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Internal noise on 160 meters - Flex 6600M

Joe N3HEE
Joe N3HEE Member ✭✭
edited February 2019 in FLEX-6000 Signature Series
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Answers

  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
    This is what it looks like in WIDE mode.
  • K1UO Larry
    K1UO Larry Member ✭✭✭
    edited February 2019
  • NA0B
    NA0B Member ✭✭
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
    It's not my monitors.  I don't have this noise on my K3.  Pretty sure it's internal to the Flex.  I opened a ticket with Flex.  
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited October 2018
    Thanks Larry.  Your noise spurs are different than mine but still not good.  Did you have spurs with 2.3.9 firmware ?
  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited October 2018
    Because the K3 can not pick up the noise does not mean the Flex can't.
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
    I made a little sniffer loop antenna and connected it to the K3.  I can hear the noise on the K3 when I get the sniffer antenna close to the rear of the Flex.  It's S5 on the K3 when sniffing the rear panel of Flex.  Flex engineers are looking into this issue now.  
  • K3SF .
    K3SF . Member ✭✭
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
    Thanks Paul.  What version firmware are you running ?
  • W8WD
    W8WD Member
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
    I have one around 1827 but not as loud as the one at 1837.  What version of firmware are you running ?
  • K1UO Larry
    K1UO Larry Member ✭✭✭
    edited October 2018
    Hi Joe,       I have had these through at least the last 3 firmware updates.   I should mention that the 6400 did have the large single spur on it like your picture shows.  My picture was taken in a much narrower bandwidth on the Panadapter and only start to show after s/n base  drops below -120dbm on the pan...  which happens a lot with my RX array or Beverages.
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited October 2018
    Yes, I noticed mine when I started using my RX antenna a week ago.  Flex engineering is looking into the issue.  
  • W8WD
    W8WD Member
    edited October 2018
  • NA0B
    NA0B Member ✭✭
    edited October 2018
  • W8WD
    W8WD Member
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
  • Barry Simpson
    Barry Simpson Member
    edited November 2018
    I have a loud internal spur on or about 1.828. I say about because the frequency is power supply voltage dependent. At first I thought that it was just a problem with the power supply but I have tried three different supplies with the same results. It is exactly the same strength into a dummy load or with an antenna connected and is definitely internally generated I would suggest somewhere near the front end. I have done some playing around and I have found that after a few changes to the Receive antenna source I can make the spur go away at least for a while. I normally use antenna 1 input for transmit and receive. If I then tap on receive antenna 1, then receive antenna 2, then antenna 2 and finally back to antenna 1, the spur disappears on the final move back to antenna 1. It may not be that exact sequence but it always seems to work but then the spur comes back sooner or later. Hopefully my non-scientific findings may give the Flex team a clue as to what is happening. Barry Simpson VK2BJ
  • Robert Lonn
    Robert Lonn Member ✭✭
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
  • K3SF .
    K3SF . Member ✭✭
    edited October 2018
  • K1UO Larry
    K1UO Larry Member ✭✭✭
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
  • Ed Stallman
    Ed Stallman Member ✭✭
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
  • Ed Stallman
    Ed Stallman Member ✭✭
    edited October 2018
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited February 2019
  • K1UO Larry
    K1UO Larry Member ✭✭✭
    edited February 2019
  • Tom Worthington
    Tom Worthington Member ✭✭
    edited February 2019
  • Joe N3HEE
    Joe N3HEE Member ✭✭
    edited October 2018
    Thanks Larry. I will also open a new ticket for this issue.  I already gave Tim a heads up this was coming.  

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