Yaesu FT 817 repair - Part 1: diagnosis
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Published 2024-03-12
It's back now for a similar symptom, but I think the issue is different this time.
In this Part 1 video, I poke about and develop an hypothesis of the fault that explains the symptoms.
In Part 2: I buy a hot air solder station to do the repair, source parts and have a go! Then we'll see if Part 1 has the right idea of the cause of the fault! In Part 2 also, I share how I measure RF power with a home brew very low power RF meter from Wes Hayward W7ZOI and how I use it in practical situations. Stay tuned and don't forget to like and subscribe...!
All Comments (7)
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the same FET shorted during battery charging on my early vintage 817, W4GSM
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A repair video that ends in a cliffhanger, subscribed!
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Outstanding video! Great explanation of your troubleshooting.
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For me with basic understanding of electronics but knowledge of resistance paths I totally understand your way of thinking. Only de soldering can give you the right measurements but that’s not desirable with those small parts. The FET seems to be the suspect.
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Great investigation!
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SIR! WHERE IS THE PART2 OF ERADICATING A FAULTY FINAL TX STAGE OR [PA BOARD] COULD YOU GIVE THE PART 2 OF THIS REPAIR! I AM CURIOUS!
