Re: [Elecraft] KX2 not remembering Mic gain setting on ADATA

[Gareth M5KVK]

It appears the problem is more deep-seated.

I’m away /P right now and decided to do some FT8 using a Raspberry Pi. I set up 
the Tx drive (seemingly) OK, by pressing Tune on WSJT-X and adjusting Tx level 
and Mic gain to get the right amount of ALC.
However, when I then try to Tx again, TX LED lights but there is no drive. A 
Very slight nudge of the MIC gain causes 5-bars on the display, but next time I 
Tx it’s back to no drive.

Has anybody else experienced this?

Gareth

From: Gareth M5KVK 
Date: Saturday, 10 July 2021 at 14:53
To: "elecraft@mailman.qth.net" 
Subject: Trouble using MH3 microphone with KX2

Hi all
I’ve typically been using my MH3 with a KX3 for /P operating from my campervan. 
This last week I’ve been doing some SOTA activations, so I’ve been using my KX2 
instead.

I noticed a couple of issues when setting the Mic gain.

I followed the advised procedure and reduced PWR=0, TX CMP=0, squeezed the PTT 
and spoke normally into the MH3. I found that there was no indication at all on 
the ALC meter until at about MIC=65, ALC jumped to 6-7. Mic bias is on.

I also noticed on a few occasions that when operating, pressing PTT had no 
effect until I slightly increased the MIC gain.

The MH3 works fine on my KX3, so I’m assuming the MH3 is OK, but I can’t figure 
where the problem lies.

73

Gareth – M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] Suggested slight modification to the AX1

[Gareth M5KVK]

I’ve been using the AX1 for my SOTA activations. Lovely job, but I’ve made a 
slight mod to make it easier.

All I’ve done is make a small loop in the end of the counterpoise wire so that 
I can peg it out. It’s just big enough for the peg to fit though, and is then 
wrapped a couple of times and held in place with yellow shrink wrap (to make 
the end more visible).

I know it makes the counterpoise a bit shorter, but I’ve not noticed any 
problem.

73

Gareth – M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] Trouble using MH3 microphone with KX2

[Gareth M5KVK]

Hi all
I’ve typically been using my MH3 with a KX3 for /P operating from my campervan. 
This last week I’ve been doing some SOTA activations, so I’ve been using my KX2 
instead.

I noticed a couple of issues when setting the Mic gain.

I followed the advised procedure and reduced PWR=0, TX CMP=0, squeezed the PTT 
and spoke normally into the MH3. I found that there was no indication at all on 
the ALC meter until at about MIC=65, ALC jumped to 6-7. Mic bias is on.

I also noticed on a few occasions that when operating, pressing PTT had no 
effect until I slightly increased the MIC gain.

The MH3 works fine on my KX3, so I’m assuming the MH3 is OK, but I can’t figure 
where the problem lies.

73

Gareth – M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ghyoung...@gmail.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to gareth.m5...@gmail.com 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Antenna Routing

[Gareth M5KVK]

Thanks, Mike
It's a K3S, so it has the upgraded KSYN3As

Gareth, M5KVK

On 28/05/2020, 18:29, "Mike Harris"  wrote:

Did I read at some stage that you do not have the internal ATU? That 
being so you will not have selectable ANT 1 or ANT 2. That being the 
case you will only have AN1 1 (the main RX/TX antenna) or the Aux RF 
antenna available to you for the Sub RX. You can forget all the ANT 1 or 
ANT 2 stuff because you don't have an ANT 2 available.

With the SUB RX activated (tap SUB) and hold B SET which will then be 
displayed on the main display tapping the ANT button will toggle between 
Main and AUX. If you want the sub RX to listen on the same antenna as 
the main RX this should be set to MAIN.

For now forget RX ANT, just make sure the RX indicator is not showing on 
the main display (immediately under the third digit of the main 
frequency display).

This is the simple starting point. We are looking simply at Fig 1.

Is the K3 upgraded to the new synths? Probably not, however, old or new 
they both, and you need two, have to be the same, not mixed.

How are we doing?

