Date   

Re: 50 mhz/ 6 meter SWR

Bill Gillenwater
 

Thanks Jeff,

Yes, the pins have been replaced on this one.

73 Bill

On 5/9/2022 10:54 AM, jeff stai wk6i wrote:

hi Bill - It sounds like you found a different solution, but just in case...

I was having a similar issue with SWR being off on 6 meters. It turned out that the fix for my very old K3 was to replace the pins on the KREF3 board with gold plated pins. If you have a newer K3 you'll already have the gold pins. 73 jeff wk6i


On Sat, May 7, 2022 at 6:32 PM Bill Gillenwater <k3sv@...> wrote:
I am running into a higher SWR when on 6 meters.

On the HF bands the SWR readings are accurate, ie; 10,15,20 tribander
readings all match the analyzer tests, 1-1 etc.

On 6 meters the analyzer shows 1.2 to 1 but when fed to the K-3 I get a
3.5-1 etc.

Am I missing something?

Also, can I use the internal tuner on 6 meters?

Thanks,

73 Bill








--
Jeff Stai ~ WK6I ~ wk6i.jeff@...
RTTY op at W7RN
Twisted Oak Winery ~ http://www.twistedoak.com/


Re: 50 mhz/ 6 meter SWR

jeff stai wk6i
 

hi Bill - It sounds like you found a different solution, but just in case...

I was having a similar issue with SWR being off on 6 meters. It turned out that the fix for my very old K3 was to replace the pins on the KREF3 board with gold plated pins. If you have a newer K3 you'll already have the gold pins. 73 jeff wk6i


On Sat, May 7, 2022 at 6:32 PM Bill Gillenwater <k3sv@...> wrote:
I am running into a higher SWR when on 6 meters.

On the HF bands the SWR readings are accurate, ie; 10,15,20 tribander
readings all match the analyzer tests, 1-1 etc.

On 6 meters the analyzer shows 1.2 to 1 but when fed to the K-3 I get a
3.5-1 etc.

Am I missing something?

Also, can I use the internal tuner on 6 meters?

Thanks,

73 Bill








--
Jeff Stai ~ WK6I ~ wk6i.jeff@...
RTTY op at W7RN
Twisted Oak Winery ~ http://www.twistedoak.com/


Re: K3 + HDSDR + RSP1A Help please

Chris VE3NRT
 

I acquired an RSP-DX a couple of days ago and have it working with my K3. Prior to that I've run a Softrock-IF into HDSDR from my IF port and it worked fine. There is an output level modification for older K3 models but I expect you should see something on the display even without it. The Softrock IF wasn't great with HDSDR because there was no tuning. I'd set the frequency to 0 and could it was useful for tuning, but not for rig control except with Omnirig, which worked well but got into a complex mix of virtual com ports when using other programs that didn't support it, like N1MM and DXLab.

Recently I found waterfallbandmap, and this worked nicely and was good for bidirectional control, although changing the filter settings moves the IF frequency slightly causing some inaccuracies in the frequency control. I doubt that can be fixed easily with either the RSP or the Softrock, although I guess the P3 knows how to do it - I've never used one. The IF frequency was about 8.215 MHz, I believe.

After reading about the RSP-DX, I decided to buy one before the prices went up. It will work with the IF, but also with the RX in/out which is on the same I/O board of the K3. Using the RX antenna in/out solves the IF-shift problem. The RX out is connected to a T adaptor which splits the signal between the RSP and the RX in. Enabling the RX antenna pushing the received signal through this cable so that both the K3 and the RSP can receive the signal. The ExtIO DLL tracks it (almost) perfectly. It will be perfect once I get around to calibrating the RSP or setting up a external frequency reference to both the K3 and the RSP. I'd go so far to recommend this setup instead of IF unless you have a specific reason for preferring the IF route (I'd like to know it, as maybe I'm missing something). I have an extra cable and antenna port on the RSP so I might try the IF route as well and get a good comparison.

