from Mail for Windows 10
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Re: [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"  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  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 
> Date: Tuesday, 26 May 2020 at 16:05
> To: "elecraft@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
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Re: [Elecraft] Problems with KRX3A

[Nr4c]

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  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 
> Date: Tuesday, 26 May 2020 at 16:05
> To: "elecraft@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
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

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 
Date: Tuesday, 26 May 2020 at 16:05
To: "elecraft@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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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks, Clark
Switching the SUB between main and Aux makes no difference: there is no AF 
other than noise and nothing on the S meter when B SET is pressed.

Gareth

From: Clark Macaulay 
Date: Wednesday, 27 May 2020 at 16:49
To: Gareth M5KVK 
Cc: Grant Youngman , "elecraft@mailman.qth.net" 

Subject: Re: [Elecraft] Problems with KRX3A

Gareth,

I had a similar problem when my K3 returned from the factory after a few 
updates.  In my case, I had to press and HOLD the RX ANT button.  Don't 
remember where I read this but it worked.  Toggling this switch changes the Sub 
Rcvr between the main antenna and the receive antenna as the signal source.

The K3 is a remarkable flexible radio.  With that flexibility comes complexity 
at times that is hard to fathom--at least for me.

On Wed, May 27, 2020 at 9:50 AM Gareth M5KVK 
mailto:gareth.m5...@gmail.com>> wrote:
Great minds, Grant. That's my next step.

As I said in the OP, this was a rig bought secondhand.

Gareth M5KVK

On 27/05/2020, 14:35, "Grant Youngman" 
mailto:ghyoung...@gmail.com>> wrote:

Have you checked the installation of the receiver module?  Meaning that the 
two small riser modules that it plugs into are properly seated to the main RF 
board and the KRX3.  I had a dead sub-receiver problem once.  I had been in the 
radio at some point to install an update.  When reinstalling the KRX3, I had 
pinched one of the coax cables that’s in the vicinity of the riser nearest the 
front of the radio and pulled the cable out of it’s socket when reinserting the 
KRX3,  far enough not to work, but not so far that I noticed it until the next 
time I tried using the sub.

Just one more idea of something to look at.

Grant NQ5T

> On May 27, 2020, at 9:21 AM, Gareth M5KVK 
mailto:gareth.m5...@gmail.com>> wrote:
>
> I tried that, Richard.
> ANT definitely says MAIN but still no signal.
>
> Gareth
>
> On 26/05/2020, 18:40, "Richard Thorne" 
mailto:rtho...@rthorne.net>> wrote:
>
>Gareth,
>
>Try this.
>
>- Turn on the sub receiver by pushing sub
>- Push and hold B Set so the display shows b set
>- Be sure the ant shows Main and not AUX.  If it shows AUX push the ANT
>button to toggle between the two.
>
>May not be the problem but I've found for some reason my sub receiver 
is
>on the Aux antenna.  My rig doesn't have the ant tuner either.
>
>Rich - N5ZC
>
>On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
>> Thanks, Richard
>> There is no ATU, so there is only the one ANT to select. However, I have 
checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU, only this or 
BNC are offered as options)
>>
>> Gareth
>>
>> On 26/05/2020, 16:31, "Richard Thorne" 
mailto:rtho...@rthorne.net>> wrote:
>>
>> Gareth,
>>
>> You probably don't have the correct antenna port assigned to the sub
>> receiver.  I'm not in front of my rig, but I believe you need to push
>> and hold A/B (B Set) to get to the sub receiver, at that point be 
sure
>> the correct antenna port is selected.
>>
>> Rich - N5ZC
>>
>> On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
>>> 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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Pos

Re: [Elecraft] Problems with KRX3A

[Clark Macaulay]

Gareth,

I had a similar problem when my K3 returned from the factory after a few
updates.  In my case, I had to press and HOLD the RX ANT button.  Don't
remember where I read this but it worked.  Toggling this switch changes the
Sub Rcvr between the main antenna and the receive antenna as the signal
source.

