Elecraft KXPA100 Manual - Manual (Page 38)

38
Specifications
KXPA100 Amplifier
Frequency Range Amateur Bands from 1.8 to 29.7 MHz and 50 to 54 MHz
Supply Voltage and Current 12-15 Vdc (13.8 V nominal), at least 24 A peak capacity. About 1 mA
parasitic drain current whenever dc power is connected.
Power Output Max.100 watts at 13.8 V, 1.8 to 29.7 MHz and 80 watts 50-54 MHz PEP
CW/SSB/DATA, ± 1 dB*
Duty Cycle at 100 W Output RTTY/Digital/FM, 60 seconds continuous carrier.
100 watts continuous transmission on CW/SSB with a 50% duty cycle
keying/modulation waveform.
Thermally protected.
Drive Power 3.5 to 7 watts, typical, for 100 W ± 1 dB output*.
Input VSWR 1.5:1 or less.
Metering Front Panel LEDs: Power Out, Attenuator, Transmit Key, Power On.
If equipped with optional ATU: SWR, Antenna connector selected, ATU
mode.
Heat Sink Temperature 60 °C, maximum
Key In +5 Vdc open circuit on receive, closed to ground on transmit (1 mA
maximum).
Efficiency About 50% at 100 watts output.
Weight 5 lb 5oz (2.42 kg) including ATU.
Size See Figure 9, page 39
* Maximum power output, as well as the drive power to reach a given power output, both vary per-band.
Power output available may be reduced if the load SWR is high or supply voltage is low. The amplifier
will protect itself from excessively high input or output power via the 3-dB attenuator or, if necessary, by
dropping into bypass mode.
KXAT100 Antenna Tuning Unit (ATU)
Autotune Power 1.5 Watts, minimum. The KXPA100 amplifier is bypassed during a
tuning operation so only the drive power from the transceiver is used for
tuning.
Typical Matching Range SWR as high as 10:1 at 100 watts; SWR as high as 20:1 at 10 watts.