Date   

Re: K3 Receiver Noise Troubleshooting

Ki1g@...
 

Henk,

 

Thank you for the troubleshooting ideas.

 

I have connected the IF output to a second receiver and the noise is still present.

 

I am currently looking into how to look at the synthesizer output with a SpecAn.

 

73

Rick KI1G

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Henk PA0C
Sent: Sunday, October 25, 2020 4:21 AM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3 Receiver Noise Troubleshooting

 

Hi Rick,

 

This could be anything, but sounds like an almost broken capacitor.

 

You need to find out where in the receiver the noise is generated.

A good place to start is the IF output connector.

 

Connect a second receiver to the IF port and see if the noise is still present when tuned to approx. 8.2 MHz

In case not, it is generated in the IF, DSP chain.

If yes, most probably it is the front-end.

 

This will lead to the next, more detailed steps. 

 

You should also check the syntheser output on a spectrum analyser to see if the oscillator is "clean" or listen to it on a second rx. 

Best to see if you can use a TMP connector somewhere to tap into the signal.

 

73 Henk

PA0C

 

-------- Oorspronkelijk bericht --------

Van: "Ki1g via groups.io" <Ki1g@...>

Datum: 25-10-2020 01:45 (GMT+01:00)

Aan: Elecraft-K3@groups.io

Onderwerp: [Elecraft-K3] K3 Receiver Noise Troubleshooting

 

I have a K3 that has worked great for many years but now has a noise source somewhere in the receiver. The radio still hears stations but there is a new source of static bursts on all bands. It sounds like there is a thunderstorm in the local area with bursts on 160M peaking at S-9 +40 and on 10M they peak around S-6. When I disconnect the antenna, stations go away but the static noise remains. I have a video that I can send a video of what I am trying to describe.

I have taken the radio apart and reseated all of the connectors (some are gold and some are tin) and the problem persists.

I do not have a sub receiver installed.

I am looking for suggestions on what to try next.

Thanks  and 73
Rick KI1G


Re: 5MHz

Alan Baker
 

Hi Tim.

I've just sent you a pm with a .zip attachment. If you haven't rxed it by the time you read this, please let me know.

For the benefit of others reading this, there is a K3 Band Limits Editor to do what Tim wants.

73,

Alan. G4GNX


------ Original Message ------
From: "Tim Hague M0AFJ via groups.io" <m0afj@...>
Sent: 25/10/2020 09:58:03
Subject: [Elecraft-K3] 5MHz

Been playing with my new to me K3, was going to call in on a 5MHz CW net but the radio is blocked for the U.K. 5MHz LF allocation. Is there an easy fix for this or do I need to contact Elecraft for a firmware update?

Thanks Tim M0AFJ


5MHz

Tim Hague M0AFJ
 

Been playing with my new to me K3, was going to call in on a 5MHz CW net but the radio is blocked for the U.K. 5MHz LF allocation. Is there an easy fix for this or do I need to contact Elecraft for a firmware update?

Thanks Tim M0AFJ


Re: K3/0 direct connect to K3s within a Jeep (no Internet, no RemoteRIG). Is it feasible?

Henk PA0C
 

Hi Paul,

That should be feasible.

The only thing the Remoterig boxes do is conversion of signals, so they can be transported over the internet.
Without them you can connect all ports directly.

The schematics and interface descriptions should be the place to start.
It should be rather straight forward.

73 Henk
PA0C

-------- Oorspronkelijk bericht --------
Van: "W6PNG via groups.io" <w6png@...>
Datum: 25-10-2020 01:45 (GMT+01:00)
Aan: Elecraft-K3@groups.io
Onderwerp: [Elecraft-K3] K3/0 direct connect to K3s within a Jeep (no Internet, no RemoteRIG). Is it feasible?

I have been operating from within my Jeep and primarily from the passenger seat. I spent a lot of effort perfecting a KX3/PX3 system where two of these are mounted on my dash. https://nomadic.blog/2019/10/22/suitcase-dxpedition-so2r-why-drive-a-boring-bmw-m-series-when-you-can-have-a-ferrari/  Works great but as an SSB guy I’d like a little more oomph and hence a KPA500 enters the picture.


