[Elecraft] KX2 Matching Power Amplifier

[Walter Underwood]

You just described the HF Packer Amp.

http://www.hfprojects.com/#!/miniHFPA-HF-Packer-Amp/p/80855866/category=0 <http://www.hfprojects.com/#!/miniHFPA-HF-Packer-Amp/p/80855866/category=0>

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Apr 6, 2017, at 12:42 PM, Bert Garcia N8NN <n8nn at earthlink.net> wrote:
> 
> The KX2 is recommended to operate at 5 watts and below for digital modes.  When operating QRP, you are often at the noise level on the receiving end, especially with compromise antennas.  Any improvement, even 5 dB, will make the difference between being heard or not.  My primary design goal for a KXPA35 is low cost, thus I suggest a modest power level, no SWR/wattmeter, a manual bandswitch, and any other cost savings that can be had.  Those wanting a full gallon of 100 watts with all the cool features Elecraft has to offer can opt for the KXPA100, a truly fine amplifier in all respects.  Rather than a fancy pair of shoes, I'm just looking for a pair of flip-flops.
> 
> Bert N8NN
> 
> -----Original Message-----
> From: Mike Morrow [mailto:kk5f at earthlink.net] 
> Sent: Thursday, April 6, 2017 12:33 PM
> To: n8nn at earthlink.net; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KX2 Matching Power Amplifier
> 
> 
>> I'm enjoying my new KX2 transceiver!  I'd like to see Elecraft make a 
>> matching RF amplifier with about 35 watts output with 5 watts in.
> 
> Since the KX2 runs 10 watts out, more or less, you're asking for external gear to run only 5 dB better.  I wouldn't consider something like that for even a moment.  The existing 100 watt amp is likely the minimum increment that would be almost worth the trouble.
> 
> A subsequent post about using a T1 ATU on the output of a 40 watt external amp seems ill-advised, especially for such minimal practical benefit.
> 
> I'd prefer to see an enhanced KX3HP (not KX2) with KXAT3HP capable (only with stout 14 vdc external power) of the 35 watts you seek.  It would sell as a unified package that is the buyer's only choice, but not as multiple components.  Still ... the benefit for the effort would not be there.
> 
> Mike / KK5F
> 
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