Regards,

Mike VP8NO

On 28/05/2020 12:52, Gareth M5KVK wrote:
> Thanks for that, Mike. It seems to confirm my belief about what the 
CONFIG KRX3 option does.
> 
> However, I am not getting the behaviour expected from the description:
> 
> 
> Selecting The Main Receiver Antenna
> 
> Tap ANT to select ANT 1 or ANT 2. To select the receive antenna (RX ANT 
IN), tap RX ANT. The RX icon will turn on. You’ll still be able to tap ANT to 
select ANT 1 or ANT 2 for use with the transmitter.
> 
> Selecting The Subreceiver Antenna
> 
> Normally, the antenna icons (RX and ANT 1 - 2) show which antenna is in 
use by the main receiver. To see which antenna is selected for the subreceiver, 
hold BSET . BSET will appear on the VFO A display.
> While in BSET mode, the RX ANT switch is used to select the subreceiver’s 
auxiliary RF input (RX icon on). If the RX icon is off, the subreceiver is 
sharing the main receiver’s RF source. In either case, the ANT 1 - 2 icons will 
show which KAT3 antenna is available for use by the subreceiver. If sharing, it 
will be the same antenna in use by the main receiver. If not sharing, it will 
be the non-transmit antenna.
> 
> Tapping ANT while in BSET will switch antennas on the KAT3, affecting 
which antenna is in use by both the main and subreceivers, as well as the 
transmitter. When you exit BSET, look at the antenna icons to verify that any 
expected change in the settings for the main receiver has occurred.
> 
> 
> Selecting the main RX ANT works as expected. (I use a Mag Loop as an Rx 
Ant). However, I do not see the expected behaviour for the SUB.
> 
> If I hold BSET and tap RX ANT, the MAIN Rx ANT changes, not the SUB Rx 
ANT. I can't find a way to set the Rx icon when I am in BSET mode.
> 
> Gareth, M5KVK
> 
> On 28/05/2020, 16:11, "Mike Harris"  wrote:
> 
>  Hi Gareth,
> 
>  You might find the attached useful. It is a description of all the K3
>  antenna routing options, the complete Monty, basic to full house.
> 
>  Regards,
> 
>  Mike VP8NO
> 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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

[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
> Home: 
https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435%7C1%7C0%7C637262745056307492&sdata=Uo54AiGfy1m5ISLWyMpnApNSzZBOYfX25kdNs0mztTI%3D&reserved=0
> Help: 
https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435%7C1%7C0%7C637262745056307492&sdata=F74Vsiv1DxRfd9JHksPBhSXL17%2F4s0egq3SUy%2BetNlY%3D&reserved=0
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: 
https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435%7C1%7C0%7C637262745056307492&sdata=fg97KwBCsPu7v4bPQHXb1OXSF5s%2FGXcz0TSMgsXsNFo%3D&reserved=0
> Please help support this email list: 
https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435%7C1%7C0%7C637262745056307492&sdata=N0AqFb%2BOe

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
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to n...@widomaker.com 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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
>>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net<mailto:Elecraft@mailman.qth.net>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ghyoung...@gmail.com<mailto:ghyoung...@gmail.com>

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Pos

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
>> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ghyoung...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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
>  >
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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
> 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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 for Windows 10

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

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

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[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
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] Using the KAT-500 and KPA-500 with Icom rigs

[Gareth M5KVK]

This has just come up in my RSS feed.
https://kg3v.com/2018/12/24/using-the-elecraft-kpa-500-and-kat-500-with-icom-rigs-part-i/

I’ve not seen this being discussed on this list, so perhaps somebody with
knowledge could help the OP out.

Happy Christmas

-- 
Gareth M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] TX EQ settings for Contesting

[Gareth M5KVK]

I started with the settings on Walt Underwood’s (K6WRU) page 
https://observer.wunderwood.org/2015/09/09/transmit-audio-and-compression-with-the-elecraft-kx3/#content
 
<https://observer.wunderwood.org/2015/09/09/transmit-audio-and-compression-with-the-elecraft-kx3/#content>.
 I consistently get good audio reports with DX and contesting.

