[Elecraft] KX3 WSPR and heatsinks

[Phil Wheeler]

Mike,

You must do the extended temp calibration before 
doing any digital modes; that's a given. KX3 is 
fine for CW and SSB without it -- and it takes 2-3 
hours to do (not complex, but you have to cool 
then heat the rig), so if they did it at Elecraft 
they'd have to add that to the cost of the rig.

Heat sinks: There are several out there. That one 
at eBay looks a bit "thin", and no telling about 
the quality of machining, etc. But the price is 
attractive.  My choice early on (when there were 
only one or two options) was this one 
http://www.ve7fmn.ca/ Cooler KX.  There are some 
reviews of it here 
http://www.eham.net/reviews/detail/11702

Definitely more expensive but you really know what 
you're getting -- good, deep cooling fins and 
plenty of mass with a heat sink that is 
well-machined and mounted.

73, Phil W7OX

On 12/26/14 7:16 AM, Mike Sanders wrote:
> Thanks to those who responded. I will try the calibration mentioned by Dave
> below first. It may do the job. 73 Mike
>                   
>
>                                                            GOD BLESS AMERICA
>                                      KØAZ    Mike Sanders   EM37cd
> www.k0az.com
>                                                               SouthWest
> Missouri
>
>       
> Don't overlook doing the extended temperature calibration procedure
> http://www.elecraft.com/manual/KX3%20Custom%20VFO%20TC%20rev%20A9.pdf
>
> I've done it on a small number of KX3's and the improvement in thermal
> stability is considerable.  If you haven't run it before, it's time
> consuming so be patient and be prepared to re-run it as it's easy to make a
> small mistake.  I also had issues with getting it to work on one of the
> KX3's (mine, naturally) after running straight through on the others.  It
> couldn't all have been finger trouble, but after multiple, patient re-runs,
> it went through and my KX3 is now remarkably stable over a wide temperature
> range.  It was well worth the effort.
>
>   
>
> Season's Greetings, one and all.  73 Dave G3TJP
>
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