The KPA500 and KAT500 both detect transmitting frequency with as little as a tap on the mic or a dit at 35 wpm, and switch almost instantaneously. All they need is PTT (Amp Key) from the rig to an RCA jack that loops through the KPA500 to the KAT500 with an RCA-RCA jumper. That "loop-through" allows the KPA500 to prevent auto-tuning while the power amp is active. The KAT500 has three operating modes that can be programmed from Elecraft's control program -- Auto, Manual, and Bypass. In general, the KAT500 remembers the last settings you used the last time you were on that band, and for which of the three outputs.

73, Jim K9YC

On 3/6/2019 12:37 PM, Joe Subich, W4TV wrote:
I have
no information about adding the KPA500/KAT500 into the mix as I
do not know if/how the KPA500/KAT500 acquires frequency/band data
from the TS-480.


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