I wouldn't build this circuit as presented.
The basic concept seems to have merit (although it
is an obvious idea IMHO) and this paper serves as
a proof of concept to some extent.
A much better RF gate could be built with one of those
bus switches that are used in Tayloe mixers.
The line stuff uses antique CMOS parts and needs to
be updated.
Another thing you could do is to simply co-opt the
existing noise blanker in your radio by driving its
gate with 120 Hz pulses. I had considered doing this
to my much modified FT-1000.
You would think that Elecraft would add this to the K3.
Probably wouldn't take much for them to do it.
Rick N6RK
Tod - ID wrote:
> 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%20Revisted.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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