[Elecraft] KX1???

[Johnny Siu]

The construction of the basic KX1 40/20 is not difficult and with less skills than K2.  However, the LPF in the KXB3080 is quite a PTA.  The manual does not give the sufficient forth warning to the builder.  My review in eham net gave the details and areas to be paid attention:
http://www.eham.net/reviews/detail/3586

You would expect a lower power output after the installation of the KXB3080 (before and after comparison with my LP100A and RF probe)
I would be happy to provide further details in the construction if some one is really going for it.
73
Johnny VR2XMC      寄件人︰ Phil Hystad <phystad at mac.com>
 收件人︰ Elecraft Reflector Reflector <Elecraft at mailman.qth.net> 
 傳送日期︰ 2015年05月7日 (週四) 11:54 PM
 主題︰ Re: [Elecraft] KX1???
   
My two bits on the KX1 and 80/30 option…

I built the KX1 40/20 version and I didn’t think it was too difficult.  My only modern era kit building  preparation for the KX1 was building a Norcal 40A.  Although I wound my own toroids for the Norcal 40A, I chose the option of buying the ready made toroids for the KX1 (from the vendor whose contact info is on the Elecraft site).  Winding the toroids was the only part of the kit-building that I didn’t like doing when I did it with the 40A.

I purchased the 80/30 kit primarily to get the 30 meter band but I had Don, W3FPR, do the 80/30 kit add on and he did his usual excellent work.  I have used the 80-meter portion only to check into an 80-meter CW net under QRP power a few times but using my home QTH and regular 80-meter dipole.

Although every now and then I use the KX1 just for kicks, I usually rely on my KX3 for portable QRP operations.  Actually, I even fired up the Norcal 40A last week for just a single contact just to make sure that it still worked after cleaning the dust off of it.

My KX1 though does work on 80 meters and I did not have much trouble matching the antenna but it was with using a very descent antenna whose normal area of lower SWR was around 3560 KHz where I made my net contacts.  I have never used the KX1 in portable operations with a compromise wire antenna and I probably never will.


73, phil, K7PEH


> On May 7, 2015, at 8:11 AM, KENT TRIMBLE <k9ztv at socket.net> wrote:
> 
> In my opinion, the KX1 is a neat little package. But understand from the outset that it was designed for sleeping bags, picnic tables, and short-term fun.  If your intended use falls elsewhere, buy elsewhere.
> 
> I would not recommend it for inexperienced builders or those with failing eyes and/or shaky hands.
> 
> The 80/30 modification kit requires care and concentration.
> 
> When completed, however, it's a satisfying piece of work, brilliantly designed.
> 
> The builder's greatest dilemma involves the antenna connector . . . deciding what kind of antenna to attach.  The success of any QRP installation lies with the antenna.  Spend twice as much time and effort in researching that issue as you do in building the rig itself.
> 
> 73,
> 
> Kent  K9ZTV
> 
> 
> On 5/6/2015 10:44 PM, Alan KB7MBI via Elecraft wrote:
>> A good friend of mine is interested in purchasing a KX1  primarily for use
>> on 80m. He would like to chat with someone who is familiar  with the radio
>> before buying one especially the 80m coverage .
>>  You can reach Jim W7LS directly _w7ls at blarg.net_ (mailto:w7ls at blarg.net)
>>  Thank you
>>  Alan KB7MBI
>> 
> 
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