KX3 Output power rating

[Elecraft mailing list]

The KX3 is now being positioned as the 15 watt big brother to the smaller KX2 “up to 10 watts” version. The upper
limit on my KX3 power adjustment seems to have always been around 10.2 watts. How does one safely achieve this
15 watt performance? Does it require the new/upgrade heatsink plus a new firmware version? I have always used an
approx. 14 Volt power source.

I’m sure this has been addressed before but I don’t see the history…thanks for any observations.

alan/K6ADG
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[Ken Arck]

You really worried about 1.67 dB?


At 10:16 AM 5/27/2016, Alan Geller via Elecraft wrote:

>The KX3 is now being positioned as the 15 watt
>big brother to the smaller KX2 “up to 10
>watts” version. The upper limit on my KX3
>power adjustment seems to have always been
>around 10.2 watts. How does one safely achieve
>this 15 watt performance? Does it require the
>new/upgrade heatsink plus a new firmware
>version? I have always used an approx. 14 Volt
>power source. I’m sure this has been addressed
>before but I don’t see the history…thanks foor
>any observations. alan/K6ADG
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[wayne burdick]

The latest firmware is required; it will allow you to use up to 15 W on 80-20 m (10 W elsewhere).

The upgraded heatsink is optional. On my lab KX3 I can put out 15 watts for several minutes before hitting the temperature limit, at which power is reduced by firmware.

73,
Wayne
N6KR


On May 27, 2016, at 10:16 AM, Alan Geller via Elecraft <[hidden email]> wrote:

> The KX3 is now being positioned as the 15 watt big brother to the smaller KX2 “up to 10 watts” version. The upper
> limit on my KX3 power adjustment seems to have always been around 10.2 watts. How does one safely achieve this
> 15 watt performance? Does it require the new/upgrade heatsink plus a new firmware version? I have always used an
> approx. 14 Volt power source.
>
> I’m sure this has been addressed before but I don’t see the history…thanks for any observations.
>
> alan/K6ADG
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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