noise blanker nb

  • 3
  • Problem
  • Updated 4 years ago
  • Acknowledged
Noise blanker is still so so performance
Photo of G8ZPX

G8ZPX

  • 197 Posts
  • 110 Reply Likes

Posted 4 years ago

  • 3
Photo of G8ZPX

G8ZPX

  • 197 Posts
  • 110 Reply Likes
Noise blanker is still so so performance.

Over the weekend I had a very bad problem with a high level of ignition type qrm at s9+ on 80m (normally s5 noise level). I tried to track it down but it was so strong i failed to find it.

The noise blanker on the F6300 (v1.6 SmartSDR) did at best a mediocre job of taking out the noise, I still could not work a station at s9 due the ignition noise. I guess I must have gotten used to its poor performance, but do remember it was clearly better on my old F5k with PowerSDR. This was very disappointing, especially so considering that over a year ago FRS said th'd be releasing "a world class noise mitigation with v1.5".

Due to being unable to operate 80m during the weekend, I thought I'd try some other options and tests. I recently acquired a 32 year old Yaesu FT101zd mk3 from an SK. I powered it up and tuned 80m using same antenna etc. 

I then hit the NB button and seriously could not believe the ignition noise had completely vanished (s metre dropped by 3 s points), not a little bit lower but just gone! I was so surprised that I'd assumed the QRM source had stopped, but then turned NB off again and there it was very loud and clear as before.

Over the weekend with lots of playing around, I came to realize that the not-so-magic NB button can be much better on the Flex 6k. If it works so well with 32 year old analogue kit, surely there is much more improvement to come hopefully? 

Sorry FRS need to try harder on the NB, especially given the QRM rich environment we now find ourselves in.

73 de Steve G1XOW
Photo of Walt - KZ1F

Walt - KZ1F

  • 3040 Posts
  • 645 Reply Likes
I don't mean to be piling on but NB has never worked for me and wbn had only worked on two occasions. But when it worked it worked well.