KX3: Power Consumption at 15W?

[Tom Crayner]

Anyone happen to know power consumption of the KX3 when running at the
relatively new 15W RF output setting?

I had read a while back that it was around ~2.1A at 10W.  Looking at tiny
power supply options and don't want to underrate.

Tom, W2YF
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[Don Wilhelm-4]

I recommend a power supply with a current rating of 6 amps or greater
for the KX3 (and K2/10 or any other Elecraft legacy gear).
My reason is that you likely have accessories in the shack that need to
be powered.
Using a power supply that is only marginal for the transceiver is false
economy IMHO.
If you have a 20 or 30 amp power supply available, use it.  There is no
sense in having a marginal power supply just because the transceiver
only draws 2.1 amps at 10 watts.

This advice is for home stations, for portable operation the answer will
be different and depend on the operating aspirations.

73,
Don W3FPR

On 4/5/2016 10:38 PM, Tom Crayner wrote:
> Anyone happen to know power consumption of the KX3 when running at the
> relatively new 15W RF output setting?
>
> I had read a while back that it was around ~2.1A at 10W.  Looking at tiny
> power supply options and don't want to underrate.
>
>

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[Tom Crayner]

Don,

Agree wholeheartedly, when home I connect up to a Rigrunner hanging
downstream off a 35A power supply.

I was looking for something small (portable) to toss in a travel bag when
on vacation.

Tom


On Tue, Apr 5, 2016 at 11:34 PM, Don Wilhelm <[hidden email]> wrote:

> I recommend a power supply with a current rating of 6 amps or greater for
> the KX3 (and K2/10 or any other Elecraft legacy gear).
> My reason is that you likely have accessories in the shack that need to be
> powered.
> Using a power supply that is only marginal for the transceiver is false
> economy IMHO.
> If you have a 20 or 30 amp power supply available, use it.  There is no
> sense in having a marginal power supply just because the transceiver only
> draws 2.1 amps at 10 watts.
>
> This advice is for home stations, for portable operation the answer will
> be different and depend on the operating aspirations.
>
> 73,
> Don W3FPR
>
> On 4/5/2016 10:38 PM, Tom Crayner wrote:
>
>> Anyone happen to know power consumption of the KX3 when running at the
>> relatively new 15W RF output setting?
>>
>> I had read a while back that it was around ~2.1A at 10W.  Looking at tiny
>> power supply options and don't want to underrate.
>>
>>
>>
> ______________________________________________________________
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> Please help support this email list: http://www.qsl.net/donate.html
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>

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[Tim Henrion]

Running my KX3 on a bench power supply with built-in current monitoring, I haven’t seen it use more than 2.5 amps on SSB, when cranked up to 15W.
I use the Pro Audio Engineering PAE-Kx33 power supply for plug-in travel operation, which is good for 4 amps: https://proaudioeng.com/products/pae-kx33-low-rfi-ac-power-supply/
It’s the size of a small laptop power supply and works quite nicely.

Tim - KC1EOQ

> On Apr 5, 2016, at 10:38 PM, Tom Crayner <[hidden email]> wrote:
>
> Anyone happen to know power consumption of the KX3 when running at the
> relatively new 15W RF output setting?
>
> I had read a while back that it was around ~2.1A at 10W.  Looking at tiny
> power supply options and don't want to underrate.
>
> Tom, W2YF
> ______________________________________________________________
> 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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