Gareth - M5KVK

> On 19 Nov 2018, at 14:57, John Simmons  wrote:
> 
> The K3 TX EQ works better if you cut, rather than amplify. Start off by 
> cutting everything below 500 Hz all the way down. Then experiment with 
> boosting the 1500 Hz and above. Having someone listen that is close by is a 
> big help.
> 
> -John NI0K
> 
> Dauer, Edward wrote on 11/19/2018 8:50 AM:
>> I posted a question on the MHDXA site this morning, asking how calling 
>> stations distinguish themselves in pileups in SSB contests, where shifting 
>> frequency isn’t possible, other than by selective timing.  The answers were 
>> to shift the transmitted audio frequency curve upwards.  One suggested 
>> having a high-pitched YL record the call for a DVR.
>> 
>> Assuming that advice is tactically sound, what settings on a K3 would those 
>> in the know recommend?
>> 
>> That question comes from my just having worked the SSB SS contest, my first 
>> SSB contest since being licensed many many many moons ago.  The 
>> K3/P3/K-Pod/KPA all performed flawlessly.  Worked every US section – except 
>> my own (Colorado).  Is it possible to claim credit for a QSO selfie?
>> 
>> Thanks, as always,
>> 
>> Ted, KN1CBR
>> 
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to jasimm...@pinewooddata.com
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to gareth.m5...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Win4k3suite support

[Gareth M5KVK]

Hi
Where does one go for support on Win4k3suite? I want to start using the pan 
adapter but I have an RSPDuo rather than RSP1 and it doesn’t seem to work with 
Win4k3suite. All I get is an empty waterfall.

Gareth M5KVK
gareth.m5...@gmail.com



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] OT: An interesting view of IPC-610

[Gareth M5KVK]

I noted a reference to IPC-610 in a recent thread on soldering. I thought
readers might be interested in an 2011 article that takes a caustic view of
IPC-610.

TLDR: The work-inspect-rework mantra of IPC-610 is a recipe for reducing
the reliability of assemblies: mainly due to heat stress caused by manual
soldering being a higher-temperature operation that flow-soldering.

You can read the article at
https://www.assemblymag.com/blogs/14-assembly-blog/post/89217-the-curse-of-ipc-a-610-and-ipc-j-std-001

-- 
Gareth M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Augment KX3 or buy K3?

[Gareth - M5KVK]

Hi all
I am in the fortunate position of having some money to spend upgrading my
station; however I'm torn between two options.

I have a KX3 which I love and use a lot as a base station and also for
SOTA. Generally, I operate with 5W max but there are occasions where I'd
really like more power: but no more than 100W.

My options at present seem to be:
1) Reserve the KX3 for SOTA and buy a K3S, (but nothing more I only have
enough for a K3S)
2) Add a KXPA100 with ATU (and maybe a PX3) instead.

If this were you with money burning a hole in your pocket, which of these
two options would you go for?

73, Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Elecraft K2 7615

[Gareth - M5KVK]

Heh Aaron
I'm really sorry you've had a bad experience. I too was pushed to the limit
constructing the K2, but I'm glad I persisted.

Luckily, you are in the best place to get support. I know that others more
experienced will be along to help you.

Hang in there.

73
Gareth, M5KVK

On Sunday, September 6, 2015, Aaron Scott  wrote:

> I bought the Elecraft K2 # 7615.
> I'm just wondering if I could send the unit back and just cut my losses on
> it. I have it assembled except for the SSB  Module. For the past couple of
> months I have been trying to align the unit. Every single step of the
> process has been a battle. I have received help from the Elecraft Email
> subscription but I am just tired of fighting with it. I have gone over all
> of the solder point and made sure that they are good along with the
> components being inserted correctly, I also had electronic engineers go
> over it. I just can't get it to work. I can get it to generate a tone for
> the tone generator test but that is as far as I can get. I'm at the point
> that if I can't get Elecraft to look at it, then I'm just going to dump it
> in the trash and sign my thousand bucks that I have invested in it as a
> loss and try to save up for another radio. I don't know what else to do. I
> am really tired of fighting with it and it has become and object of
> frustration instead of a way to communicate with the world.
> Please Help
>
> Aaron SCOTT K5ATG
> 2108 Turner dr
> Midwest City, OK 73110
>
> --
> '73
> Aaron Scott
> K5ATG <http://k5atg.blogspot.com/>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net 
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to gareth.m5...@gmail.com 
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] [K2] Setting audio drive level when using VOX

[Gareth M5KVK]

Aah, that would explain it.
Nomatter, I’ll connect up the CAT and use that.