There's no IF offset to worry about in this case, no issues with I/Q reversal when going to 6 metres, and back again when using the 2 metre transverter. It was simple and easy.

I haven't tried it with HDSDR yet. I've been using it with both N1MM and DXLab with Waterfallbandmap, but I will give it a try today if I have time, or over the next few days if I don't.  With waterfallbandmap I needed to reduce the frequency range to the minimum (200kHz), increase the number of FFT buckets to the maximum, adjust the contrast and zoom in to get a good looking display with the skinny CW signals. With the default number of FFT buckets the signals showed up as blocks instead of dots & lines. 

I'm looking forward to trying HDSDR. The RSP is a very capable unit. I'm sorry this is skirting around your question, but I'm hoping it might be helpful.

73,
Chris VE3NRT


Re: K3 + HDSDR + RSP1A Help please

David Erickson - AB0R
 

On 5/8/2022 10:31 PM, K0ATV / Derek wrote:
Yes that was done initially. I get the RSP1A window when I click on device (which has the gain control, offset, etc). HDSDR is friends with the RSP1A.
Thanks!
Derek / K0ATV
Get Outlook for Android <https://aka.ms/AAb9ysg>
------------------------------------------------------------------------
*From:* Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of David Erickson - AB0R <radio@...>
*Sent:* Sunday, May 8, 2022 8:32:39 PM
*To:* Elecraft-K3@groups.io <Elecraft-K3@groups.io>
*Subject:* Re: [Elecraft-K3] K3 + HDSDR + RSP1A Help please
On 5/8/2022 5:46 PM, K0ATV / Derek wrote:
It would help me greatly if you (or anyone with a similar setup) could either post or reachout to me directly (dbrown719@...) with your "SDR device (f8)" settings, and any of the "options (f7)" & any GUI slider settings you have in HDSDR. I am past getting radio to talk to hdsdr & RSP1A to hdsdr. Already have the proper EXTIO as requested by HDSDR for my RSP1A (those two are happy). My spectrum display shows nothing useful. With the RSP1A disconnected from my K3 there is absolutely nothing so it seems like a signal interpretation / settings issue. The IF out is giving it "something". I also ensured my KXV3 is "on" in the config menu. It is by no means plug & play on this end. 😂
Any help is appreciated.
Derek / K0ATV
Derek,
After you installed the EXTIO software, you were instructed to copy the
EXTIO_rsp*.dll into the HDSDR directory.
IF you did that, you should get the SDRplay control panel when you click
on SDR-device[F8].
Is that the case?
Ok,

That is good. Now, if you click "options, then RF front end configuration" you will get the option to tell it to use the IF signal from the SDR controlled by Omni-rig.

That should get you there.


--
Dave Erickson
AB0R
73


Re: K3 + HDSDR + RSP1A Help please

K0ATV / Derek
 

Yes that was done initially. I get the RSP1A window when I click on device (which has the gain control, offset, etc). HDSDR is friends with the RSP1A.

Thanks!

Derek / K0ATV

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of David Erickson - AB0R <radio@...>
Sent: Sunday, May 8, 2022 8:32:39 PM
To: Elecraft-K3@groups.io <Elecraft-K3@groups.io>
Subject: Re: [Elecraft-K3] K3 + HDSDR + RSP1A Help please
 
On 5/8/2022 5:46 PM, K0ATV / Derek wrote:
> It would help me greatly if you (or anyone with a similar setup) could
> either post or reachout to me directly (dbrown719@...) with your
> "SDR device (f8)" settings, and any of the "options (f7)" & any GUI
> slider settings you have in HDSDR. I am past getting radio to talk to
> hdsdr & RSP1A to hdsdr. Already have the proper EXTIO as requested by
> HDSDR for my RSP1A (those two are happy). My spectrum display shows
> nothing useful. With the RSP1A disconnected from my K3 there is
> absolutely nothing so it seems like a signal interpretation / settings
> issue. The IF out is giving it "something". I also ensured my KXV3 is
> "on" in the config menu. It is by no means plug & play on this end. 😂
>
> Any help is appreciated.
>
> Derek / K0ATV

Derek,

After you installed the EXTIO software, you were instructed to copy the
EXTIO_rsp*.dll into the HDSDR directory.

