Hi all,
Since the subject of both JT modes and heatsinks cropped up recently in
the same Elecraft digest, I will share that my JT customers are very
happy with the increased frequency stability after installing the
PAE-Kx31 heatsink. Several say they can now use JT65 in contests at
10-12 watts which they could not without the heatsink. This is due to
removing most of the heat from the PA FETs to the air instead of letting
it soak into the KX3 case.
In a KX3 without a heatsink the case becomes much warmer, and this heat
conducts and radiates into the xmtr circuitry, which can induce
frequency drift. The extended temperature compensation can help reduce
the drift as well, and I recommend it with or without a heatsink. It is
important to know the KX3 does not need a heatsink to meet all of its
stated specs, but decreased frequency drift and increased key-down time
at 12 watts is a nice bonus for digital modes.
Thanks go to Elecraft for allowing commercial posts on occasion, and
where they may be helpful. I will not abuse the privilege!
Cheers & 73,
Howie - WA4PSC
www.proaudioeng.com
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