Interesting NB behavior

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  • Updated 3 years ago
I know this is going to sound crazy, but on the 15 meters this weekend I has a S5 noise level that sounded like line noise.  I have tried the NB a few times before with no apparent reduction of the noise level.  This time the noise dropped significantly by 2-S units. What?  I though the NB had not been worked on yet.  I turned off NB to try it again and .... no effect.  Turned NB off and turned it on again.  No Joy.  Turned it on again and there was the 2-S unit reduction again.

After MUCH experimentation I can only conclude that the NB is somehow sensitive to when, in time, it is engaged.  It may be a matter of microseconds or milliseconds, but it seems that it works or doesn't work randomly as a function of when the NB is pressed relative to the noise pulse it is trying to attenuate. Can anyone out there duplicate this NB behavior or was this peculiar to my radio.  (BTW, NB level was 50% and it worked immediately when it worked and when it did not it didn't matter how much time I left the NB on.)
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Charles - K5UA

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Posted 3 years ago

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Burch Akin

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Yes, this is normal NB behavior for me.  I have a lot of power line noise in my area.  I usually have to turn the NB on and off and back on several times before it will work, although sometimes it does work the first time.  When it does work, it only works for a short amount of time and slowly the noise comes back if I tune around or there is a strong signal I tune to.  I am really looking forward to 1.5 as this will really complete the radio for me.  I am envious of people who don't have to live with power line noise.  My 5000a has a great NB and I still use that radio when my power line noise gets bad.
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Tim - W4TME, Customer Experience Manager

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Charles - there are some very interesting "behaviors" associated with the current NB implementation.  We are in the middle of a complete rewrite of the NB code.  The initial versions are showing some significant promise.  We have not started alpha testing it yet, but I suspect we will shortly for an upcoming release.  Stay tuned.  I think everyone will be impressed by the enhancements made to the NB.
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Charles - K5UA

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Thanks Tim.  Glad to know I wasn't hallicunating!!  

2 S-units was pretty good, although not consistent.  Looking forward to the "real deal" the Flex rocket scientists are working on.  Nothing can ruin a day at the rig like line noise ( or other ignition type noises).
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Burch Akin

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Tim, I can't wait to see the new NB.  That will make the 6000 series near perfect for me.  I built my house back in 1996 and there were cow pastures on 3 sides of me.  Now, I have thousands of houses around me and power poles everywhere.  Not so quite anymore.  Some days a have very low noise and other days it sounds like a buzzsaw!