On 2019-11-04 6:20 PM, Wayne Burdick wrote:
At home, use 13.8 to 14.2 V for lowest IMD. In the field, the K3 (and
now, the K4) automatically scales maximum power output based on
supply voltage, and can run down to as low as 11 V.
It is a shame that the maximum power output along with bias levels and
transformer ratios were not selected for lowest obtainable IMD. Output
power (100 W) became the only specification that counted even though
60 W would have been enough to drive the KPA-500/KPA-1500 with truly
outstanding IMD.
73,
... Joe, W4TV
On 2019-11-04 6:20 PM, Wayne Burdick wrote:
Hi all,
We've chosen to have the K4 continue to be a field-capable radio, inheriting
the characteristics that have always made the K3/K3S (and the K2 before it) the
preferred rig for FD, DXpeditions, and multi-transmitter stations. Thanks to a
lightweight but rigid internal aluminum frame, the K4 weighs only slightly more
than the K3/K3S, while integrating in a large LCD in a way that increases width
by less than 3 inches. (Unlike on many rigs, our front panel includes separate
optical encoders for VFO A, VFO B, and RIT/XIT.)
Current drain of the K4 is half that of most competing high-performance desktop
radios, so it can be used with emergency power. At home, use 13.8 to 14.2 V for
lowest IMD. In the field, the K3 (and now, the K4) automatically scales maximum
power output based on supply voltage, and can run down to as low as 11 V.
73,
Wayne
N6KR
On Nov 4, 2019, at 3:07 PM, Buck <[email protected]> wrote:
Perhaps the K4 should have been a 40V radio and the K3S remain as the 12V "portable" or
"field" version.
k4ia, Buck
K3# 101
Honor Roll 8B DXCC
EasyWayHamBooks.com
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