Why use another heat sink ?
On Sunday, March 29, 2020, 11:16:31 AM EDT, Tim McDonough N9PUZ
wrote:
I'm curious, have people been seeing these high tempts indoors or
outdoors? I notice a significant temperature difference with my KX2 when
operating outdoors by just keeping it in the
I'm curious, have people been seeing these high tempts indoors or
outdoors? I notice a significant temperature difference with my KX2 when
operating outdoors by just keeping it in the shade. I do have a third
party heatsink.
Tim N9PUZ
Hi,I have a KX3 in the 600 s/n range. There was a enlarged heatsink kit for
radio's under 7500 s/n which doubled the time for the PA's to cut back. It's
still listed on Elecraft's web site. Easy to install, no soldering.
73Jim HK7sss
In a message dated 3/27/2020 8:39:00 AM Pacific Standard Time,
It does sound like the KX2/KX3 are pretty tough little radios. I had heard
of some heatsink issues in earlier KX3s, not sure if that is true or not.
It sounds like 61C is fine. For the record the time that it got that hot
running 10 watts was SSB and I was doing a continual (recorded) CQ. I only
FWIW, my KX3 handles 15 watts digital with no issues as far as I can tell.
I did the temperature compensation and have a third party heatsink, though.
I haven't looked too much at third party heatsinks for the KX2 but I
imagine I'd probably want to follow that 50% advice even with one installed
KX2 manual, page 27: "5.0 watts or lower is recommended in all data modes. The
KX2 will reduce power, if necessary, to maintain a safe operating temperature."
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Mar 26, 2020, at 10:45 PM, Joan via Elecraft
>
The other thing to watch is the frequency stability. When I used to
run digital modes on the KX3, the radio would drift a bit as it heated
up. I got one of the XG50 reference oscillators, and went through a
temperature compensation profiling procedure, and after that it worked
very well. I guess
The KX2 will automatically fold back its power (responding to temperature) to
prevent thermal runaway or damage to its finals
That being said, it is routinely recommended that when running any 100% duty
cycle mode (e.g. typical digital text modes or FM Phone) one reduces RF output
to 50% of
Thank you for the feedback. I have never seen the radio get that warm
during my operating. Someone did point out about the third party heatsinks
available so I may eventually purchase one. I primarily am doing very high
duty cycle modes such as RTTY and the JT modes with my KX2 so I want to
I believe the radio might shut down somewhere above 80 C.
Sent from my iPhone
...nr4c. bill
> On Mar 26, 2020, at 9:11 PM, Steve Anness wrote:
>
> This question was posed last October by another on the reflector in regards
> to the KX3 but does not look like there was a response. I had
I do not have KX2 but KX3.
KX3 internally set a PA temperature limit at which KX3 automatically reduces
power output.
Assuming that KX2 and KX3 are very similar, unless your KX2 automatically
reduces power output, the PA temperature is within the safe range.
I think running FT8 with 5W output is
This question was posed last October by another on the reflector in regards
to the KX3 but does not look like there was a response. I had posed the
question once to Elecraft support and believe my email got lost in the
fray. When I posted the question to Elecraft support it was a month after
I
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