Mike WA1MAD wrote…
The 1.5 watts on AM sounds relatively safe. Not sure how much of the 5 watts max might cause the finals damage.
In the past, I used an Elecraft T1 auto-tuner and the FT-817 survived that. I recently picked up a manual QRP Z-match tuner with an absorptive bridge, so the radio never sees a match worse than 2:1 while tuning. The radio should be pretty happy with that.
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73 Keith VE7GDH