The K3 is a remarkable flexible radio.  With that flexibility comes
complexity at times that is hard to fathom--at least for me.

On Wed, May 27, 2020 at 9:50 AM Gareth M5KVK  wrote:

> Great minds, Grant. That's my next step.
>
> As I said in the OP, this was a rig bought secondhand.
>
> Gareth M5KVK
>
> On 27/05/2020, 14:35, "Grant Youngman"  wrote:
>
> Have you checked the installation of the receiver module?  Meaning
> that the two small riser modules that it plugs into are properly seated to
> the main RF board and the KRX3.  I had a dead sub-receiver problem once.  I
> had been in the radio at some point to install an update.  When
> reinstalling the KRX3, I had pinched one of the coax cables that’s in the
> vicinity of the riser nearest the front of the radio and pulled the cable
> out of it’s socket when reinserting the KRX3,  far enough not to work, but
> not so far that I noticed it until the next time I tried using the sub.
>
> Just one more idea of something to look at.
>
> Grant NQ5T
>
> > On May 27, 2020, at 9:21 AM, Gareth M5KVK 
> wrote:
> >
> > I tried that, Richard.
> > ANT definitely says MAIN but still no signal.
> >
> > Gareth
> >
> > On 26/05/2020, 18:40, "Richard Thorne"  wrote:
> >
> >Gareth,
> >
> >Try this.
> >
> >- Turn on the sub receiver by pushing sub
> >- Push and hold B Set so the display shows b set
> >- Be sure the ant shows Main and not AUX.  If it shows AUX push
> the ANT
> >button to toggle between the two.
> >
> >May not be the problem but I've found for some reason my sub
> receiver is
> >on the Aux antenna.  My rig doesn't have the ant tuner either.
> >
> >Rich - N5ZC
> >
> >On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
> >> Thanks, Richard
> >> There is no ATU, so there is only the one ANT to select. However, I
> have checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU,
> only this or BNC are offered as options)
> >>
> >> Gareth
> >>
> >> On 26/05/2020, 16:31, "Richard Thorne" 
> wrote:
> >>
> >> Gareth,
> >>
> >> You probably don't have the correct antenna port assigned to
> the sub
> >> receiver.  I'm not in front of my rig, but I believe you need
> to push
> >> and hold A/B (B Set) to get to the sub receiver, at that point
> be sure
> >> the correct antenna port is selected.
> >>
> >> Rich - N5ZC
> >>
> >> On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
> >>> 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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-- 
73,

Clark, WU4B
Little Pistol With Wires
QRPARCI #10815
SKCC #3892
NAQCC #5055
CWOPS #1869
Collins Collectors #AC90-12432
Southeastern DX Club 
North Georgia QRP Club 


*"It is vain to do with more what can be done with less."*
*Attributed to *William of Occam (1288 AD - 1348 AD)
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Plea

Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Great minds, Grant. That's my next step.

As I said in the OP, this was a rig bought secondhand.

Gareth M5KVK

On 27/05/2020, 14:35, "Grant Youngman"  wrote:

Have you checked the installation of the receiver module?  Meaning that the 
two small riser modules that it plugs into are properly seated to the main RF 
board and the KRX3.  I had a dead sub-receiver problem once.  I had been in the 
radio at some point to install an update.  When reinstalling the KRX3, I had 
pinched one of the coax cables that’s in the vicinity of the riser nearest the 
front of the radio and pulled the cable out of it’s socket when reinserting the 
KRX3,  far enough not to work, but not so far that I noticed it until the next 
time I tried using the sub.

Just one more idea of something to look at.

