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Re: [linrad] noise blanking comparisons
- Subject: Re: [linrad] noise blanking comparisons
- From: W6WO <ron-skelton@xxxxxxxxxxxxxxx
- Date: Fri, 11 Jul 2003 14:31:17 -0700
Greetings all. I am interested in weak signal HF CW and have been
drawn to investigate Linrad because of Lief's reputation and my
desire to try to be just behind the bleeding edge. I haven't got
Linrad running yet so I was especially interested in the WAVE files
W3SZ provided. I listened to them carefully.
I would like to hear any preliminary conclusions about the
performance of the K2, Linrad and SDR -1000 on both CW and SSB
With regard to noise reduction am I right in my understanding that
the noise cancellation/blanking in Linrad and SDR-1000 is focused on
impulse noise and not on reduction of background noise associated
with lowband HF propagation ?
Has anyone in this community investigated de-noising functions
provided by Wavelet techniques ?
This morning I was playing with the SDR-1000 on 20 meters
when the band was wiped out by pulse noise.
I quickly assembled the Linrad receiver [it had been taken
apart to go to W2SZ/1 for the June ARRL VHF Contest] and put
it on the same frequency.
The experiment is far from perfect, but I have some zipped
wave files from both Linrad and the SDR-1000 copying an
American ham who is vacationing in VK land, in QSO with a
This is all apropos ALex Crow's email of a few days ago, and
those who were wondering about how Linrad and its
noiseblanker would do on HF SSB.
The files are of Linrad and then the SDR-1000 using the same
antenna, etc on the same station, with Linrad files recorded
before and after the SDR-1000 files.
Hope this is of interest to someone.
The text on the page explains things in more detail.
http://www.qsl.net/w3sz/linradnoise.html is the URL.