[Elecraft] KX3 and Heatsink

[Walter Underwood]

Instructions are here. Doesn’t look difficult.

https://ftp.elecraft.com/KX3/Mod%20Notes%20Alerts/E740254%20KX3HSMDKT%20Heat%20Sink%20Installation%20rev%20B.pdf <https://ftp.elecraft.com/KX3/Mod%20Notes%20Alerts/E740254%20KX3HSMDKT%20Heat%20Sink%20Installation%20rev%20B.pdf>

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

> On Jun 13, 2022, at 7:36 PM, Eric Norris <norrislawfirm2 at gmail.com> wrote:
> 
> How difficult is it to install the later factory heatsink on an early KX3?
> 
> 73 Eric WD6DBM
> 
> On Mon, Jun 13, 2022, 5:20 PM Don Wilhelm <don at w3fpr.com> wrote:
> 
>> Bill,
>> 
>> If you run 12 watts on AM, FM and digital then the supplied heatsink
>> (assuming it is the newer heatsink the wraps around the bottom of the
>> KX3) then it should be adequate.
>> If you want to run the full 15 watts on those modes, I would suggest
>> adding the Pro Audio Engineering heatsink for additional cooling of the PA.
>> 
>> Early versions of the heatsink had only a plate on the back which was
>> adequate for 12 watts on low duty cycle operation - Tx for 2 minutes and
>> then a RX period of about 3 minutes or more.
>> 
>> The KX3 will protect itself by reducing power if it gets too hot.
>> 
>> 73,
>> Don W3FPR
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