Post : Cooling the Yaesu FT-817 for digital modes
URL : https://ve3eby.wordpress.com/2016/11...digital-modes/
Posted : November 23, 2016 at 8:55 am
Author : ve3eby
Tags : amateur radio, FT817, Ham radio, heat sink, JT65, PSK31
Categories : Digital, QRP

From Kevin, KB9RLW

A simple trick to keeping the FT-817 cool while running 100% duty cycle modes
like JT65, PSK31 etc. You can get away with 5 Watts safely. The finals should
be ok with the duration. They are 2SK2975 MOSFETs. From the spec sheet, they
are rated at 10W dissipation when mounted to a heat sink.
Obviously you still need to be careful. Back to back digital QSO's in a
contest could still heat it up over time.

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