My question is whether its possible/feasible to direct connect a K3s to a K3/0 mini. The use case is to leave the K3s/KPA500 in the back of the Jeep and have a K3/0 mounted on the dash. I really don’t want to use the RemoteRig boxes and wondered if its feasible to do this?


Paul Gacek

W6PNG/M0SNA

www.nomadic.blog


Re: K3 Receiver Noise Troubleshooting

Henk PA0C
 

Hi Rick,

This could be anything, but sounds like an almost broken capacitor.

You need to find out where in the receiver the noise is generated.
A good place to start is the IF output connector.

Connect a second receiver to the IF port and see if the noise is still present when tuned to approx. 8.2 MHz
In case not, it is generated in the IF, DSP chain.
If yes, most probably it is the front-end.

This will lead to the next, more detailed steps. 

You should also check the syntheser output on a spectrum analyser to see if the oscillator is "clean" or listen to it on a second rx. 
Best to see if you can use a TMP connector somewhere to tap into the signal.

73 Henk
PA0C

-------- Oorspronkelijk bericht --------
Van: "Ki1g via groups.io" <Ki1g@...>
Datum: 25-10-2020 01:45 (GMT+01:00)
Aan: Elecraft-K3@groups.io
Onderwerp: [Elecraft-K3] K3 Receiver Noise Troubleshooting

I have a K3 that has worked great for many years but now has a noise source somewhere in the receiver. The radio still hears stations but there is a new source of static bursts on all bands. It sounds like there is a thunderstorm in the local area with bursts on 160M peaking at S-9 +40 and on 10M they peak around S-6. When I disconnect the antenna, stations go away but the static noise remains. I have a video that I can send a video of what I am trying to describe.

I have taken the radio apart and reseated all of the connectors (some are gold and some are tin) and the problem persists.

I do not have a sub receiver installed.

I am looking for suggestions on what to try next.

Thanks  and 73
Rick KI1G


K3/0 direct connect to K3s within a Jeep (no Internet, no RemoteRIG). Is it feasible?

W6PNG
 

I have been operating from within my Jeep and primarily from the passenger seat. I spent a lot of effort perfecting a KX3/PX3 system where two of these are mounted on my dash. https://nomadic.blog/2019/10/22/suitcase-dxpedition-so2r-why-drive-a-boring-bmw-m-series-when-you-can-have-a-ferrari/  Works great but as an SSB guy I’d like a little more oomph and hence a KPA500 enters the picture.


My question is whether its possible/feasible to direct connect a K3s to a K3/0 mini. The use case is to leave the K3s/KPA500 in the back of the Jeep and have a K3/0 mounted on the dash. I really don’t want to use the RemoteRig boxes and wondered if its feasible to do this?


Paul Gacek

W6PNG/M0SNA

www.nomadic.blog


K3 Receiver Noise Troubleshooting

Ki1g@...
 

I have a K3 that has worked great for many years but now has a noise source somewhere in the receiver. The radio still hears stations but there is a new source of static bursts on all bands. It sounds like there is a thunderstorm in the local area with bursts on 160M peaking at S-9 +40 and on 10M they peak around S-6. When I disconnect the antenna, stations go away but the static noise remains. I have a video that I can send a video of what I am trying to describe.

I have taken the radio apart and reseated all of the connectors (some are gold and some are tin) and the problem persists.

I do not have a sub receiver installed.

I am looking for suggestions on what to try next.

Thanks  and 73
Rick KI1G


Re: K3 Power Output Problem

JohnG3PQA
 

Thanks Alan, yes, I did that latterly to save time!
I will try to do more work on the rig later and report back if I find anything wrong
John


Re: K3 Power Output Problem

Alan Baker
 

John.

I'm not sure if this has been asked before, I may have missed it.

