From the KAT500 manual:
3 - 30 MHz 1000 W into 16 ohms to 150 ohms (3:1 SWR)
1.8 - 2 MHz 600 W into 10 ohms to 500 ohms(5:1 Low Impedance, 10:1 High
Impedance SWR)
30 - 60 MHz 500 W into 5:1 SWR (10 ohms to 250 ohms)
"The cabling diagrams show how to use the KAT500 with any transceiver
and amplifier in the 10 to 1000 watt output range."
I find with mine, in some cases the ATU will resolve a match at 20
watts, but at 500 watts it goes into a FAULT mode. This indicates power
must be reduced to prevent damage as the SWR being resolved is outside
of the power range of the tuner.
In all aspects, with the KPA500 and my antennas, it provides outstanding
performance.
73
Bob, K4TAX
On 11/27/2018 10:39 AM, Don Wilhelm wrote:
Vic,
From what I have heard, the KAT500 will handle 1500 watts, but at an
SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle.
At lower power (its rated power of 500 watts) the KPA500 will tune a
10:1 SWR.
73,
Don W3FPR
On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote:
I am using an older Palstar AT-Auto automatic tuner. It has a coil
and capacitor operated by stepper motors. When it works, it's fine;
but it requires a lot of maintenance and fiddling. What I need is
something that works as well as the KAT3 in my K3; quick,
trouble-free, and good for a 10:1 SWR on HF.
Oh yes, it has to handle 1.5 kW, too.
If Elecraft would beef up the KAT500 to meet the above specs, I'd buy
one.
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