[Elecraft] K3 Transverter / 2m unit

[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 <kobranov at amoscz.cz> 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,
>
>
>