[Elecraft] KX3 and Heatsink

[Rich WC3T]

I have the latest revision stock heat sink and nary a thermal issue. Ever.  

72,
Rich Hurd / WC3T / DMR: 3142737  
Grid: FN20is
Bureaucracy is always in search of self-preservation.  — AA7BQ

> On Jun 13, 2022, at 22:47, Walter Underwood <wunder at wunderwood.org> wrote:
> 
> 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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> 
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