IF you did that, you should get the SDRplay control panel when you click
on SDR-device[F8].

Is that the case?


--
Dave Erickson
AB0R
73






Re: 50 mhz/ 6 meter SWR

K5KG
 

Bill, I’m having difficulty understanding your email. If you are having a VSWR problem, please start by explaining the antenna you are using, and what you have done to isolate the cause of the mismatch.

Give me a call if you’d like to discuss it. 941-400-1960.

OJ, George K5KG

On May 7, 2022, at 21:32, Bill Gillenwater <k3sv@...> wrote:

I am running into a higher SWR when on 6 meters.

On the HF bands the SWR readings are accurate, ie; 10,15,20 tribander readings all match the analyzer tests, 1-1 etc.

On 6 meters the analyzer shows 1.2 to 1 but when fed to the K-3 I get a 3.5-1 etc.

Am I missing something?

Also, can I use the internal tuner on 6 meters?

Thanks,

73 Bill






Re: K3 + HDSDR + RSP1A Help please

David Erickson - AB0R
 

On 5/8/2022 5:46 PM, K0ATV / Derek wrote:
It would help me greatly if you (or anyone with a similar setup) could either post or reachout to me directly (dbrown719@...) with your "SDR device (f8)" settings, and any of the "options (f7)" & any GUI slider settings you have in HDSDR. I am past getting radio to talk to hdsdr & RSP1A to hdsdr. Already have the proper EXTIO as requested by HDSDR for my RSP1A (those two are happy). My spectrum display shows nothing useful. With the RSP1A disconnected from my K3 there is absolutely nothing so it seems like a signal interpretation / settings issue. The IF out is giving it "something". I also ensured my KXV3 is "on" in the config menu. It is by no means plug & play on this end. 😂
Any help is appreciated.
Derek / K0ATV
Derek,

After you installed the EXTIO software, you were instructed to copy the EXTIO_rsp*.dll into the HDSDR directory.

IF you did that, you should get the SDRplay control panel when you click on SDR-device[F8].

Is that the case?


--
Dave Erickson
AB0R
73


Re: 50 mhz/ 6 meter SWR

Jim Brown
 

On 5/8/2022 9:15 AM, Dan Roberts wrote:
I then went through my collection of old cables and found most to be good, but two off-brand cables were not.
There IS junk cable out there, just as there are junk connectors. It just plain foolish to buy anything but quality in both.

73, Jim K9YC


Re: K3 + HDSDR + RSP1A Help please

K0ATV / Derek
 

It would help me greatly if you (or anyone with a similar setup) could either post or reach out to me directly (dbrown719@...) with your "SDR device (f8)" settings, and any of the "options (f7)" & any GUI slider settings you have in HDSDR. I am past getting radio to talk to hdsdr & RSP1A to hdsdr. Already have the proper EXTIO as requested by HDSDR for my RSP1A (those two are happy). My spectrum display shows nothing useful. With the RSP1A disconnected from my K3 there is absolutely nothing so it seems like a signal interpretation / settings issue. The IF out is giving it "something". I also ensured my KXV3 is "on" in the config menu. It is by no means plug & play on this end. 😂

Any help is appreciated. 

