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Re: KREF3 External Reference Option

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Edward R Cole

Re: KREF3 External Reference Option

One of my prime considerations choosing the K3 was for the Ext.
Ref. For the interim, I decided on the high accuracy 1/2-ppm
TCXO-3. I am pretty happy with it as is, but will get the external
option when it becomes available since I have a master freq.
reference OCXO for the station and a Rubidium standard for my
frequency counter (good to 26-GHz). I am QRV 600m to 3cm. and will
add 24-GHz in the near future.

I am required to have <1 Hz error on 495.053 KHz under my WD2XSH/45
license. I have a DDS synthesizer with that accuracy/stability and
the K3 is dead on with it.

So Nige, do not be put off by this issue if it is what is deciding
you against the K3.

------------------------------

Message: 12
Date: Wed, 8 Sep 2010 07:29:27 +0100
From: David Pratt <[hidden email]>
Subject: Re: [Elecraft] KREF3 External Reference Option: Detailed
proposal
To: Nige <[hidden email]>
Cc: [hidden email]
Message-ID: <[hidden email]>
Content-Type: text/plain;charset=us-ascii;format=flowed

This is coming, Nige; see Wayne's msg on the reflector on 15 June at
00:15:39 ....
===SNIP
In a recent message, Nige <[hidden email]> wrote ...
>
>Wow that was a close one. I was planning to buy a loaded K3 + P3 as a
>back-up radio for my Flex 5K which does have an external reference
>input. The cart was loaded to go but now I know the K3 doesn't have
>this capability this is very disappointing and I'll have to reconsider
>what to do with my money.
>
>This really is a shame.
>
>Nige.
>G7CNF
--
David G4DMP
Leeds, England, UK
------

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-QRT*, 432-100w, 1296-QRT*, 3400-fall 2010
DUBUS Magazine USA Rep [hidden email]
======================================
*temp
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Nige

Re: KREF3 External Reference Option

I appreciate everyone's enthusiasm to convince me and was warmed by an off-list message from Wayne but as I explained to Wayne, my Flex is accurate to less than 0.03 Hz @ 50 MHz and the suggested specification for the KREF3 is about 1Hz @ 20 MHz. That is an order of magnitude away from what I consider acceptable when driven by a Reference to 10e-14/H.

I'll keep watching the evolution of this in case the boys at Ele can work their magic.

All the best,

Nige.

------------------------------

Message: 11
Date: Wed, 08 Sep 2010 10:24:42 -0800
From: "Edward R. Cole" <[hidden email]>
Subject: Re: [Elecraft] KREF3 External Reference Option
To: [hidden email]
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="us-ascii"; format=flowed

One of my prime considerations choosing the K3 was for the Ext.
Ref. For the interim, I decided on the high accuracy 1/2-ppm
TCXO-3. I am pretty happy with it as is, but will get the external
option when it becomes available since I have a master freq.
reference OCXO for the station and a Rubidium standard for my
frequency counter (good to 26-GHz). I am QRV 600m to 3cm. and will
add 24-GHz in the near future.

I am required to have <1 Hz error on 495.053 KHz under my WD2XSH/45
license. I have a DDS synthesizer with that accuracy/stability and
the K3 is dead on with it.

So Nige, do not be put off by this issue if it is what is deciding
you against the K3.

------------------------------

Message: 12
Date: Wed, 8 Sep 2010 07:29:27 +0100
From: David Pratt <[hidden email]>
Subject: Re: [Elecraft] KREF3 External Reference Option: Detailed
proposal
To: Nige <[hidden email]>
Cc: [hidden email]
Message-ID: <[hidden email]>
Content-Type: text/plain;charset=us-ascii;format=flowed

This is coming, Nige; see Wayne's msg on the reflector on 15 June at
00:15:39 ....
===SNIP
In a recent message, Nige <[hidden email]> wrote ...
>
>Wow that was a close one. I was planning to buy a loaded K3 + P3 as a
>back-up radio for my Flex 5K which does have an external reference
>input. The cart was loaded to go but now I know the K3 doesn't have
>this capability this is very disappointing and I'll have to reconsider
>what to do with my money.
>
>This really is a shame.
>
>Nige.
>G7CNF
--
David G4DMP
Leeds, England, UK
------

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-QRT*, 432-100w, 1296-QRT*, 3400-fall 2010
DUBUS Magazine USA Rep [hidden email]
======================================
*temp

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Jerry T. Dowell

Re: KREF3 External Reference Option

I agree with you, Nige.

Jerry AI6L

-----Original Message-----
From: Nige [mailto:[hidden email]]
Sent: Thursday, September 09, 2010 2:40 AM
To: [hidden email]
Subject: Re: [Elecraft] KREF3 External Reference Option

I appreciate everyone's enthusiasm to convince me and was warmed by an
off-list message from Wayne but as I explained to Wayne, my Flex is accurate
to less than 0.03 Hz @ 50 MHz and the suggested specification for the KREF3
is about 1Hz @ 20 MHz. That is an order of magnitude away from what I
consider acceptable when driven by a Reference to 10e-14/H.

I'll keep watching the evolution of this in case the boys at Ele can work
their magic.

All the best,

Nige.

------------------------------

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Samuel Strongin

Re: KREF3 External Reference Option

I agree Jerry I'll keep watching and waiting before I'll buy. Sam kf4yox

--------------------------------------------------
From: "Jerry T. Dowell" <[hidden email]>
Sent: Friday, September 10, 2010 12:55 PM
To: "'Nige'" <[hidden email]>; <[hidden email]>
Subject: Re: [Elecraft] KREF3 External Reference Option

> I agree with you, Nige.
>
> Jerry AI6L
>
>
> -----Original Message-----
> From: Nige [mailto:[hidden email]]
> Sent: Thursday, September 09, 2010 2:40 AM
> To: [hidden email]
> Subject: Re: [Elecraft] KREF3 External Reference Option
>
> I appreciate everyone's enthusiasm to convince me and was warmed by an
> off-list message from Wayne but as I explained to Wayne, my Flex is
> accurate
> to less than 0.03 Hz @ 50 MHz and the suggested specification for the
> KREF3
> is about 1Hz @ 20 MHz. That is an order of magnitude away from what I
> consider acceptable when driven by a Reference to 10e-14/H.
>
> I'll keep watching the evolution of this in case the boys at Ele can work
> their magic.
>
> All the best,
>
> Nige.
>
>
>
>
> ------------------------------
>
>
> ______________________________________________________________
> 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
>

______________________________________________________________
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