Re: IRF510 amplifier failures

KD8CGH
 

I was looking at the data sheet from Mitsubishi for their RD15HVF1 and in the electrical characteristic table on page two it says:
   Parameter                                      Conditions                    Limits
Load VSWR tolerance              Load VSWR=20, ...             no destroy
                                                VDD=15.2V, Po=15W

If I am reading this correctly it looks like at over voltage and high power out it is expected to survive a VSWR of 20.

https://www.rfparts.com/rftransistors/transistor-rd/rd15hvf1.html

with friend google I also found  https://groups.io/g/QRPLabs/message/13357

Wouldn't it be better to change to a RD15HVF1 for high VSWR rather than add circuits, even if the RD15HVF1 did not yield substantially better uBitx power performance at higher frequencies?

    Bob   KD8CGH

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