K3 Transverter / 2m unit

[Adriano Perazio]

Hello elecrafters
 
Thinking about the 2m external transverter or the internal unit. Wich
one is better ? Worth ? Or maybe just another rig like 857 ?
 
Tnx
 
PY2ADR
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[N5GE]

On Thu, 4 Nov 2010 06:54:06 -0200, "Adriano Perazio"
<[hidden email]>  wrote:


I have both and prefer the internal version.

Tom
Radio Amateur N5GE

>Hello elecrafters
>
>Thinking about the 2m external transverter or the internal unit. Wich
>one is better ? Worth ? Or maybe just another rig like 857 ?
>
>Tnx
>
>PY2ADR

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[Jeff Cochrane - VK4XA]

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[Alexandr Kobranov]

As I am now to decide to buy K144XV or stay with some external -  let
me ask here:

What is thermal stability of internal 116/118MHz Xtal osc?
I mean some experience with JT data mode in EME or similar. Is there
some drift on 144MHz signal (during longer TX period) and how much if any?

Thanks for any practical experience,

73!
Lexa, OK1DST
K3/100 #727


Dne 4.11.2010 10:38, Jeff Cochrane - VK4BOF napsal(a):

> Hi Adriano,
> I use the K144XV Internal unit and I reckon its a better buy than the external unit for a couple of reasons.
> 1: Convienience - No external cables to lose!
> 2: Coverage of the full 2m band versus only 2MHz coverage of the external unit.
>
> The only down side is the lower output of the internal unit. (10Watts vs 25Watts of the external transvertor)
>
>
>
> Jeff Cochrane - VK4BOF
> Innisfail, QLD, Australia
> Elecraft K3# 4257
>
>    ----- Original Message -----
>    From: Adriano Perazio
>    To: [hidden email]
>    Sent: Thursday, November 04, 2010 6:54 PM
>    Subject: [Elecraft] K3 Transverter / 2m unit
>
>
>    Hello elecrafters
>
>    Thinking about the 2m external transverter or the internal unit. Wich
>    one is better ? Worth ? Or maybe just another rig like 857 ?
>
>    Tnx
>
>    PY2ADR
>    ______________________________________________________________
>    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
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>
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[Jeff Cochrane - VK4XA]

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[David Pratt]

Adriana & Lexa -
I have both the external XV144 and the internal K144XV.  While they both
have their advantages and disadvantages it all depends on what you want
to use them for.

For frequency stability the XV144 (with crystal oven) is far superior
although Elecraft are currently doing some work towards reducing the
drift in the K144XV. The internal transverter is fine for FM but I am
finding the frequency drift of mine is unacceptable for CW or SSB unless
your overs are very short.

I understand that Elecraft are planning to provide a facility to lock
the oscillator of the K144XV to that of the K3 which will cure the drift
problem.

To sum up, as things are at present, it's the XV144 for performance but
the K144XV for convenience.

73 de David G4DMP

In a recent message, Alexandr Kobranov <[hidden email]> writes
>
>As I am now to decide to buy K144XV or stay with some external -  let
>me ask here:
>
>What is thermal stability of internal 116/118MHz Xtal osc?
>I mean some experience with JT data mode in EME or similar. Is there
>some drift on 144MHz signal (during longer TX period) and how much if any?
>
>Thanks for any practical experience,



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[Alexandr Kobranov]

Thanks David,

it is as I suppose to be - I will wait for PLL add-on to K144XV for my
purposes, no problem as I have stable external now (home made with
DB6NT "heater" on Xtal).

Thanks for your report,

Lexa, OK1DST


Dne 4.11.2010 11:27, David Pratt napsal(a):

> Adriana & Lexa -
> I have both the external XV144 and the internal K144XV. While they
> both have their advantages and disadvantages it all depends on what
> you want to use them for.
>
> For frequency stability the XV144 (with crystal oven) is far superior
> although Elecraft are currently doing some work towards reducing the
> drift in the K144XV. The internal transverter is fine for FM but I am
> finding the frequency drift of mine is unacceptable for CW or SSB
> unless your overs are very short.
>
> I understand that Elecraft are planning to provide a facility to lock
> the oscillator of the K144XV to that of the K3 which will cure the
> drift problem.
>
> To sum up, as things are at present, it's the XV144 for performance
> but the K144XV for convenience.
>
> 73 de David G4DMP
>
> In a recent message, Alexandr Kobranov <[hidden email]> writes
>>
>> As I am now to decide to buy K144XV or stay with some external - let
>> me ask here:
>>
>> What is thermal stability of internal 116/118MHz Xtal osc?
>> I mean some experience with JT data mode in EME or similar. Is there
>> some drift on 144MHz signal (during longer TX period) and how much
>> if any?
>>
>> Thanks for any practical experience,
>
>
>

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[Sverre Holm (LA3ZA)]

I remember seeing a QST test of the internal K144XV, I believe it was in August this year, where its large-signal handling specifications were inferior to the external XV144. Please correct me if I am wrong on this, and if not I would like to understand why.