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KX3 and digital modes

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wayne burdick

KX3 and digital modes

Administrator

Hi all,

Lance (W7GJ) recently described his efforts to use the KX3 for JT65
for 6-meter moonbounce. Lance pretty much wrote the book on this
niche, so it's not surprising that he went to extremes, rolling his
own heatsink to reduce the RX-TX frequency shift to just a few Hz on 6
meters. He also used our new temperature-compensation procedure.

I admire Lance's dedication to this pursuit--and put a lot of time in
on it myself. But I wanted to point out that supplemental heatsinking
of the KX3 is *not* needed for typical digital-mode operation with the
KX3. PSK31, RTTY, etc. will all function "out of the box" on the lower
bands (20 meters is by far the most common band for digital
communications).

If you want to use JT65 or other extremely narrowband modes, I do
suggest doing extended VFO temperature compensation. There's a
procedure for this on our KX3 page, and if you don't have a very
stable signal source, you can use our new XG50 RF generator.

73,
Wayne
N6KR

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David Christ

Re: KX3 and digital modes

What am I missing? This is not the first time an XG50 has been mentioned. However I can find no sign of it on the Elecraft web site.

David K0LUM

On Nov 19, 2012, at 8:13 PM, Wayne Burdick wrote:

> and if you don't have a very
> stable signal source, you can use our new XG50 RF generator.
>
> 73,
> Wayne
> N6KR

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Bruce Beford-2

Re: KX3 and digital modes

In reply to this post by wayne burdick

>From the order page, under KX3 accessories:

XG50 Kit (Simple 49.380 MHz Signal Source)
The Elecraft XG50 is a simple 49.380 MHz signal source specifically designed
for use with the KX3 Extended VFO Temperature Compensation Procedure. See
App Note.

I used the 5th harmonic of my 10 MHz GPSDO for the procedure.
73,
Bruce, N1RX

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KC6CNN

Re: KX3 and digital modes

In reply to this post by David Christ

CONTENTS DELETED

The author has deleted this message.

Dave-3

Re: KX3 and digital modes

In reply to this post by wayne burdick

Following the listed procedure made made my KX3's previously iffy
performance on 6m digimodes acceptable and even just about acceptable for HF
QRSS.

I used the 5th harmonic of my K3's 10MHz GPS locked reference as the
calibration signal

Dave

Ww2r

Message: 14
Date: Mon, 19 Nov 2012 18:13:03 -0800
From: Wayne Burdick <[hidden email]>
Subject: [Elecraft] KX3 and digital modes
To: [hidden email], Elecraft Reflector <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

Hi all,

Lance (W7GJ) recently described his efforts to use the KX3 for JT65
for 6-meter moonbounce. Lance pretty much wrote the book on this
niche, so it's not surprising that he went to extremes, rolling his
own heatsink to reduce the RX-TX frequency shift to just a few Hz on 6
meters. He also used our new temperature-compensation procedure.

I admire Lance's dedication to this pursuit--and put a lot of time in
on it myself. But I wanted to point out that supplemental heatsinking
of the KX3 is *not* needed for typical digital-mode operation with the
KX3. PSK31, RTTY, etc. will all function "out of the box" on the lower
bands (20 meters is by far the most common band for digital
communications).

If you want to use JT65 or other extremely narrowband modes, I do
suggest doing extended VFO temperature compensation. There's a
procedure for this on our KX3 page, and if you don't have a very
stable signal source, you can use our new XG50 RF generator.

73,
Wayne
N6KR

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John Hendricks-2

Re: KX3 and digital modes

In reply to this post by David Christ

The XG50 is a 49 MHZ signal generator of the stable verity used to calibrate the temperature compensation of the KX3. I used my K3 as a signal source & it worked fine.

John Hendricks K7JLT
Sent from my iPod

On Nov 20, 2012, at 6:28, David Christ <[hidden email]> wrote:

> What am I missing? This is not the first time an XG50 has been mentioned. However I can find no sign of it on the Elecraft web site.
>
> David K0LUM
>
>
> On Nov 19, 2012, at 8:13 PM, Wayne Burdick wrote:
>
>> and if you don't have a very
>> stable signal source, you can use our new XG50 RF generator.
>>
>> 73,
>> Wayne
>> N6KR
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html

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vk2rq

Re: KX3 and digital modes

In reply to this post by David Christ

It's there under the mini module kits:
http://www.elecraft.com/elecraft_prod_list.htm#ezk

73, Matt VK2RQ
On Nov 21, 2012 8:38 AM, "David Christ" <[hidden email]> wrote:

> What am I missing? This is not the first time an XG50 has been mentioned.
> However I can find no sign of it on the Elecraft web site.
>
> David K0LUM
>
>
> On Nov 19, 2012, at 8:13 PM, Wayne Burdick wrote:
>
> > and if you don't have a very
> > stable signal source, you can use our new XG50 RF generator.
> >
> > 73,
> > Wayne
> > N6KR
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

David Christ

Re: KX3 and digital modes

In reply to this post by KC6CNN

Found it. Thanks all.

What really had me puzzled is that when I entered xg50 (or XG50) in the search box at the top of the price list and order page I got "Sorry, no matches were found containing xg50". No clue as to why.

David K0LUM

On Nov 20, 2012, at 5:42 PM, Gerald Manthey wrote:

> Its on the kx3 order page.
>
> On Nov 20, 2012 5:15 PM, "David Christ" <[hidden email]> wrote:
> What am I missing? This is not the first time an XG50 has been mentioned. However I can find no sign of it on the Elecraft web site.
>
> David K0LUM
>
>
> On Nov 19, 2012, at 8:13 PM, Wayne Burdick wrote:
>
> > and if you don't have a very
> > stable signal source, you can use our new XG50 RF generator.
> >
> > 73,
> > Wayne
> > N6KR
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html