Derek / K0ATV



From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of David Erickson - AB0R <radio@...>
Sent: Sunday, May 8, 2022 3:57:21 PM
To: Elecraft-K3@groups.io <Elecraft-K3@groups.io>
Subject: Re: [Elecraft-K3] K3 + HDSDR + RSP1A Help please
 
On 5/8/2022 4:39 PM, K0ATV / Derek wrote:
> Folks, I just picked up a used K3 and am very very excited about this
> radio. One of my wants is to utilize the IF out to my RSP1A and into an
> SDR program. I am not really particular to any SDR program if someone
> has info doing this with another. There is little and conflicting
> information about this scenario via google search. It does seem that
> others have done it, but the instructions given have some holes in them.
> I can get HDSDR control via Omni Rig working, but cannot for the life of
> me get viable spectrum data on the waterfall. I am apparently doing
> something wrong somewhere. If you have experience with this scenario
> please chime in, I could really use some help!
>
> Derek / K0ATV

Derek,

You are very close to having it sorted out.

It works FB as you say, HDSDR, OmniRig, and RSP(duo in my case)

The RSPduo can read the IF output directly and there was no need to
configure anything beyond what you have already said.

DO make sure you have installed the RSP "EXTIO_rsp***" package available
from their website. That is required for HDSDR to talk to the RSP(duo).

Good luck, you will like it.

--
Dave Erickson
AB0R
73






Re: K3 + HDSDR + RSP1A Help please

Wes Stewart
 

Personally I used an SDR-IQ and SpectraVue software on my K3(S)s.  But you don't have an SDR-IQ so you might look here: https://www.sdr-radio.com/external-radio

I have not tried this and find SDR-Console (and every other SDR software, except for SpectraVue) to be unnecessarily complicated.  I've only tried it to run my Perseus and can't get my head around it.  Too much like a video game.  YMMV.


Re: K3 + HDSDR + RSP1A Help please

David Erickson - AB0R
 

On 5/8/2022 4:39 PM, K0ATV / Derek wrote:
Folks, I just picked up a used K3 and am very very excited about this radio. One of my wants is to utilize the IF out to my RSP1A and into an SDR program. I am not really particular to any SDR program if someone has info doing this with another. There is little and conflicting information about this scenario via google search. It does seem that others have done it, but the instructions given have some holes in them. I can get HDSDR control via Omni Rig working, but cannot for the life of me get viable spectrum data on the waterfall. I am apparently doing something wrong somewhere. If you have experience with this scenario please chime in, I could really use some help!
Derek / K0ATV
Derek,

You are very close to having it sorted out.

It works FB as you say, HDSDR, OmniRig, and RSP(duo in my case)

The RSPduo can read the IF output directly and there was no need to configure anything beyond what you have already said.

DO make sure you have installed the RSP "EXTIO_rsp***" package available from their website. That is required for HDSDR to talk to the RSP(duo).

Good luck, you will like it.

--
Dave Erickson
AB0R
73


K3 + HDSDR + RSP1A Help please

K0ATV / Derek
 

Folks, I just picked up a used K3 and am very very excited about this radio. One of my wants is to utilize the IF out to my RSP1A and into an SDR program. I am not really particular to any SDR program if someone has info doing this with another. There is little and conflicting information about this scenario via google search. It does seem that others have done it, but the instructions given have some holes in them. I can get HDSDR control via Omni Rig working, but cannot for the life of me get viable spectrum data on the waterfall. I am apparently doing something wrong somewhere. If you have experience with this scenario please chime in, I could really use some help!

Derek / K0ATV


K3 Group

Danny Bryant
 

thank for letting me join, I have had a K3 for several months now an am still trying to learn all of the functions. I did have a KX3 for a year and am fairly familiar 
W5CI

Danny Bryant
W5CI
LICWC #1615 Life Member





Re: 50 MHz/ 6 meter SWR

Ray Maxfield
 

Especially at 6 meters !

 

Ray WA6VAB  K3

 

 

From: Charlie T, k3ICH
Sent: Sunday, May 8, 2022 1:28 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] 50 MHz/ 6 meter SWR

 

Correction….”a small length of the WRONG impedance can screw up……

The ¼λ was to illustrate the worst case.

Reality is somewhere in between…

 

Diddle dee dah didah., C

 

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Wes Stewart via groups.io
Sent: Sunday, May 08, 2022 3:15 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] 50 MHz/ 6 meter SWR

 

Wait a minute Charlie.

