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I guess it depends on what device you are using and how you are using it. MOSFETs have proven reliability in commercial gear since the early 80's when commercial broadcast transmitters were being made with them. Today they run 50Kw AM transmitters with them and virtually all commercial RF gear uses them. I have a 1.2 Kw amplifier for 6m that uses four MRF151G's which ar3 actually old technology. The amp was originally us3d in a television transmitter where reliability was foremost. No......MOSFET's ARE reliable but you need to use the proper devices and know how they should be run.

[QUOTE="Captain Kilowatt, post: 586409, member: 39"] I guess it depends on what device you are using and how you are using it. MOSFETs have proven reliability in commercial gear since the early 80's when commercial broadcast transmitters were being made with them. Today they run 50Kw AM transmitters with them and virtually all commercial RF gear uses them. I have a 1.2 Kw amplifier for 6m that uses four MRF151G's which ar3 actually old technology. The amp was originally us3d in a television transmitter where reliability was foremost. No......MOSFET's ARE reliable but you need to use the proper devices and know how they should be run. [/QUOTE]

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