The KPA500 features 160-6M coverage, instant RF-based band switching with any radio, alphanumeric status display, bright LED bar graphs, and a rugged, internal linear supply.

The amp’s manual band switches may be used to directly change bands on the K3S. Also, the K3S can even select per-band amplifier drive levels automatically when the amp is placed into operate mode, so you’ll rarely need to adjust power output.

But the KPA500 is not just limited to use with the K3S – it is fully compatible with most radios. (Only amplifier keying (PTT) and RF are required for operation including instant RF frequency sensing, fully automatic band switching.)

Features

• 500W, Compact, Solid State FET amplifier for 160-6 m
• Works and auto band selects with any radio that provides Key-Out and RF signals
• Weight: 26 lbs, 12 kg
• Internal low noise linear power supply: 100-120, 200-240 VAC, 50/60 Hz operation
• Instant-on operation
• Intelligently reduces power by 2.5 dB temporarily when presented with input overdrive or a high SWR
• Excessive overdrive or SWR events instantly place the amp safely into protective stand-by
• Ultra-high-speed QSK. Silent, diode switched T/R
• Can receive band data information from most radios that supply it
• Fully remote controllable
• Six-speed temperature sensing fan
• KPA500 band buttons drive the K3S band and drive level
• Band data is sent from K3S to KPA500 before TX
• PTT included in cable, external PTT cable not required