[TenTec] [Q] Temp ctrl Fan available?

[Kenneth Hopper]

For long key down sessions TenTec recommends a fan for cooling the
heatsink. Has anyone ever seen a temp controlled fan for sale that
clips onto the heatsink?  I want to run RTTY and thought it would be
a good add-on - but I can't find one for sale anywhere. 

http://www.cyberguys.com/ sells cooling fans for hard drives in PC's.
Some of the fan assemblies have a temp sensor etc.

Has anyone adapted a fan from a PC for this purpose?
TNX,
Ken N9VV

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