Thanks, Don
73

Gareth - M5KVK
gareth.m5...@gmail.com
m5...@m5kvk.org



> On 18 Aug 2015, at 12:30, Don Wilhelm  wrote:
> 
> Gareth,
> 
> The VOX on the K2 is the weak point in the KSB2 design.  You will be better 
> off using PTT on the K2.
> A simple "one transistor keying" circuit can be added to the serial port RTS 
> or DTR (which depends on your software) to trigger the K2 PTT will give you 
> reliable operation.
> 
> 73,
> Don W3FPR
> 
> On 8/18/2015 4:49 AM, Gareth - M5KVK wrote:
>> Hi
>> I think I may have a problem somewhere in my audio chain. I say may because
>> what I'm seeing may be correct: I'm not sure.
>> 
>> I have a Windows 7 PC running DM780 with a Tascam US2X2 connected via a
>> 20dB pad (10k/1k) to the Mic connector on the K2. I am using VOX, so
>> there's no other connection.
>> 
>> When I increase the Line Out on the Tascam to point at which the VOX
>> operates, I immediately see one bar on the ALC. The bar is pretty steady:
>> maybe very slight flashing. Regardless of further Line Out increases, I
>> never see more than one bar.
>> 
>> I understood that the drive level should be adjusted to the point of one
>> bar ALC and then backed off slightly so that ALC is only flashing
>> occasionally. If I back off even slightly, the VOX drops out.
>> 
>> Is this an artifact of the VOX? i.e. the VOX activation level is too high?
>> Is it an indication that the 20dB pad is too high? Or is this normal and I
>> just adjust Line Out until the VOX opens and then leave it there: even
>> though one bar of ALC is on.
>> 
>> 
> 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [K2] Setting audio drive level when using VOX

[Gareth - M5KVK]

Hi
I think I may have a problem somewhere in my audio chain. I say may because
what I'm seeing may be correct: I'm not sure.

I have a Windows 7 PC running DM780 with a Tascam US2X2 connected via a
20dB pad (10k/1k) to the Mic connector on the K2. I am using VOX, so
there's no other connection.

When I increase the Line Out on the Tascam to point at which the VOX
operates, I immediately see one bar on the ALC. The bar is pretty steady:
maybe very slight flashing. Regardless of further Line Out increases, I
never see more than one bar.

I understood that the drive level should be adjusted to the point of one
bar ALC and then backed off slightly so that ALC is only flashing
occasionally. If I back off even slightly, the VOX drops out.

Is this an artifact of the VOX? i.e. the VOX activation level is too high?
Is it an indication that the 20dB pad is too high? Or is this normal and I
just adjust Line Out until the VOX opens and then leave it there: even
though one bar of ALC is on.

73, Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [KX3} Charging internal batteries

[Gareth - M5KVK]

Seems like there's a bit of a battery theme at the moment.

I ahave the KXBC3 intalled with some Eneloop batteries. I notice that when
I plug in the external PSU, the internal battery level increases: even
though I'm not charging.

Does this imply that just having the external PSU connected causes some
charge to go into the internal batteries, or does one always have to use
the internal charger?

73
Gareth, M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K2 Filter settings

[Gareth - M5KVK]

I realise this is close to becoming an obsession, but I really want to
understand what's going on.

Once I'd gone through my modified version of Wayne's process for adjusting
the VCO (i.e. adjusting the VFO to have the WWV 100Hz sub-carrier on
100Hz), I realised that this applied only to LSB FIL1. As soon as I
switched to FIL2, the sub-carrier moved and I needed to use CAL FIL to
adjust it back.

Also, if you want to move the position of the filter in the audio spectrum
(e.g. to change where the skirts are), and thus change the BFO; you need to
run Wayne's process again.

Is that right?

73, Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Using CAL FIL and Spectrogram to set up the K2 filters

[Gareth - M5KVK]

Having finally got my KSB2 board working (it was a hi-resistance solder joint: 
enough to depress performance but not stop all signals), and calibrated the 
dial, I turned to setting up the filters.

