the time because I do not have an 160m Antenna
any longer.
73 de Peter, DL2FI
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Marinos Markomanolakis, M.D.
Sent: Sunday, April 03, 2005 6:45 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] RF
http://www.mfjenterprises.com/products.php?prodid=MFJ-1025
http://www.w8ji.com/mfj-1025_1026.htm
73, Bill W4ZV
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change,
Hi Peter,
Would this type of noise canceler not work on white noise also ?
73,
Marinos, ki4gin
From: Peter Zenker [EMAIL PROTECTED]
To: 'Marinos Markomanolakis, M.D.'
[EMAIL PROTECTED],elecraft@mailman.qth.net
Subject: RE: [Elecraft] RF Noise canceller ?
Date: Sun, 3 Apr 2005 13:03:51 +0200
In a message dated 03/04/05 12:11:33 GMT Daylight Time, [EMAIL PROTECTED]
writes:
There have been several schematics using such technics over the last 20
years. Most of them use a seperate short antenna, feeding the signal pase
shifted into a combiner which combines the main Antenna
, April 03, 2005 3:26 PM
To: [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Subject: RE: [Elecraft] RF Noise canceller ?
Hi Peter,
Would this type of noise canceler not work on white noise also ?
73,
Marinos, ki4gin
From: Peter Zenker [EMAIL PROTECTED]
To: 'Marinos Markomanolakis, M.D
-Original Message-
Would this type of noise canceler not work on white noise also ?
___
The simplest answer is no. White noise typically arrives from random
directions, with random phases, random polarizations, etc. etc. etc. and
are usually from thermal
Would this type of noise canceler not work on white noise also ? 73,
Marinos, ki4gin
That depends a lot on the source of the noise, broadband (white) or
otherwise. These circuits depend upon a second antenna picking up the noise
better than the signal. Then the signal from the noise antenna
-Original Message-
Would this type of noise canceler not work on white noise also ?
__
White noise typically arrives from random directions, with random phases,
random polarizations, etc. etc. etc. and are usually from thermal and
uncorrelated sources.
---
Interesting thought Marinos. There are receivers (non amateur) in which any
DSP,s ( if there is one) main job is to provide a large number of audio
filter bandwidths and some additional hetrodyne removal. The removal of QRN
noise and QRM within the IF filters passband is done in the early stages
Just a question for the technically inclined group members:
How feasible or worth the effort, would be the addition of an option to the
K2 which would sample RF noise from a ferquency close to the used
band,(tunable?) which is devoid of signals, phase invert and reinject the
noise to an IF
10 matches
Mail list logo
