[Elecraft] K3: 630m amplifiers

[Tom Azlin W7SUA]

Hi Ed.

I am more interested in a non-linear class C or higher amp for those 
bands as was not thinking to run modes that need a linear amp. WSPR, a 
WSJT mode, WSQ, and the like.

73, tom w7sua
Chino Valley AZ

On 7/26/2015 1:23 PM, Edward R Cole wrote:
> With the recent expansion of use to 630m for the K3s and upgraded K3
> which only transmit at nom 1mw, a question arises:
>
> Is there interest in a linear amplifier taking 1mw drive to produce
> either 25w or 100w?
>
> I pick those two power outputs because with typically inefficient
> antennas on 630m 25w => 1w ERP and 100w => 5w ERP (approx).  These two
> ERP are mentioned in the WARC-12 band approval and FCC as possible max
> allowed power levels.  Currently the ARRL Experimental Group is approved
> at 20w ERP but there are not many stations running that in the group.  I
> run 100w with 0.1mw drive from my K3 for approx 3w ERP.  1mw is typical
> output for mixers so the amp would be usable by low-power transverters,
> as well.
>
> I am wondering what kind of interest there would be for a linear amp
> that could be driven by the K3s/K3?  I would probably have an optional
> Rx preamp in such a package.  No idea of cost at this juncture as its
> just in "maybe status".  Wayne has stated to me that Elecraft is not
> intending to build such due to the limited market.
>
> 73, Ed - KL7UW
> http://www.kl7uw.com
>      "Kits made by KL7UW"
> Dubus Mag business:
>      dubususa at gmail.com
>
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