Thanks for the product comparison.
Looked into the KPA500.
Someone wanting basic features will go for Ameritron to get the best dollar per watt.
But the Elecraft has some interesting features:
Automatic band change via high-speed RF sensing, switches very fast.
Accurate 3-color LED power and SWR bar graphs, but with a peak hold feature that actually works
Digital LCD display shows Band in MHz, HV, IP, TEMP of finals, SWR, RF OUT, plus a menu of customizable settings such as LED / LCD brightness.
Fast QSK without clicking for CW users.
Four speed fan.
When comparing amps, pay attention the the finals it uses. The 2933 pills are much better than MRF150. Worth the higher price.
In all cases, be careful of radios that have overshoot on start of transmit. Some radios have a few milliseconds of full output power before they back off. Such as the icom HF mobiles.
