My horrible utility line noise (which afflicted me in ARRL 160) continues and I'm looking to operate in the CQ 160 test this weekend and not be an alligator. I've located the offending pole but lack
Tim, I am *very* interested it this! Please, if you get any private messages, post them here so we can benefit from this. Many hams have testified that Linrad is absolutely the best SDR software avai
I just remembered that there is a Linrad user group. I think that there is a link to it on Leif's Linrad website. 73, Mike W0BTU _________________ Searchable Archives: http://www.contesting.com/_topb
But in a 160 contest with a huge density of loud local signals, the rigs noise blanker's action just mixes all the super-loud dense signals together and isn't really effective anymore. Tim N3QE tshop
On 1/20/2020 2:28 PM, Richard (Rick) Karlquist wrote: In most cases, line noise is a repeating function with a frequency of 50 or 60 Hz. To make an effective noise blanker in a contest, you simply
The Kalman filter still generates a blanking pulse like the conventional circuit. Feedback loops adjust the width and timing of the blanking pulse. "Amplitude" is not applicable. The frequency of the
Rick, there are irregularities in my noise - and in the previous utility line noises I've had at my QTH - that prevent any predict-the-exact-time-of-the-noise-spike-in-advance algorithms. Although my
OK forgot the Kalman filter. Back to brainstorming Plan B: In the 1950's I believe Collins Radio had a scheme with the KWM-2 mobile radio where they had a VHF receiver at 35 MHz IIRC that picked up
The MFJ Noise canceler seems to work ok. As a quick band aid for the contest. I have an AN4 and have never been very impressed with it. W0MU Although my sample size is small the experts have told m
This may be of help. New product for MFJ? 73, Roger In a quiet non-contest topband session, my rig's noise blanker does a very decent job eliminating the 120Hz impulses. I have to operate many kc awa
Darn! Forgot the URL! http://www.ka7oei.com/syn_blank.html 73, Roger In a quiet non-contest topband session, my rig's noise blanker does a very decent job eliminating the 120Hz impulses. I have to op
73, Roger This is the "Kalman filter" I posted about earlier in this thread, although Kalman is my term, and wasn't used by previous writers. Let's say they independently reinvented the Kalman filter
This is a very interesting thread! I thought I would share my own failed attempt at noise blanking from the early 1980s, when I spent my time on the low end of 2 meters. That way, nobody wastes their
AS AN UPDATE, N2NC and I are in communications regarding his Linrad noise blanker settings and I am making some progress in learning how to effectively adjust and operate the advanced noise blanker c