Are you sure that you don't have the power set to "Per band"? I'm not sure if that would affect the readings you're getting, but it might save you a lot of dismantling. :-)

73,

Alan. G4GNX


------ Original Message ------
From: "JohnG3PQA" <g3pqa@...>
Sent: 23/10/2020 08:31:33
Subject: Re: [Elecraft-K3] K3 Power Output Problem

Thanks Mike, Mel, Ray and David for suggestions.
Volts over 13 in all cases. Tried 13.5 but this not the problem. ATU bypassed for tests. LPA output OK at 10w all bands.
Only removed ATU so far but will check PA and LPA interconnects.
David, no, I just used the latest version of the Utility as recommended in Dec 2009 Manual using auto-cal.. I will redo cal manually each band as specified and tabulate figures. It does look like a gain control problem somewhere, I hope that is the case.
73
John


Re: K3 Power Output Problem

JohnG3PQA
 

Thanks Mike, Mel, Ray and David for suggestions.
Volts over 13 in all cases. Tried 13.5 but this not the problem. ATU bypassed for tests. LPA output OK at 10w all bands.
Only removed ATU so far but will check PA and LPA interconnects.
David, no, I just used the latest version of the Utility as recommended in Dec 2009 Manual using auto-cal.. I will redo cal manually each band as specified and tabulate figures. It does look like a gain control problem somewhere, I hope that is the case.
73
John


Re: K3 Power Output Problem

David G3YYD
 

John

Have you redone the 5 and 50 watt calibration on each band? See manual. 

73 David G3YYD 

On 23 Oct 2020 03:21, Mike Flowers <mike.flowers@...> wrote:

Hi John,

 

What input VDC does the K3 report during TX over 50W?

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of JohnG3PQA
Sent: Thursday, October 22, 2020 19:19
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] K3 Power Output Problem

 

I would appreciate some help fixing an unusual power anomoly on the K3 (2481) I am using. It gives the normal 100w output into a dummy load on HF bands but only 70watts maximum on 1.8 and 3.5MHz, and 80w on 50MHz.
L10 and C10 in KAT3 ATU bypassed as recommended by Elecraft.
No problem with K3 Utility TX gain tests, perhaps because the problem is over 50w. On 1.8 and 3.5MHz the power control operates normally up to 60w but then appears to fold- back, with limit at 70 or 75w. on those bands.
The LPA set to 10w gives 10w output on all bands.
PSU volts at transceiver are normal, 13.0 v on load. When increased to 13.5 on the K3 bar graph there is little improvement in output, in any case there is no problem on 7MHz - 30MHz..
Has anyone seen this problem before?
Any suggestions as to why the power should be limiting on the 3 bands only would be very welcome.
Thanks
John



Re: K3 Power Output Problem

Ray Maxfield
 

Hi John….

Run a Power output test on 160- 10 meters with the Antenna Tuner Shut off / Disabled.

From previous post, Clean ALL interconnects in the RF Stages of the K3,

Boards… K3LPA and KPA3.

Ray WA6VAB   K3- #3824

 

 

From: Mel Marcus
Sent: Thursday, October 22, 2020 7:52 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3 Power Output Problem

 

John

 

I am not sure if you are aware that under 12W you are using a different board than when you run over 13 W

 

Mel

NE9A

-------- Original Message --------
Subject: Re: [Elecraft-K3] K3 Power Output Problem
From: "Mike Flowers" <mike.flowers@...>
Date: Thu, October 22, 2020 9:21 pm
To: <Elecraft-K3@groups.io>

Hi John,

 

What input VDC does the K3 report during TX over 50W?

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of JohnG3PQA
Sent: Thursday, October 22, 2020 19:19
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] K3 Power Output Problem

 

I would appreciate some help fixing an unusual power anomoly on the K3 (2481) I am using. It gives the normal 100w output into a dummy load on HF bands but only 70watts maximum on 1.8 and 3.5MHz, and 80w on 50MHz.
L10 and C10 in KAT3 ATU bypassed as recommended by Elecraft.
No problem with K3 Utility TX gain tests, perhaps because the problem is over 50w. On 1.8 and 3.5MHz the power control operates normally up to 60w but then appears to fold- back, with limit at 70 or 75w. on those bands.
The LPA set to 10w gives 10w output on all bands.
PSU volts at transceiver are normal, 13.0 v on load. When increased to 13.5 on the K3 bar graph there is little improvement in output, in any case there is no problem on 7MHz - 30MHz..
Has anyone seen this problem before?
Any suggestions as to why the power should be limiting on the 3 bands only would be very welcome.
Thanks
John