Grant NQ5T

> On May 27, 2020, at 9:21 AM, Gareth M5KVK  wrote:
> 
> I tried that, Richard.
> ANT definitely says MAIN but still no signal.
> 
> Gareth
> 
> On 26/05/2020, 18:40, "Richard Thorne"  wrote:
> 
>Gareth,
> 
>Try this.
> 
>- Turn on the sub receiver by pushing sub
>- Push and hold B Set so the display shows b set
>- Be sure the ant shows Main and not AUX.  If it shows AUX push the 
ANT 
>button to toggle between the two.
> 
>May not be the problem but I've found for some reason my sub receiver 
is 
>on the Aux antenna.  My rig doesn't have the ant tuner either.
> 
>Rich - N5ZC
> 
>On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
>> Thanks, Richard
>> There is no ATU, so there is only the one ANT to select. However, I have 
checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU, only this or 
BNC are offered as options)
>> 
>> Gareth
>> 
>> On 26/05/2020, 16:31, "Richard Thorne"  wrote:
>> 
>> Gareth,
>> 
>> You probably don't have the correct antenna port assigned to the sub
>> receiver.  I'm not in front of my rig, but I believe you need to push
>> and hold A/B (B Set) to get to the sub receiver, at that point be 
sure
>> the correct antenna port is selected.
>> 
>> Rich - N5ZC
>> 
>> On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
>>> 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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Re: [Elecraft] Problems with KRX3A

[Grant Youngman]

Have you checked the installation of the receiver module?  Meaning that the two 
small riser modules that it plugs into are properly seated to the main RF board 
and the KRX3.  I had a dead sub-receiver problem once.  I had been in the radio 
at some point to install an update.  When reinstalling the KRX3, I had pinched 
one of the coax cables that’s in the vicinity of the riser nearest the front of 
the radio and pulled the cable out of it’s socket when reinserting the KRX3,  
far enough not to work, but not so far that I noticed it until the next time I 
tried using the sub.

Just one more idea of something to look at.

Grant NQ5T

> On May 27, 2020, at 9:21 AM, Gareth M5KVK  wrote:
> 
> I tried that, Richard.
> ANT definitely says MAIN but still no signal.
> 
> Gareth
> 
> On 26/05/2020, 18:40, "Richard Thorne"  wrote:
> 
>Gareth,
> 
>Try this.
> 
>- Turn on the sub receiver by pushing sub
>- Push and hold B Set so the display shows b set
>- Be sure the ant shows Main and not AUX.  If it shows AUX push the ANT 
>button to toggle between the two.
> 
>May not be the problem but I've found for some reason my sub receiver is 
>on the Aux antenna.  My rig doesn't have the ant tuner either.
> 
>Rich - N5ZC
> 
>On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
>> Thanks, Richard
>> There is no ATU, so there is only the one ANT to select. However, I have 
>> checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU, only this 
>> or BNC are offered as options)
>> 
>> Gareth
>> 
>> On 26/05/2020, 16:31, "Richard Thorne"  wrote:
>> 
>> Gareth,
>> 
>> You probably don't have the correct antenna port assigned to the sub
>> receiver.  I'm not in front of my rig, but I believe you need to push
>> and hold A/B (B Set) to get to the sub receiver, at that point be sure
>> the correct antenna port is selected.
>> 
>> Rich - N5ZC
>> 
>> On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
>>> 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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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks
I’m going to open the rig up and check that it’s installed properly first. Then 
it will be time to contact support.

Gareth

From: Richard Thorne 
Sent: Wednesday, May 27, 2020 2:25:04 PM
To: Gareth M5KVK 
Subject: Re: [Elecraft] Problems with KRX3A

Gareth,

Ok, it sure would have been an easy fix.

It may be time for an email to Elecraft Support if you hadn't sent them
an email already.

I hope it turns out to be an easy fix.

