Flex NB really needs improvement

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  • Problem
  • Updated 19 hours ago
  • Acknowledged
I have read posts on the forum before being critical of the Flex NB and NR not working.  Many times the Flex defenders swoop in and post contrary comments that take the posting off track.  Frankly, I could never really agree or disagree as I had no personal experience using the NB until now.

I have used a Flex long enough that I agree the WNB works well on the types of noise it was designed to mitigate.  However, my understanding is the NB should be mitigating pulse type noises.  This morning I awoke to a pulsing noise between 7140 and 7170.  You can see it clearly on the panadapter screenshoot attached.  I checked another receiver 15 miles away and it was also present at this other location so I know it is not confined to my QTH.

I tried to mitigate the pulsing noise using the Flex NB.  Regardless of the setting of the NB or the AGC-T it would not touch the noise.  I knew it would not work but I even tried the WNB with the same disappointing results.

I went over to my backup KX3 and pushed on the NB and it immediately removed the pulsating noise.  Yesterday a Drake TR-4 arrived that I had purchased for a friend.  I had hooked it up last night to test it so I thought now would be a good time to test if it's NB worked.  I was pleasantly surprised when I turned on the TR-4 Noise Blanker and the pulsing noise disappeared with no distorting of the audio from a VK station in QSO.  Understand that the TR-4 is about a 50 year old rig with tube technology.  I even filmed a video with my cell phone of the noise mitigation of the TR-4 Noise Blanker in operations but cannot post it here.

As I went to post this finding several other post from 4 years, 3 years, 2 years and up to 1 year ago turned up with exactly the same statement that the NB (NR) needs improvement.

I wonder why Flex has not been able to match 50 year old NB technology on current day radios worth thousands of dollars?  From the length of time that this problem has been posted one would think there has been enough time to gather and deploy the programming resources to fix the poor operation of the current NB.  Drake was doing it 50 years ago.  Elecraft is doing it on the QRP KX3.

Flex management you should really get serious about fixing the long nagging issue.
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John - K3MA

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Posted 2 years ago

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WW1SS - Steve

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Agree . . . That has been an issue since I purchased my first 6300 when they came out.
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Joe Conover

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Love this new started  Tread/Post ,dont worry about burning a few feathers that how Kool-Aid was invented- remember its just a radio but changes cost money=
I have agree about NB on older Boat Anchors,My Hallicrafers SR--400 II knocks socks off Flex 6400M with plasma tv noise to hear on 80 i HAD SPEND $235 on a MJF 1026 ,400-II no noise with NB on ,its amazing hallicrafter SR-150 and 400-II hears every ssb stations as well or better than Flex 6400M ,PERHAPS A firm ware up date soon on Flex 

Joe    
(Edited)
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John Orjias

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yes i already have the 1026 it works great. i was disappointed that for the most part it does a better job then even the WNB, however i have found there are times when using both the NB and the 1026 take out stuff that neither would do by themselves.
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Joe Conover

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make the 1026 work best u need this 
ebay (Mini-Whip HF,VLF active RX antenna with power feed unit) Made in Russia
$39 


(Edited)
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John Orjias

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well thats cheap enough i will give it a try thanks. at $25 its worth giving it a shot.
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John Orjias

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ordered wow it will not be here until july :-( oh well i have an antenna i'm using with it in the mean time, but this is still a great solution so i can use that antenna i'm using now for other things when this comes in.
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Joe Conover

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its virus hold on shipping 

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