I started with the filter widths and BFO settings in the KSB2 manual, but it 
didn't sound right. So I decided to use WWV and Spectrogram.

Now that I knew that the VFO was OK, I set it to 1.00. No audio on LSB or 
USB, which is good.
I then tuned off by 600Hz to create a steady signal at 1.60kHz (.40kHz 
on the other sideband) and displayed the audio on spectrogram with a 600Hz 
marker set.
I then went through CAL FIL, adjusting the BFO so that the audio tone was 
exactly 600Hz.

I did this on all modes and filter widths: except FL4 on LSB and USB, which I 
adjusted for a 1000Hz centre (so I can use them for PSK31).

I was surprised how far off the displayed spectrum was with the factory 
settings. On USB FL4, the centre was at 400Hz with the manual’s suggested BFO 
setting.

73, Gareth M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [K2] Confused when calibrating 4MHz oscillator

[Gareth - M5KVK]

I know this has been done to death on here, but I'm confused.

I'm following Wayne's procedure to calibrate the 4MHz oscillator. I'm using
Radio China International on 9600kHz. By comparing the Rx audio on the K2
with that received on another receiver, I see that the Dial f on the K2 is
9600.44kHz.

Now, according to Wayne's instructions, I adjust C22 whilst comparing TP1
and TP2.

Now,the audio pitch, and thus my subjective comparison of the correct
frequency, is being determined partly by the BFO frequency isn't it? So,
surely this approach is flawed?

What am I missing?

Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [K2] Looking for a UK based expert to debug KSB2

[Gareth - M5KVK]

OK, I have to admit defeat. I can't see what's wrong with the KSB2 board I
built for my K2. I need somebody with more skill than I to take a look.

I'd prefer somebody in the UK, simply because of shipping costs.

If there is somebody who would be willing to put my board in their own K2
and work out what the problem is, please email me direct at M5KVK at M5KVK
dot ORG.

I'll send them the board to take a look and,hopefully, get it working. I'll
pay reasonable costs of course.

73 Gareth, M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] KUSB2 Problem Continued

[Gareth - M5KVK]

K2 S/N 03885

Symptoms: low power and no ALC action when on SSB.

CW
With E= 13.0V on the K2 display, if I transmit CW into a dummy load PWR=10
gets me 10W according to my un-calibrated power meter and draws 2.3A (40m).

SSB
If I inject 1kHz sinewave into the Mic socket, for 100mV pp i/p I see about
6W out. Current varies between 1.9 and 2.2A and E comes down to 12.5 under
load.

Interestingly, there's zero action on the bargraph in ALC mode.

Needing 100mV to get 60% of set power seems high. I thought I should get
100% with 50mV. Even with 1.6V pp i/p, I only see 8W o/p

73 Gareth
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] [K2] How much AF volts at 1kHz to get full RF power using KSB2?

[Gareth - M5KVK]

Don, Jim
Thanks. I finally got there. Once I removed the Mic from the chain, the
problem disappeared. With 150mV RMS @ 1kHz, I got just over 4W when the rig
was set to deliver 5W. Close enough for me.

The problem is that the fist Mic I use (Icom MH36) and my Heil Proset 5 are
both low output Mics. I'll get an Elecraft MH2 and put a pre amp in the Pro
Set's line.

73, Gareth

On 6 October 2014 21:56, Don Wilhelm  wrote:

> Gareth,
> You should find between 200 and 400 mV peak to peak (dependent on the
> particular speech patterns) from an electret microphone such as the
> Elecraft MH2.  That is 70 to 140 mV RMS.
> That is sufficient to drive the SSB output to pull power.
>
> 73,
> Don W3FPR
>
>
> On 10/6/2014 3:57 PM, Gareth - M5KVK wrote:
>
>> I want to remove the Mic as a source of variability but I don’t know what
>> AF voltage should cause 100% of the set o/p power.
>>
>>
>>
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] [K2] How much AF volts at 1kHz to get full RF power using KSB2?

[Gareth - M5KVK]

I’m rapidly getting nowhere with this problem. I need to understand how the
overall circuit works and what I should expect to see on the ‘scope.

