kx3 is there txco ocxo ????

[paim]

hello 
is any one know id the kx3 have tcxo or ocxo i cant see anything on the leaflet 

 
vy 73
E.P  g0uut
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[Don Wilhelm-4]

E.P.

Look at the specifications in the manual.

The specifications state that the stability is +/-1ppm over 0-50 degC.  
Whether or not that meets your criteria for a TCXO or an OCXO is to be
determined by your expectations of stability.  For me, the TCXO or OCXO
terms alone are meaningless, they must relate to the specifications for
each.  For example, a TXCO having +/- 9 ppm stability has worse
stability than a non-TCXO with a stability of +/-5ppm.

73,
Don W3FPR

On 11/5/2012 9:31 AM, paim wrote:
> hello
> is any one know id the kx3 have tcxo or ocxo i cant see anything on the leaflet
>
>

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[Matt Zilmer]

TCXO.

On Mon, 05 Nov 2012 14:31:59 +0000 (GMT), you wrote:

>hello 
>is any one know id the kx3 have tcxo or ocxo i cant see anything on the leaflet 
>
> 
>vy 73
>E.P  g0uut
>______________________________________________________________
>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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[paim]

hello Don 
i cant see it sorry i will look again. however you did answer this but what is the device using is it tcxo or what 
i like to know it look great radio 2nd palce on Rob sherwood list as well nice .

 
vy 73
E.P  g0uut
 
 
 


________________________________
 From: Don Wilhelm <[hidden email]>
To: paim <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Monday, 5 November 2012, 14:48
Subject: Re: [Elecraft] kx3 is there txco ocxo ????
 
E.P.

Look at the specifications in the manual.

The specifications state that the stability is +/-1ppm over 0-50 degC.  Whether or not that meets your criteria for a TCXO or an OCXO is to be determined by your expectations of stability.  For me, the TCXO or OCXO terms alone are meaningless, they must relate to the specifications for each.  For example, a TXCO having +/- 9 ppm stability has worse stability than a non-TCXO with a stability of +/-5ppm.

73,
Don W3FPR

On 11/5/2012 9:31 AM, paim wrote:
> hello
> is any one know id the kx3 have tcxo or ocxo i cant see anything on the leaflet
>
>
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[Edward R Cole]

The freq stability is rated at 1ppm which is +/- 28-Hz on 10m or +/-
50-Hz on 6m.  Since 6m is to be the IF for the 2m module that is not
adequate for some digital modes (like JT65 used in eme).  Often I
select the 20-Hz bw on JT65 so if the radio drifts out of that signal
decoding will be interupted.

Wayne has talked about a possible EXREF for the KX3 which I suppose
would offer better stability locked to an external reference (like
what was done for the K3?).

I get +/- 6Hz on 432 with my K3+EXREF and a 432-28 PLL locked transverter.

73, Ed - KL7UW

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[paim]

Ed 
thank you great info 
thank you for you time and help 

 
vy 73
E.P  g0uut
 
 
 


________________________________
 From: Edward R Cole <[hidden email]>
To: [hidden email]
Sent: Monday, 5 November 2012, 18:12
Subject: Re: [Elecraft] kx3 is there txco ocxo ????
 
The freq stability is rated at 1ppm which is +/- 28-Hz on 10m or +/-
50-Hz on 6m.  Since 6m is to be the IF for the 2m module that is not
adequate for some digital modes (like JT65 used in eme).  Often I
select the 20-Hz bw on JT65 so if the radio drifts out of that signal
decoding will be interupted.

Wayne has talked about a possible EXREF for the KX3 which I suppose
would offer better stability locked to an external reference (like
what was done for the K3?).

I get +/- 6Hz on 432 with my K3+EXREF and a 432-28 PLL locked transverter.

73, Ed - KL7UW

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[WB4SON]

There have been some reports of transmit drift in early KX3 units,
especially modes that are long duration, like JT65.  A modification has
been made in the firmware that allows for making a custom temperature
correction curve that is used to compensate the oscillator as the PA heats
up.  It changed the situation for me on JT65-HF from one where my transmit
signal would vary unacceptably over a 48 second period, to one that is
entirely acceptable.  The calibration process does require access to a
stable signal source (like a K3 that is warmed up and in a steady-temp
room).

73, Bob, WB4SON
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[paim]

okay Bob thank you for this info 
however it is very importent to have ocxo or txco or vcxo any of them when working digi or ssb mode .
 
vy 73
E.P  g0uut
 
 
 


________________________________
 From: Bob <[hidden email]>
To: [hidden email]
Sent: Monday, 5 November 2012, 18:50
Subject: Re: [Elecraft] kx3 is there txco ocxo ????
 
There have been some reports of transmit drift in early KX3 units,
especially modes that are long duration, like JT65.  A modification has
been made in the firmware that allows for making a custom temperature
correction curve that is used to compensate the oscillator as the PA heats
up.  It changed the situation for me on JT65-HF from one where my transmit
signal would vary unacceptably over a 48 second period, to one that is
entirely acceptable.  The calibration process does require access to a
stable signal source (like a K3 that is warmed up and in a steady-temp
room).

73, Bob, WB4SON
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