First you say a small amount/length difference can screw up a measurement and then offer a 1.5 to 2 difference in Z and the worst possible length to bolster your claim. I say change the length to 1/2 wavelength and get back to us :-)

Wes  N7WS


On Sun, May 8, 2022 at 11:12 AM, Charlie T, k3ICH wrote:

Yes, you are absolutely correct.

 

The wrong Z even if off my a small amount, and/or length of coax can REALLY screw up SWR measurements.

 

Want proof?  Add a ¼ λ piece of RG-59 or RG-62  in series with your good-working antenna and observe the results.

 

73, Charlie k3ICH

 

 


Re: 50 MHz/ 6 meter SWR

Charlie T, k3ICH
 

Correction….”a small length of the WRONG impedance can screw up……

The ¼λ was to illustrate the worst case.

Reality is somewhere in between…

 

Diddle dee dah didah., C

 

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Wes Stewart via groups.io
Sent: Sunday, May 08, 2022 3:15 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] 50 MHz/ 6 meter SWR

 

Wait a minute Charlie.

First you say a small amount/length difference can screw up a measurement and then offer a 1.5 to 2 difference in Z and the worst possible length to bolster your claim. I say change the length to 1/2 wavelength and get back to us :-)

Wes  N7WS


On Sun, May 8, 2022 at 11:12 AM, Charlie T, k3ICH wrote:

Yes, you are absolutely correct.

 

The wrong Z even if off my a small amount, and/or length of coax can REALLY screw up SWR measurements.

 

Want proof?  Add a ¼ λ piece of RG-59 or RG-62  in series with your good-working antenna and observe the results.

 

73, Charlie k3ICH

 


Re: W2 wattmeter windows interface?

Mark N2QT
 

Thanks will let you know what I find….  


Re: 50 mhz/ 6 meter SWR

Ray Maxfield
 

As I remember, the ATU dose work on 6 Meters.

 

Ray WA6VAB  K3 

 

From: Bill Gillenwater
Sent: Sunday, May 8, 2022 11:17 AM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] 50 mhz/ 6 meter SWR

 

Thanks Joe.

 

That worked.

 

73 Bill K3SV

 

On 5/8/2022 9:27 AM, Joe Subich, W4TV wrote:

> > Also, can I use the internal tuner on 6 meters?

> Do you have the KAT3 or KAT3A?  If the former, the tuner is

> in circuit all the time - simply set to the memorized value

> for a 50 Ohm load.  Connect your dummy load directly to the

> rig, enable the tuner and tune into the dummy load to reset

> the "bypass" values.  See if that doesn't get the K3 display

> closer to the analyzer.

> ... and, yes you can use the internal tuner on 6M.  I do it

> regularly.

> 73,

>    ... Joe, W4TV

> On 2022-05-07 2:22 PM, Bill Gillenwater wrote:

>> I am running into a higher SWR when on 6 meters.

>> 

>> On the HF bands the SWR readings are accurate, ie; 10,15,20 tribander

>> readings all match the analyzer tests, 1-1 etc.

>> 

>> On 6 meters the analyzer shows 1.2 to 1 but when fed to the K-3 I get

>> a 3.5-1 etc.

>> 

>> Am I missing something?

>> 

>> Also, can I use the internal tuner on 6 meters?

>> 

>> Thanks,

>> 

>> 73 Bill

>> 

>

 

 

 

 

 


Re: 50 MHz/ 6 meter SWR

Wes Stewart
 

Wait a minute Charlie.

First you say a small amount/length difference can screw up a measurement and then offer a 1.5 to 2 difference in Z and the worst possible length to bolster your claim. I say change the length to 1/2 wavelength and get back to us :-)

Wes  N7WS


On Sun, May 8, 2022 at 11:12 AM, Charlie T, k3ICH wrote:

Yes, you are absolutely correct.

 

The wrong Z even if off my a small amount, and/or length of coax can REALLY screw up SWR measurements.

