[Elecraft] KXP-100/KX-3 integration

[Terry Griffey]

I have used my KX3-KXPA100 combo off and on in many parks over the years. I usually run CW and SBB about 40-50 watts and FT8 about 10 watts. I run the two units, a small 12v fan to cool the amp in the Texas heat and 12v-5v converter for my phone from a homebrew Powerpole distribution box powered by a single Bienno 1220 20AH battery.  With this configuration I get about 6 hours of service. I have a 60-watt converter in the box to power my MacBook Air via USB-C, and if used, lowers the time to less than 5 hours. Another factor is the amount of time running FT8. It’s duty cycle is very power consuming.

Terry - KG5OWB

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> Message: 6
> Date: Tue, 8 Jul 2025 01:59:42 +0000 (UTC)
> From: mjrosen <mjrosen at cox.net>
> To: <Elecraft at mailman.qth.net>
> Subject: [Elecraft] KXP-100/KX-3 integration
> Message-ID: <1749158500.1143383.1751939982285 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
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> I have the?KX-3. Considering adding the 100W amplifier which will only be used in the field. Not SOTA or hiking, car trips for POTA and, vacation use. I have a 20AH Bioenno battery that more than adequately powers KX-3 at 10-15W for QRP activations. I've considered 2 options: 1. Geta a higher capacity battery and run both radio and amp from one battery (think the 20AH will do?)?via the parallel power pole connection on the amp or 2. Just getting a separate battery for the amp. what are other folks' set ups? I seldom?on the air for more than 4 hours as the family/ spouse?looses patience. Thanks, Marc KM7AZ
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