[Elecraft] KX3 Heat Sink

[Walter Underwood]

From the Elecraft site, "KX3 Heatsink Upgrade Kit. Started shipping with S/N 7292 for kits, S/N 7255 for factory assembled. $39.95”

http://www.elecraft.com/order_form_parts.htm#kx3

Upgrade instructions are here:

http://www.elecraft.com/manual/E740254%20KX3HSMDKT%20Heat%20Sink%20Installation%20rev%20A.pdf

wunder
K6WRU
Walter Underwood
CM87wj
KX3 #2985
http://observer.wunderwood.org/ (my blog)

> On Aug 4, 2017, at 4:47 PM, David Haines <dhaines at bates.edu> wrote:
> 
> Wayne.  What serial number did you first install the new heat sink on the KX3?
> 
> 73,
> David
> KC1DNY
> 
> On 8/4/2017 7:42 PM, Wayne Burdick wrote:
>> David,
>> 
>> The new heat sink roughly doubled key-down time in our lab tests. I’d suggest you try it as-is before investing in a third-party heat sink. I use RTTY at full power on my KX3 with just the new stock heat sink and have never had an issue.
>> 
>> 73,
>> Wayne
>> N6KR
>> 
>> 
>>> On Aug 4, 2017, at 2:08 PM, k1szo at k1szo.com wrote:
>>> 
>>> Hi Jim,
>>> 
>>> I recently purchased my KX3 and intend on doing a lot of digital modes.  I looked into 3rd party heatsinks, but was notified that Elecraft uses a new improved heatsink that wraps around the bottom of the KX3.
>>> 
>>> So my question to you is, do you have the newer KX3 Elecraft heatsink or the older model?  I was going to work mine first to see how hot it gets before making a move if the newer heatsink is acceptable.   I can't find any reviews of it.
>>> 
>>> I will definitely be watching this thread to figure out if I too want to purchase the 3rd party Pro Audio Engineering KX32 Ultimate Heatsink as a replacement.
>>> 
>>> Regards,
>>> David ~ K1SZO
>>> 
>>> On 2017-08-04 14:10, Jim Ruff via Elecraft wrote:
>>>> 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.  The KXPA100, while warm, appears to be okay.
>>>> Should I consider purchasing a heat sink for the the KX3? If so, what
>>>> products in your opinion are the best?
>>>> Thanks,JimW7JHR
>>>> Sent from Yahoo Mail. Get the app
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