My understanding is that RF Power is basically under the control of a
feedback loop controlled by the VRFDET circuit on the RF board.

The front panel PWR OUT is simply an input to Control Board U8, which
generates V PWR via U8. V PWR sets the target level in the ALC block and
affects V ALC. V ALC goes to Q24 and controls the o/p level of the BFO,
which then flows through filters etc to the PA, where VREFDET is generated.

In CW mode, that’s all there is, and it works. Varying PWR OUT varies the
RF power generated. The problem comes in SSB mode.

With the KSB2 installed, and in CW mode, the BFO signal goes in and out of
the KSB2 via Q3. All OK. In SSB mode, the KSB2 has an additional ALC
circuit block that uses VRFDET, ALC THR and PWR CTRL to throttle the SSB
generated on the KSB2 which then goes back out via Q2. This doesn’t work.

In SSB mode, the AF mixes in the balanced modulator but changing PWR OUT
has no effect. If my understanding is correct, the problem would seem to
lie in one of two places: a) the ALC circuit block on the KSB2 or b) the AF
compressor circuit.

I want to remove the Mic as a source of variability but I don’t know what
AF voltage should cause 100% of the set o/p power.

73

Gareth - M5KVK

On 1 October 2014 22:10, Gareth - M5KVK  wrote:

> Thanks for the help Don.I really appreciate it.
> Apart from finding that R7 was not fitted (how many times had I looked at
> the board?), I can see nothing untoward. Fitting it made no difference.
>
> I note that these were the ones changed in the Rev E errata. Relevant?
> Mine is a Rev D board and (e.g.) R9 is 10k rather than 3.9k as per the Rev
> D manual.
>
> The receive audio is slightly down with OP1 but not a lot. Diodes are all
> the right way around and T2 appears to be OK, no shorts and buzzes through
> OK.
>
> I did see a suspicious poor solder joint with R69 on the RF board, but
> again it made no difference.
>
> On 1 October 2014 18:16, Don Wilhelm  wrote:
>
>>  Gareth,
>>
>> The PWR CTRL on the KSB2 does not do much at all, so what you are seeing
>> is about right.
>> The power control is done from the VRFDET feeding the base of Q1.  It
>> causes Q1 to conduct and alters the voltage to the base of Q2.  The SSB
>> signal is 'throttled' after the signal is generated and passed through the
>> OP1 filter.  The BFO injection should not change for SSB operation like it
>> does for CW mode.
>>
>> Check resistors R4 and R9 for proper values and good soldering.  Check
>> the orientation of D2.
>>
>> If you are still not getting adequate signal at D4, then you may have a
>> problem with T2 or a solder bridge on one of the capacitors in the filter
>> area that is dragging the signal down.
>> How does the OP1 filter behave in receive.  If the RX signal is
>> attenuated more than with the variable filter, that problem may be related
>> to your TX problem.
>>
>> The VRFDET signal level is a level determined by the actual power output
>> of the K2 - it comes from the wattmeter forward power detection in either
>> the KAT2 or the KPA100 - without either of those options, it comes from the
>> RF Detector D9 on the RF Board.
>>
>> 73,
>> Don W3FPR
>>
>>
>> On 10/1/2014 11:17 AM, Gareth - M5KVK wrote:
>>
>> Don, Yes, D4 seems to be OK
>>
>> I've done some further probing and I'm wondering if the problem lies in
>> the ALC circuit. Basically, the power doesn't vary as I change the POWER
>> control.
>>
>>  Scoping U2. There is data on pin 8, but only the second nibble changes.
>> ALC THR goes up as I change POWER, but PWR CTRL stays stuck at about 5.6V
>> regardless of where POWER is set or what AF there is.
>>
>>  What is the purpose of PWR CTRL? Should it be changing?
>>
>>  Gareth - M5KVK
>>
>> On 29 September 2014 21:45, Don Wilhelm  wrote:
>>
>>> Gareth,
>>>
>>> Is D4 mounted with the correct orientation. - the line on the silkscreen
>>> points to the cathode end.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>>
>>> On 9/29/2014 4:16 PM, Gareth - M5KVK wrote:
>>>
>>>> Thanks, Don
>>>> I'm getting more or less the same as you except for the RF out on U5
>>>> pin 4.
>>>> I'm seeing the BFO of about 400mV pp with no AF, and then going up to
>>>> 800mV
>>>> pp when I whistle into the Mic.
>>>>
>>>> Doh!
>>>>
>>>> I thought I had the carrier bal

Re: [Elecraft] [K2] How much AF volts at 1kHz to get full RF power using KSB2?

