K3 is said to be having a better DSP filter than its competitors. Therefore,
even for CW operation, the DSP could further narrow the BW hence additional
crystal filter such as 400Hz may not be necessary under most of the
circumstances.
KAT3 is necessary. Under most circumstances, ATU can both act as a preselector
and an additional protection between the radio and antenna.
No matter whether I have a matched antenna, I always engage KAT3 and don't mind
the tiny insertion loss. In case, there were something wrong with my antenna
which I did not realise, I could sacrifice my KAT3 to save the radio.
I do not favour the proposition of no ATU for a matched antenna.
cheers,
Johnny VR2XMC
________________________________
寄件人﹕ Arie Kleingeld PA3A <p...@xs4all.nl>
收件人﹕ elecraft@mailman.qth.net
傳送日期﹕ 2011/1/5 (三) 6:24:11 PM
主題： Re: [Elecraft] K3: advice about options to buy?
John,
No need for the high stability reference. The basic one is also a good
piece of work.
The 2.7 filter is fine in ssb.
For CW/data add a 400Hz roofing filter or so (depending on your normal
operating BW). You will need it in a busy band.
(My 2cts worth)
73
Arie PA3A
Op 5-1-2011 10:11, VK7JB schreef:
> Hello group,
>
> My mouse is hovering over the "Add to Cart" button for a K3/100 modular kit.
> I'd really value some candid advice about options before I commit.
>
> My situation: I'm a casual operator, data modes, SSB and CW. I rarely need
> to contend with crowded bands and don't currently work contests. I built a
> K2/100 which I love. I intend to get the General Coverage BPF module and
> the KAT3.
>
> My question: Given my situation, would I benefit from the extra investment
> in the KTCX03-1 high stability reference oscillator and/or the 2.8-2.7
> filter swap option?
>
> About filters: which would you recommend I buy, given my casual-mode
> operation? I anticipate working more CW and less phone as I become more
> proficient in CW.
>
> Thanks in advance for any advice. I have had a look through the archives:
> there's a lot of info but I'm still uncertain.
>
> John
> VK7JB
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