 


Re: K3 Power Output Problem

Mel Marcus
 

John

I am not sure if you are aware that under 12W you are using a different board than when you run over 13 W

Mel
NE9A

-------- Original Message --------
Subject: Re: [Elecraft-K3] K3 Power Output Problem
From: "Mike Flowers" <mike.flowers@...>
Date: Thu, October 22, 2020 9:21 pm
To: <Elecraft-K3@groups.io>

Hi John,
 
What input VDC does the K3 report during TX over 50W?
 
- 73 and good DX de Mike, K6MKF, NCDXC Secretary
 
From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of JohnG3PQA
Sent: Thursday, October 22, 2020 19:19
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] K3 Power Output Problem
 
I would appreciate some help fixing an unusual power anomoly on the K3 (2481) I am using. It gives the normal 100w output into a dummy load on HF bands but only 70watts maximum on 1.8 and 3.5MHz, and 80w on 50MHz.
L10 and C10 in KAT3 ATU bypassed as recommended by Elecraft.
No problem with K3 Utility TX gain tests, perhaps because the problem is over 50w. On 1.8 and 3.5MHz the power control operates normally up to 60w but then appears to fold- back, with limit at 70 or 75w. on those bands.
The LPA set to 10w gives 10w output on all bands.
PSU volts at transceiver are normal, 13.0 v on load. When increased to 13.5 on the K3 bar graph there is little improvement in output, in any case there is no problem on 7MHz - 30MHz..
Has anyone seen this problem before?
Any suggestions as to why the power should be limiting on the 3 bands only would be very welcome.
Thanks
John


Re: K3 Power Output Problem

Mike Flowers
 

Hi John,

 

What input VDC does the K3 report during TX over 50W?

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of JohnG3PQA
Sent: Thursday, October 22, 2020 19:19
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] K3 Power Output Problem

 

I would appreciate some help fixing an unusual power anomoly on the K3 (2481) I am using. It gives the normal 100w output into a dummy load on HF bands but only 70watts maximum on 1.8 and 3.5MHz, and 80w on 50MHz.
L10 and C10 in KAT3 ATU bypassed as recommended by Elecraft.
No problem with K3 Utility TX gain tests, perhaps because the problem is over 50w. On 1.8 and 3.5MHz the power control operates normally up to 60w but then appears to fold- back, with limit at 70 or 75w. on those bands.
The LPA set to 10w gives 10w output on all bands.
PSU volts at transceiver are normal, 13.0 v on load. When increased to 13.5 on the K3 bar graph there is little improvement in output, in any case there is no problem on 7MHz - 30MHz..
Has anyone seen this problem before?
Any suggestions as to why the power should be limiting on the 3 bands only would be very welcome.
Thanks
John


K3 Power Output Problem

JohnG3PQA
 

I would appreciate some help fixing an unusual power anomoly on the K3 (2481) I am using. It gives the normal 100w output into a dummy load on HF bands but only 70watts maximum on 1.8 and 3.5MHz, and 80w on 50MHz.
L10 and C10 in KAT3 ATU bypassed as recommended by Elecraft.
No problem with K3 Utility TX gain tests, perhaps because the problem is over 50w. On 1.8 and 3.5MHz the power control operates normally up to 60w but then appears to fold- back, with limit at 70 or 75w. on those bands.
The LPA set to 10w gives 10w output on all bands.
PSU volts at transceiver are normal, 13.0 v on load. When increased to 13.5 on the K3 bar graph there is little improvement in output, in any case there is no problem on 7MHz - 30MHz..
Has anyone seen this problem before?
Any suggestions as to why the power should be limiting on the 3 bands only would be very welcome.
Thanks
John


Re: Elecraft K3S - DVR problems

Keith_WE6R
 

Hi Joe;
KDVR3 FW 2.05 was released in Aug 2019 (your rig was prior). It is current as of today, Oct 2020 (for new type boards only. 1.04 or earlier is good for earlier boards).
Please coordinate with Support to send them in. I assume a bunch together would be fine (easier for the programming person for sure).

