The need for 220 VAC is a very good point, Ray.
Operating from 110 VAC has always been a
constraint for me, and likely for many of us. Of
course, I'm less "serious" than some hams -- and
since the mid 90s QRP has been a focus of mine.
I sure do like having the KPA/KAT500 duo and the
ability to kick it on line by simply pressing the
Operate button. My last amp, an AL-811H, was far
more work to use and got little use as a result.
73, Phil W7OX
On 12/24/14 8:00 AM, Ray Sills wrote:
Another consideration for a KPA1000, would be
the almost certain need for 220V power. Fine
and dandy if it's already in the shack, but
certainly an extra cost. Sure, you can run a
1KW room heater from 110V... so what if the line
voltage sags to 100V on that circuit.. the
heater will just deliver a bit less heat. Or my
vacuum cleaner (which draws 12 A) works fine on
about 110V. But, a linear amp will want to see
a pretty stiff power supply to maintain linearity.
500 W is pretty much OK on household 110 V
branch circuits. And, as others have pointed
out... the whole amp with power supply fits into
a K3 sized case. Pretty slick engineering, I
say. But, I'm a QRP guys, so all this
discussion is a theoretical item for me. :)
73 de Ray
K2ULR
KX3 #211
ARL sixty one
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