Rich - N5ZC

On 5/27/2020 8:21 AM, Gareth M5KVK wrote:
> I tried that, Richard.
> ANT definitely says MAIN but still no signal.
>
> Gareth
>
> On 26/05/2020, 18:40, "Richard Thorne"  wrote:
>
>  Gareth,
>
>  Try this.
>
>  - Turn on the sub receiver by pushing sub
>  - Push and hold B Set so the display shows b set
>  - Be sure the ant shows Main and not AUX.  If it shows AUX push the ANT
>  button to toggle between the two.
>
>  May not be the problem but I've found for some reason my sub receiver is
>  on the Aux antenna.  My rig doesn't have the ant tuner either.
>
>  Rich - N5ZC
>
>  On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
>  > Thanks, Richard
>  > There is no ATU, so there is only the one ANT to select. However, I 
> have checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU, only 
> this or BNC are offered as options)
>  >
>  > Gareth
>  >
>  > On 26/05/2020, 16:31, "Richard Thorne"  wrote:
>  >
>  >  Gareth,
>  >
>  >  You probably don't have the correct antenna port assigned to the 
> sub
>  >  receiver.  I'm not in front of my rig, but I believe you need to 
> push
>  >  and hold A/B (B Set) to get to the sub receiver, at that point be 
> sure
>  >  the correct antenna port is selected.
>  >
>  >  Rich - N5ZC
>  >
>  >  On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
>  >  > 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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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

I tried that, Richard.
ANT definitely says MAIN but still no signal.

Gareth

On 26/05/2020, 18:40, "Richard Thorne"  wrote:

Gareth,

Try this.

- Turn on the sub receiver by pushing sub
- Push and hold B Set so the display shows b set
- Be sure the ant shows Main and not AUX.  If it shows AUX push the ANT 
button to toggle between the two.

May not be the problem but I've found for some reason my sub receiver is 
on the Aux antenna.  My rig doesn't have the ant tuner either.

Rich - N5ZC

On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
> Thanks, Richard
> There is no ATU, so there is only the one ANT to select. However, I have 
checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU, only this or 
BNC are offered as options)
> 
> Gareth
> 
> On 26/05/2020, 16:31, "Richard Thorne"  wrote:
> 
>  Gareth,
> 
>  You probably don't have the correct antenna port assigned to the sub
>  receiver.  I'm not in front of my rig, but I believe you need to push
>  and hold A/B (B Set) to get to the sub receiver, at that point be 
sure
>  the correct antenna port is selected.
> 
>  Rich - N5ZC
> 
>  On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
>  > 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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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks for that extra instruction. The manual omits the ‘Tap  MENU to exit 
MENU’ instruction, so I was looking for SYN on the config menu.

Makes no difference though, the values for SYN1 and SYN2 are OK, but there’s no 
signal from the SUB.

Gareth

From: w4sc 
Date: Tuesday, 26 May 2020 at 21:45
To: "gareth.m5...@gmail.com" 
Subject: Re: [Elecraft] Problems with KRX3A

To ckeck KSYN3

HOLD  CONFIG
VFO-B to TECH-MD
VFO-A to turn TECH-MD  ON
Tap  MENU to exit MENU
Rotate VFO-B   (usually cw)  until SYN1  ..SYN2 are shown in display  if OK,,, 
“OK” displays

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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Re: [Elecraft] Problems with KRX3A

[Gareth M5KVK]

Thanks, Richard
There is no ATU, so there is only the one ANT to select. However, I have 
checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU, only this or 
BNC are offered as options)

Gareth

On 26/05/2020, 16:31, "Richard Thorne"  wrote:

Gareth,

You probably don't have the correct antenna port assigned to the sub 
receiver.  I'm not in front of my rig, but I believe you need to push 
and hold A/B (B Set) to get to the sub receiver, at that point be sure 
the correct antenna port is selected.

Rich - N5ZC

On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
> 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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Re: [Elecraft] Problems with KRX3A

[Richard Thorne]

Gareth,

You probably don't have the correct antenna port assigned to the sub 
receiver.  I'm not in front of my rig, but I believe you need to push 
and hold A/B (B Set) to get to the sub receiver, at that point be sure 
the correct antenna port is selected.


Rich - N5ZC

On 5/26/2020 10:05 AM, Gareth M5KVK wrote:

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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[Elecraft] Problems with KRX3A

[Gareth M5KVK]

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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