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6600M only works properly by loading one profile

Paul Staupe
Paul Staupe Member
edited October 2018 in FLEX-6000 Signature Series
Flex 6600M running 2.2.8.109. Worked perfectly until a couple of weeks ago.

Suddenly, I would switch from band to band using existing profiles or from N1MM+ and radio would be deaf with an apparent very high noise level as well as transmit signal would show many spurs. Everything looked normal as far as proper antenna selection etc.  At first I thought it was a hardware problem until I tried using the one profile that worked,  AM BCB in diversity mode.  I could hear all the local AM BCB stations normally and when I would use that profile and switch to 20CW for instance, everything would appear normal. 

However, I can't save the settings.  Switching bands from an operable band brings up the same problem.

I'm concerned that if I do a factory reset, I won't have even one profile that works.  Any ideas?

Comments

  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited June 2018
    simply save your profiles to file, then they are never lost. You can do a factory reset then upload your profiles back in again. I sounds like a persistance problem. by doing a factory reset it clears all profiles.
  • Wayne
    Wayne Member ✭✭
    edited June 2018
    You do have the new heatsinks installed, correct?
  • John - K3MA
    John - K3MA Member ✭✭
    edited June 2018
    Try switching antenna from ANT1 to RX B and then back.  If the noise disappears then you might have a heat sink that has come detached from the ADC.  I have seen these symptoms on a 6600M and replaceing the heatsinks fixed the issue.
  • Paul Staupe
    Paul Staupe Member
    edited June 2018
    Got a response from my ticket this morning from Tim Ellison saying that I had a corrupted band persistence database:

    You need to clear the band persistence database in the radio using this procedure.  
    https://helpdesk.flexradio.com/hc/en-us/articles/200831185-How-to-Reset-Persistence-Database-for-a-FLEX-6000

    This is a good reminder to ask for help immediately rather than trying to solve an issue by yourself. 

    I ended up inadvertently destroying the LDMOS devices in my amplifier because I thought I could figure it out by myself.and was in a hurry,  ... Hopefully,  I've learned my very expensive lesson.


  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited June 2018
    Guess you missed my comments..lol
  • Paul Staupe
    Paul Staupe Member
    edited June 2018
    Sadly, Bill I blew up the amp before I asked for help!  A good life lesson!
  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited June 2018
    Oh no,,how did that happen?

  • Wayne
    Wayne Member ✭✭
    edited June 2018
    If you buy another amp be sure to get an elecraft they are so internally protected they are almost indestructable. More expensive but you save money in the long run I found out when I accidentally overdrove my kpa500 3 times in a row before I found the issue. Its still working super.
  • Johan / SE3X
    Johan / SE3X Member ✭✭
    edited October 2018
    Reading this, I'm pretty happy having a tube amp. Don't think I might be able to **** up my Acom A1000, with the 100 Watts from my 6700, what ever crazines I do! The Expert 1K I have sitting under the table remote controlled ... that's another story. I do hope you get it sorted out. Hopeful some of us have learnt something from your sad experience and then it's not totally wasted.
  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited June 2018
    I would be interested in how it happened, and what kind of amp it is.
  • Paul Staupe
    Paul Staupe Member
    edited June 2018
    My amp has overdrive protection as well as a 13dB input attenuator, however I hit the amp with 100w (plus whatever overshoot the Flex develops) twice in rapid succession which more than likely took out the protective clamping diodes and allowed the full power to hit the input of the LDMOS devices.  It was a freak occurrence which wouldn't happen under normal circumstances.
  • Paul Staupe
    Paul Staupe Member
    edited June 2018
    After several conversations with Tim Ellison at Flex he suggested that my high noise, low sensitivity across all bands symptoms sounded like the heat sink issue that Flex discovered and sent out the PEM kits to resolve.

    When I opened the radio last night I was surprised to see that one of my heat sinks had completely fallen off of its ADC, and the second was barely attached to the second ADC.   When I removed the faulty heat sinks and attached the new ones, the problem completely disappeared! 

    Even though I only had the radio on for a few hours at a time, the heat was enough to cause my heat sinks to slip.  Problem solved!
  • Wayne
    Wayne Member ✭✭
    edited June 2018
    I thought the heatsink issues were all resolved for units shipped after april 13th at least that was what was posted in the community ....
  • Paul Staupe
    Paul Staupe Member
    edited June 2018
    Wayne,  my 6600M was one of the first batch shipped.  I ordered it the day after Dayton 2017.
  • Wayne
    Wayne Member ✭✭
    edited June 2018
    ok understand, i mentioned the heat sinks 3 days ago on this post, but you must have over looked it. Glad your back in operation.

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