KREF3 External Reference card

[Edward R Cole]

One of the reasons I chose the K3 was eventual 10-MHz ext. reference
capability.

Well, then I guess someone will have to come up with a 49.380 PLL
circuit that uses 10-MHz as a reference.  I have two such critters
for mw use.  One is distributed out of Israel and will be used in
place of my 1152-MHz LO for 1296-MHz transverter (144-MHz IF).  The
other (ApolLO-A32) will replace the LO for my 3400-MHz transverter
(also 144-MHz IF).  Should be easier to do at lower frequencies.

The new line of VHF/UHF transverters from DEMI will have ext. ref.
option available in the future.  It is already available on their mw
line (2.3-GHz and up).

73, Ed - KL7UW

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

Message: 2
Date: Wed, 09 Jun 2010 12:49:16 -0400
From: [hidden email]
Subject: Re: [Elecraft] KREF3  External Reference card
To: [hidden email]
Message-ID:
        <S364279Ab0FIQtQ/[hidden email]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1"

This question is one I have been asking annually at the Elecraft booth at
Hamcom in Dallas for the last 2 years. I will be asking again on Friday. The
last information given was in jun 2008 when I was told "availability in Jan
2009", heard no dates since! Based on this I didnt order the high spec
reference for either of my K3.

Dave

ww2r

Message: 40
Date: Wed, 9 Jun 2010 16:51:53 +0100
From: David Pratt <[hidden email]>
Subject: Re: [Elecraft] KREF3  External Reference card
To: Elecraft Reflector <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain;charset=us-ascii;format=flowed

I am afraid that I think you will find that it's on the back burner,
Trevor, but I hope Wayne will reply and then we shall all know once and
for all.  I have been pushing for this for a long time as it would be
nice to be able to feed my 10MHz Rubidium standard into J3 to get near
precise calibration.

I suspect that the problem is due to the internal reference oscillator
of all our K3s being different. Although the KREF3 schematic shows the
oscillator to be on 49.380 MHz, we all adjust this during the K3
calibration procedure. (Mine is on 49.379744)

I could be wrong, but I shall await Wayne's response.

73 de David G4DMP

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[P.B. Christensen]

> One of the reasons I chose the K3 was eventual 10-MHz ext. reference
> capability.

Hopefully, it's still on the table for development and not permanently
shelved.  I can certainly understand the need to prioritize other K3
features and accessories before producing the external 10 MHz Reference
module.

Paul, W9AC

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[Julian, G4ILO]

P.B. Christensen wrote

Hopefully, it's still on the table for development

Eric's statement seemed to me to be as near to a definitive "no it isn't" as you are likely to get.

It's a pity. It was a pretty unique selling point for the K3. The only other transceivers offering this facility that I can find are the much larger and more expensive IC-7700 and IC-7800 and the much less functional ADAT (if it really exists.)

Julian, G4ILO

[juergen piezo]

Hi Julian

The ADAT web page has not been updated in 2 years. Their marketing is almost non existent. One would assume it  is just an experimental platform  like HPSDR. Who is really going to sink 6000 dollars into an experimental project?

After the German magazine review identified spurious products in the receiver, not much has been heard from  ADAT since. I expect that the  ADAT transceiver will  fall apart just like the Hilberling project did.

Its a pity that  this fine transceiver will not  make it to the marketplace. I certainly wanted to  buy one.


John

P.B. Christensen wrote:
>
> Hopefully, it's still on the table for development
>
Eric's statement seemed to me to be as near to a definitive "no it isn't" as
you are likely to get.

It's a pity. It was a pretty unique selling point for the K3. The only other
transceivers offering this facility that I can find are the much larger and
more expensive IC-7700 and IC-7800 and the much less functional ADAT (if it
really exists.)

Julian, G4ILO


--- On Fri, 6/11/10, Paul Christensen <[hidden email]> wrote:

> From: Paul Christensen <[hidden email]>
> Subject: Re: [Elecraft] KREF3  External Reference card
> To: [hidden email]
> Date: Friday, June 11, 2010, 4:16 AM
> > One of the reasons I chose the
> K3 was eventual 10-MHz ext. reference
> > capability.
>
> Hopefully, it's still on the table for development and not
> permanently
> shelved.  I can certainly understand the need to
> prioritize other K3
> features and accessories before producing the external 10
> MHz Reference
> module.
>
> Paul, W9AC
>
> ______________________________________________________________
> 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
>

     
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