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No RF Power - Help

Bart Haynes
Bart Haynes Member ✭✭
edited September 2019 in FLEX-6000 Signature Series

Comments

  • Paul - K6HR
    Paul - K6HR Member ✭✭
    edited August 2019
  • Bart Haynes
    Bart Haynes Member ✭✭
    edited August 2019
  • John - AI4FR
    John - AI4FR Member ✭✭
    edited August 2019
  • Pat N6PAT
    Pat N6PAT Member ✭✭
    edited August 2019
  • Bart Haynes
    Bart Haynes Member ✭✭
    edited August 2019
  • Bart Haynes
    Bart Haynes Member ✭✭
    edited August 2019
  • Neal_K3NC
    Neal_K3NC Member ✭✭
    edited August 2019
  • SteveM
    SteveM Member
    edited August 2019
  • W7NGA
    W7NGA Member ✭✭✭
    edited August 2019
    Bart, when I had a 6500 it exhibited the same symptoms. The Output transistors were blown and needed replacement. Flex did a nice job of repairing and returning the 6500 in less than two weeks. Of course, there is the chance that it is something else but I suspect it is not. -W7NGA
  • John - AI4FR
    John - AI4FR Member ✭✭
    edited August 2019
  • W7NGA
    W7NGA Member ✭✭✭
    edited August 2019
    Just a bad batch of transistors as I recall. Flex seemed well aware of the issue. I was actually in receive mode ... heard a slight click in the speakers and could not transmit later. 
  • John - AI4FR
    John - AI4FR Member ✭✭
    edited August 2019
    Thanks!! I do wonder now about the date of manufacturer for the radios that might be affected by this. I think the Palstar LA-1K amp also suffered from a similar issue with their LDMOS transistors. I've seen several instances, including personal experience, in which one would just go out. It died. In all cases they died with-in a few days of service. Once the bad LDMOS was changed out the amp became unkillable.
  • Bart Haynes
    Bart Haynes Member ✭✭
    edited August 2019
  • John - AI4FR
    John - AI4FR Member ✭✭
    edited August 2019
  • Jon_KF2E
    Jon_KF2E Member ✭✭
    edited August 2019
    Did you try hitting the tune button to see what the output is as Neal suggested? If tune power is set to 10 watts or above and you have zero output when you tune, it's probably a problem with the finals.
  • Bart Haynes
    Bart Haynes Member ✭✭
    edited September 2019
  • John - AI4FR
    John - AI4FR Member ✭✭
    edited September 2019

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