100W power amplifier for KX3 as modular kit
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The Elecraft KXPA100 amplifier is a 100W power amplifier suitable for use with most QRP radios. It has been designed with the KX3 in mind but any radio with 5W output can be used.
KXPA100-K is the kit version without ATU and comes supplied as a modular kit (no soldering required).
KXPA100 features include:
•100 W output on 160-6 m with 5 W input typical
•13.8 VDC powered; 20 A typical current drain (11 V with lower output. 15 V max)
•7 lbs with optional KXAT100 installed. 10 x 5.125 x 4.25"
•Compact unit ideal for both desktop and mobile use
•Solid-state diode T/R switching — fast, silent T/R and QSK
•Large convection-cooled heat sink for reliable and quiet operation
•Modern design with rugged MOSFET output stage
•Internal wide-range automatic antenna tuner option (KXAT100 ATU option)
•Second antenna jack provided with KXAT100 ATU option; controlled by KX3's ANT switch
•Fast, bright LED bar graphs for power and status; KXAT100 ATU option adds SWR bar graph
•Seamless integration with the Elecraft KX3 transceiver (requires KXPACBL)
•Works well with any low-power transceiver, requiring only RF and PA KEY inputs
•RF-based frequency counter automatically switches bands with any rig
•Optional band-data input support the K3/10, KX3, Yaesu FT-817, Icom IC-703, and other rigs
•Dual APP power connectors for additional friction-fit if needed (mobile); optional daisy-chaining of 13.8 V to power rig
•Optional KXPACBL adapter connects KX3 to the KXPA100 with a single cable for keying, band data, and control
•KXPA100's PC port allows use of remote-control and logging applications with the KX3 without software configuration changes
•KXAT100 internal ATU option matches 10:1 SWR (5:1 typical on 160 m and 6 m); uses Elecraft's fast matching algorithm
•KXAT100 ATU settings saved per band, per band segment, and per antenna for instant recall
If you are using a KX3 with your KXPA100, you must load the latest KX3 firmware (MCU 1.76 or newer) before use.
Depending upon what radio you are using, decides what additional leads you need.
KX3 - You will need the KXPACBL
KX2 - You will need the the KXPACBL plus the KX2ACBL
FT-817 - You will need KXFT817CBL
*Please note that picture shows KXPA100 with optional KXAT100 installed