 

Want proof?  Add a ¼ λ piece of RG-59 or RG-62  in series with your good-working antenna and observe the results.

 

73, Charlie k3ICH

 


Re: 50 mhz/ 6 meter SWR

Bill Gillenwater
 

Thanks Joe.

That worked.

73 Bill K3SV

On 5/8/2022 9:27 AM, Joe Subich, W4TV wrote:

Also, can I use the internal tuner on 6 meters?
Do you have the KAT3 or KAT3A?  If the former, the tuner is
in circuit all the time - simply set to the memorized value
for a 50 Ohm load.  Connect your dummy load directly to the
rig, enable the tuner and tune into the dummy load to reset
the "bypass" values.  See if that doesn't get the K3 display
closer to the analyzer.

... and, yes you can use the internal tuner on 6M.  I do it
regularly.

73,

   ... Joe, W4TV


On 2022-05-07 2:22 PM, Bill Gillenwater wrote:
I am running into a higher SWR when on 6 meters.

On the HF bands the SWR readings are accurate, ie; 10,15,20 tribander readings all match the analyzer tests, 1-1 etc.

On 6 meters the analyzer shows 1.2 to 1 but when fed to the K-3 I get a 3.5-1 etc.

Am I missing something?

Also, can I use the internal tuner on 6 meters?

Thanks,

73 Bill





Re: 50 mhz/ 6 meter SWR

Bill Gillenwater
 

Thanks. Yes, I checked into a dummy load just now. The 6 meter coax fun is all new 400 stuff. I few jumpers in the shack that I just checked out. I ended up going through a re-calibrating process that was recommended for each band, using the ATU and also the bypass. The bands that were off are now calibrated to the 50 ohm dummy load. All looking good now.

Thanks Dan

73 Bill K3SV

On 5/8/2022 12:15 PM, Dan Roberts wrote:

Is your coax really 50 Ohms?  I’m not joking.  Just because it says RG8/U on the jacket, doesn’t mean it is.  I found this out the hard way, a few months ago, when trying to tweak the tuning on a new 6 meter beam.  After several days of ladder climbing and strange results, I put a precision load at the end of the off-brand coax and measured a VSWR of about 1.6 on all frequencies!  Clearly not a 50 Ohm cable.  Replaced with cable from well known  U.S. manufacturer and saw zero reflected.  Antenna tuned right up. 

 

I then went through my collection of old cables and found most to be good, but two off-brand cables were not. 

 

Until that experience, I’d always assumed that RG-8/U meant 50 Ohms and never questioned it.  Now, before I start any antenna project, I check the cable with a precision load and my antenna analyzer.  Absolutely worth the few minutes it takes.

 

Dan-K9DR

 

Sent from Mail for Windows

 

From: Joe Subich, W4TV
Sent: Sunday, May 8, 2022 7:27 AM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] 50 mhz/ 6 meter SWR

 

 

> Also, can I use the internal tuner on 6 meters?

 

Do you have the KAT3 or KAT3A?  If the former, the tuner is

in circuit all the time - simply set to the memorized value

for a 50 Ohm load.  Connect your dummy load directly to the

rig, enable the tuner and tune into the dummy load to reset

the "bypass" values.  See if that doesn't get the K3 display

closer to the analyzer.

 

... and, yes you can use the internal tuner on 6M.  I do it

regularly.

 

73,

 

    ... Joe, W4TV

 

 

On 2022-05-07 2:22 PM, Bill Gillenwater wrote:

> I am running into a higher SWR when on 6 meters.

>

> On the HF bands the SWR readings are accurate, ie; 10,15,20 tribander

> readings all match the analyzer tests, 1-1 etc.

>

> On 6 meters the analyzer shows 1.2 to 1 but when fed to the K-3 I get a

> 3.5-1 etc.

>

> Am I missing something?

>

> Also, can I use the internal tuner on 6 meters?

>

> Thanks,

>

> 73 Bill

>

 

 

 

 

 

 

 

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