[Gareth - M5KVK]

Thanks, Don
I'm getting more or less the same as you except for the RF out on U5 pin 4.
I'm seeing the BFO of about 400mV pp with no AF, and then going up to 800mV
pp when I whistle into the Mic.

Doh!

I thought I had the carrier balance right, but obviously not. Switching on
the SSBA=BAL shows a bif signal on U5 pin 4. I've adjusted that down to
almost zero on the 'scope, but I'm still not getting much RF out.
73,
Gareth, M5KVK

On 29 September 2014 16:38, Don Wilhelm  wrote:

> Gareth,
>
> During transmit you should have about 1.4 volts DC on pin 1 or the
> balanced modulator U5.
> I just measured the U5 pin 1 audio using a 'scope with a 10X probe and
> found the peak to peak voltage ranged from 200 to 400 millivolts.  If you
> have a good microphone, you should see a similar amplitude signal.  The RF
> output at U5 pin 4 should have a similar amplitude.
> The BFO injection at U5 pin 6 should be greater than 200 millivolts peak
> to peak and on the one I just measured there was a 1 volt BFO signal there.
>
> 73,
> Don W3FPR
>
> On 9/29/2014 4:52 AM, Gareth - M5KVK wrote:
>
>> I have K2 serial no 03885. I've recently finished building the KSB2 SSB
>> adapter, but I'm having problems getting it to work.
>>
>> The problem is very low output power when I speak into the mic. I'm using
>> an Icom MK36 mic and I've set the P1 header as per the KSB2 manual;
>> including the resistor to get Mic bias.
>>
>> The options as set SSBA = 2, SSBC = 2-1 and I've done the carrier balance.
>>
>>
>>
>> I've checked all the DC voltages and they are OK. I used a scope on U5
>> (NE602) and there is an enormous disparity between the voltages on pin 6
>> (hi) and on pin 1 (very low). The waveform on U3 pin 7 (the compressed AF
>> out) is greater than that on pin 4, (the AF input), but not by much.
>>
>> I want to eliminate the Mic as the source of the problem (It works
>> perfectly with the IC-756 Pro II) by using an AF sig gen, but I'm not sure
>> how much AF drive should cause 100% output power.
>>
>> Gareth - M5KVK
>>
>>
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [K2] How much AF volts at 1kHz to get full RF power using KSB2?

[Gareth - M5KVK]

I have K2 serial no 03885. I've recently finished building the KSB2 SSB
adapter, but I'm having problems getting it to work.

The problem is very low output power when I speak into the mic. I'm using
an Icom MK36 mic and I've set the P1 header as per the KSB2 manual;
including the resistor to get Mic bias.

The options as set SSBA = 2, SSBC = 2-1 and I've done the carrier balance.

On 7MHz, LSB, with the power set to 1W, when I "tune" the rig into a dummy
load I get 1W, but when I talk or whistle into the Mic, the most I can get
is about 100mW. Nomatter how load I yell, I cannot get full output power
:-) and the bar graph hardly moves.

I've checked all the DC voltages and they are OK. I used a scope on U5
(NE602) and there is an enormous disparity between the voltages on pin 6
(hi) and on pin 1 (very low). The waveform on U3 pin 7 (the compressed AF
out) is greater than that on pin 4, (the AF input), but not by much.

I want to eliminate the Mic as the source of the problem (It works
perfectly with the IC-756 Pro II) by using an AF sig gen, but I'm not sure
how much AF drive should cause 100% output power.

Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [K2] KSB2 Filter alignment question

[Gareth - M5KVK]

K2 serial 03885 fitted with KSB Rev C board.

When I installed the KSB2 board recently, I went through the process of
setting up the BFOs as per the KSB2 manual. However, I just downloaded
Spectrogram and went through N0SS's procedure for setting up the filters.

