-----Original Message-----
From: Eduardo Araujo [mailto:er_araujo@yahoo.com]
Sent: Wednesday, November 25, 2009 4:12 AM
To: Tod - ID
Subject: Re: Topband: Noise
Hi Tod, I tested that one, It will work only if you have "that" type of
noise.
It is a kind of noise blanker for noise generated in main AC because of
swithching applliences.
It didn't work for me because my huge noise is NOT of hat kind.
I simulated that kind of noise intentionally and it worked perfectly well
with more than 40db attenuation.
It is neither dificult nor expensive to buil ... I would examine noise with
an scope in the loudspeaker to see if you have the right kind of noise.
Even though I knew it in advance it was NOT, I gave it a try....who
knows....Regards......... Eddy.- LU2DKT
--- On Tue, 11/24/09, Tod - ID <tod@k0to.us> wrote:
> From: Tod - ID <tod@k0to.us>
> Subject: Topband: Noise
> To: topband@contesting.com
> Date: Tuesday, November 24, 2009, 2:48 PM For some folks on 160 noise
> reduction is of interest.
>
> I have placed a copy of a paper written for the LowDown [A LowFer
> magazine which I believe is no longer being published] some years ago,
> It used to be in the LowFer library but seems to no longer be
> available online.
>
> The paper was written by John Reed and has the title "Synchronous
> Noise Blankers Revisited". I have placed a .pdf copy of it on my web
> site at
>
> http://www.k0to.us/HAM/Articles/Synchronous%20Noise%20Blankers%20Revis
> ted.pd
> f
>
> If anyone has built and tested this circuit I would appreciate hearing
> from them. I am planning to fabricate one for myself and test it to
> see if the claim of 60 to 80 dB of noise reduction is real.
>
> Tod, K0TO
>
>
> _______________________________________________
> 160 meters is a serious band, it should be treated with respect. -
> TF4M
>
_______________________________________________
160 meters is a serious band, it should be treated with respect. - TF4M
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