Inadvertent and unstoppable scanning on my 6700

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  • Problem
  • Updated 3 years ago
  • Solved
This is a solved problem for me, but I thought it should be put into the problem database for future reference.
This morning I cleaned up my radio desk, with my 6700 up and running. In my effort to make things neat and tidy I unplugged my Radio Sport RS 60 Headset from the front panel MIC connector untangled it and then plugged it back in, never looking at my display screen. Several hours later when I finally got ready to operate the WAE contest I sat down and when I looked at the display. The 6700 was scanning down in frequency at a one Hz/step rate (that was my selected tuning step). Nothing I could do would stop the scanning. I could change the frequency up or down, increase the step size up or down but not stop the scan.
I tried everything I could think of, shutdown and re-boot, total power down, downgrade to a old SSDR version, reload a new download from Flex nothing worked it would just start scanning again every time I started the program again.
I was about to give up when I decided to pull the radio out of the desk shelf it was in. So I unplugged the MIC cable again and started to slide the radio forward to get at the rear cables and I just happened to notice that the scanning had STOPPED. At that point I remembered that about two years ago I had the very same problem that somehow fixed it self. There was also some discussions on this forum about similar problems.
I think that "hot plugging"the MIC somehow triggers the MIC frequency down button circuit and locks it in even through power down cycles. (Could also be a hard short to ground or voltage, just guessing here.) Anyway I'm back up again so I don't care what the problem was I just want to remember it for the next time. Old age is hell on the remember section of the Version 76 brain.
Long story short, turn off the power if you don't have a MIC with the frequency up/down function.
73, Al N4AB
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Posted 3 years ago

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Photo of Tim - W4TME

Tim - W4TME, Customer Experience Manager

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Official Response
Chris (K6OZY) is correct.  Some mice cable connectors are a little small in diameter and or the "key" slot is not molded properly allowing for the connector to be inserted incorrectly.  The Heil connectors are infamous for this. When it happens, the DOWN pin becomes grounded and the radio starting tuning.

BTW, I hot plug mics all the time and never see this behavior.