**Earlier boards with FW 1.04 and earlier should NOT be sent in,,,, they are OK.

**TO CLARIFY; Only send in the newer revision of the board with 2.00 thru 2.04 firmware, OR glitchy Firmware reporting like 00.10 etc that changes with each power cycle or query to read FW.
 
To check;
At turn-on of the K3, long press Menu and you will see the current MCU FW of the radio... Rotate VFO A fully clock-wise and read the "dr  02.xx" number to see the DVR Firmware.
 
*OR* look at the board; With the top cover off you can look down in and see;
Old DVR has the big electrolytic capacitor near the mounting standoff, don't send this in.
New DVR has the big capacitor near the connector, Send these in.

You are responsible for shipping both ways, programming is Warranty.
Keith WE6R Elecraft K3 Tech


Re: Elecraft K3S - DVR problems

OZ0J Joe
 

Hi Keith

 

My K3S was delivered as brand new from Elecraft in winder 2018/2019. Have you forgotten to upgrade the DVK inside before shipping?

 

I know that there are some K3 and K3S in Denmark and in use. Can I collect the DVKs for an update and ship them in one package? And what is the price beside the freight costs?

 

73 Joe, OZ0J

https://english.oz0j.dk

 

 

 

Fra: Elecraft-K3@groups.io <Elecraft-K3@groups.io> På vegne af Keith_WE6R
Sendt: 18. oktober 2020 21:05
Til: Elecraft-K3@groups.io
Emne: Re: [Elecraft-K3] Elecraft K3S - DVR problems

 

Hi Joe, we need to program new FW into that DVR. Any FW rev of 2.xx should be upgraded to the current 2.05!
The 06.04 reading is not valid and a glitch. 
(1.04 or older are a different rev of board and are OK).
You will have to take it out and send in,,,  (just the DVR board).
Keith WE6R Elecraft Tech

 


KPOD for Sale

KE8G
 

Thanks to all who inquired about the KPOD I offered for sale.  It has been sold.

73 de Jim - KE8G

---------- Forwarded message ---------
From: KE8G <ke8g.jim@...>
Date: Mon, Oct 19, 2020 at 2:24 PM
Subject: KPOD for Sale
To: <Elecraft-K3@groups.io>


Hi All,
I have decided to sell my KPOD, as I really don't use it much and most of the time it isn't even connected to the radio.  When I bought my K3S, it came with the deal.  I am the second owner.

It comes with the K-POD AUX cable and in the original box.  There is no owners manual, it's available/downloadable from the Elecraft website.  

Looks and operates as a brand new piece of equipment, non-smoking home.

The firm price is $225, including shipping to the 48 contiguous states.    

Please contact me via my email listed on the QRZ web site, to keep the bandwidth down on the reflector.

73 de Jim - KE8G


Re: Elecraft K3S - DVR problems

Colin Smithers
 

Thanks Keith,

 

I have already been contacted by others regarding my question to you. I think there may be a bunch of those over here. I’m sure Elecraft records must show how many are in the field?

 

Please let me know once you know so I can arrange to mail it.

 

Kind regards

 

73, Colin G4CWH

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Keith_WE6R via groups.io
Sent: 19 October 2020 19:52
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Elecraft K3S - DVR problems

 

Hi Colin, I am checking but I am fairly sure it will have to come to Watsonville CA to get 2.05.
(and just to clarify, older rev boards with 1.04 or older FW do NOT need to be upgraded and in fact the board was changed enough that the FW is NOT interchangeable).
Keith WE6R Elecraft K3 Tech.


Re: Elecraft K3S - DVR problems

Keith_WE6R
 

Hi Colin, I am checking but I am fairly sure it will have to come to Watsonville CA to get 2.05.
(and just to clarify, older rev boards with 1.04 or older FW do NOT need to be upgraded and in fact the board was changed enough that the FW is NOT interchangeable).
Keith WE6R Elecraft K3 Tech.

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