Hi Jan,
Elecraft designed the KX twins to run with maximum efficiency, so up to
10 watts, it is the more efficient PA in the KX3 which supplies the
output power with the KXPA100 in bypass, and when more than 10 watts is
dialed in the KXPA100 is enabled, and the KX3 throttles back to make the
OH ~ I think we all understand that the word "heat-sink" implies that it
might/will get warm :-)
BUT ~ I originally asked about the "heating" of the KX3 when driving
the KXPA100 at 20W
SO ~ I experimented this morning with adjusting the power OUT of the KX3
while driving the KXPA100 amplifi
Sorry of this appears twice, I got a bounce on the first submission:
The Pro Audio Engineering Kx32 Heatsink has more surface area than any
other commercially available KX3 heatsink. Regarding mass, more is not
necessarily better. If you take two heatsinks with the same surface
area, on the
Actually, that’s 63 C at the PA device location on the PC board. The outside
surface of the heat sink itself is quite a bit lower in temperature.
Wayne
N6KR
> On Aug 6, 2017, at 11:39 AM, Wayne Burdick wrote:
>
> The KX3 and KX2 max heat sink temperature is 63 C. At that point power is
> aut
The KX3 and KX2 max heat sink temperature is 63 C. At that point power is
automatically dropped to 5 W. If it reaches the max temp again, transmit is
exited.
Wayne
N6KR
> On Aug 6, 2017, at 10:27 AM, Jim Brown wrote:
>
> A well designed output stage SHOULD be hot to the touch. The temperatu
A well designed output stage SHOULD be hot to the touch. The temperature
component of protection in Elecraft output stages seems to kick in when
the internal temperature approaches 70 deg C. You can see this, for
example, by watching temperature in the KPA500 and listening to fan
speed. The fu
I'm puzzled by the comment posted yesterday: by Jim W7JR
""I've been doing a lot of FT-8 using my KX3 and my KXPA100 at 20 watts,
and have noticed that the KX3 is heating up quite a bit and is almost
hot to the touch""
Why should the KX3 be heating up, when the AMP is running only 20W ?
Is the
7 matches
Mail list logo