Most of the adjusted settings were within 2-300Hz of those in the manual
(all on the higher side), but a couple were moved quite a bit. I'm
interested in others' experiences in this area.

The outliers were USB FL2 which needed to be 500Hz higher and USB FL3 which
needed to be 700Hz higher.

The main issue when looking with Spectrogram was that the USB spectrum was
far too bassy when the BFOs were set as per the manual.

Regards

Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K2 Serial 3885 I now have a working K2, thanks to you guys

[Gareth - M5KVK]

I couple of weeks ago I came on here about a VCO problem I was experiencing 
when testing the VCO on my K2. The solution was a hard resent of the K2. Since 
then, it’s been plain sailing. The only piece I “lost” after the 11 years this 
has sat in a box waiting to be built was the 20m bandpass filter trimmer 
capacitor.

I now have a working CW only K2 and the next task is to build the KSB2 and 
other options.

73, M5KVK Gareth
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] K2 VCO frequency out of range and not changing

[Gareth - M5KVK]

Don,
Apologies for the slow response: I'm doing a lot of business travel right now.
Yes, you're right, I didn't provide much information. Sorry about that.

I managed to squeeze an hour in yesterday, and measured the voltages in the 
affected area. RF Board U4 is OK, except that CLK and DIN are both inverted. I 
hadn't noticed this when tracing with a scope. CLK (pin 7) is at 5.03V, whereas 
DIN (pin 5) is at 0V. They should be at the opposite ends.

Going to the Control Board confirms these readings on U7, but that's when I ran 
out of time. I did a visual inspection of U7 and it looks OK. I may get an hour 
this evening, so I'll check U6 and U8.

Gareth
> On 2 Jul 2014, at 16:33, Don Wilhelm  wrote:
> 
> Gareth,
> 
> You did not supply much information with frequencies and voltage 
> measurements, so I have to guess a bit about what your problem may be.
> 
> Usually when the VCO frequency at TP1 does not change, you will also find 
> that the VCO voltage measured at the left end of R30 is at one of its extreme 
> voltages - either about 8 volts or about zero volts.
> 
> The solution is to either adjust L30 or adjust the turns on T5 (or both) to 
> get the frequency of the VCO into a range where the PLL can adjust it.
> 
> The easiest way I can tell you which way to move the frequency at TP1 is to 
> tell you to look at the VCO table on the Schematic Key page (the first page 
> of the schematics near the back of the manual.
> Set the frequency on the VFO dial to the low end of a band (80 meters - 3500 
> kHz is good).
> Then measure the frequency at TP1 and compare it with the VFO frequency shown 
> in the chart (for 80 meters it is 8415 kHz.
> If the frequency at TP1 is too high or too low, adjust the turns of T5 or 
> adjust L30 to bring it onto frequency.  For gross adjustment, adjust the T5 
> turns spacing, and for fine adjustment use L30.
> Note - if the frequency at TP1 is WY off, you may have a problem with the 
> capacitors or relays in the VFO Range Select area.  See the RF Board 
> schematic sheet 1.  The Schematic Key VFO chart tells you the capacitors used 
> for each band - check the value and soldering and check the soldering of 
> relays K13, K14, and K15.
> 
> Once you have the right frequency when tuned to 3500 kHz, tune to 4000 kHz 
> and measure the voltage at the left end of R30.  It should be able to be 
> adjusted to something near 6 volts, and can then proceed to check the other 
> bands as normal in the manual instructions.
> 
> 73,
> Don W3FPR
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K2 VCO frequency out of range and not changing

[Gareth - M5KVK]

Hi
I bought a K2 kit way way back; started to build it but then got distracted: 
divorce, moving, re-marrying - you get the picture:-) I’ve finally got back to 
it and have just started on Alignment 2.

All is well until I check the VCO frequency at P1. It is out of spec and 
doesn’t change when I spin the dial. The display does, but not the VCO 
frequency. 

The VCO does change when I change band.

I’ve checked through and the PLL is working, there is data in to the PLL and 
the VCXO works OK.

It all looks OK, so I’m not sure where to look next. The varactor diodes maybe?

Gareth - M5KVK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com