[Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

Wes (N7WS) wes at triconet.org
Thu Feb 4 13:43:27 EST 2016


The Collins noise receiver operated around 40 Megacycles, as we said in those days.

My late friend and "Elmer", Lee, W7UVR was one of the first kids on the block to 
have a 136C-1 blanker to use with his 75A-4.

Since he was quite well off financially I never understood why he lived in the 
same neighborhood my parents and I lived in, particularly since he had a power 
line practically in his back yard, but he did.  Because of this, he couldn't 
hear anything, so he became an Official Bulletin Station for ARRL and he built 
the mobile rig to end all mobile rigs. (In AM days, a 4-1000A high level 
modulated by four 813s.)  See: http://www.k0bg.com/gallery2/main.php?g2_itemId=1039

But the Collins noise blanker made all the difference.

On 2/4/2016 8:48 AM, Bob McGraw K4TAX wrote:
> [snip]
>
> There's a lot of history with Collins Radio and the implementation of noise 
> blanking methods.  None of these use DSP schemes and in one system, a separate 
> antenna was used to feed noise pulses to the blanker circuit. 



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