For contesting in Europe ( I stress Europe because it is quite different to
other areas of the world) on 144 MHz you generally need very good strong
signal handling and good selectivity as there are many stations running several
hundred kW ERP often within line of sight of you. Imagine a mountaintop station
with 16 yagis stacked often arranged to cover 360 degrees and running 3kW PEP
output as some are permitted to do. Most normal transceivers even with fairly
good transverters will fall apart under those circumstances. I have encountered
receive systems that couldn't handle a line of sight station that was running
100 watts and a single antenna without overloading.
You don't say how serious you are in 144 MHz contesting, and whether you
already own a K3 or a KX3 and whether you already have the XV144 transverter,
so it is difficult to know what your question is and give you an answer.
The K3 would certainly be the better contest radio, though of course more
expensive once you load it is with filters. The nice thing is you can add just
the options you require, if you don't need HF and 100 watts etc.
However there are better transverters available for contesting on 144 MHz than
the XV144. There is the very expensive Kuhne TR 144 H , and the M+E ME2T Pro
from HA1YA. The very best is needed for serious contest use.
If you want to build something there is the Javornik. Now we have the G4DDK
Anglian transverter kit available which is also good by all accounts. GM3SEK
has recently built an Anglian transverter and PA -inside- his K3/10. The
Anglian LO can be injection locked to 10 MHz too.
HA1YA also makes banks of IF switched xtal filters that go between the
transceiver and the transverter at the IF to further improve strong signal
handling when you have close strong signals in contests.
I live on the extremity of Europe and have only a few local strong signals to
contend with, so rarely encounter huge problems with receiver overload, more
commonly it is the poor quality of transmitted signals that causes problems (
IMD from over driven amplifiers and transmitted wideband phase noise from
poorly designed systems). So I am happy with my KX3 with an ME2T Pro
transverter at 14 MHz IF. However if I lived in Central Europe I would probably
need something a little better and would certainly consider the K3S.
Having the PX3 panadaptor is also nice for finding stations (search and pounce)
on the band, it also shows very graphically the difference between a good
narrow SSB signal and one that is being over driven and splattering.
73
David Anderson GM4JJJ
> On 4 Nov 2015, at 10:32, Samir Popaja <7...@comhem.se> wrote:
>
> Hello,
>
> Is any difference between those two combo in prestanda for contesting?Will
> use only for contesting in Europe...
>
> Skickat från min iPhone
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