[ARC5] Way OT -- SX-28

[Hubert Miller]

"...Unfortunately, the blanker in the SX-28 was applied to a point where the bandwidth was somewhat limited so it didn't chop the noise as sharply as it should have. I think also a lot of users did not understand what it was supposed to do so, at some point Hallicrafters issued a modification to eliminate it and replace it with a conventional series limiter. It was some years before another attempt to use the blanker was made. I am not sure but think Collins may have been the next with a blanker for the KWM-2 and 75A-4. " 
I think little interesting tidbits like this should have shown up in that 'Communications Receivers of Past' compendium. But you can't expect the author
to know every little less known facet of their history. 

So Hallicrafters issued modification instructions for the SX-28 ? Interesting ! 

I recall now I have or had a Collins manual for a 'noise blanker'. I don't recall what receiver it was for, but I remember it used a 40 kHz IF channel
( I think ), for the noise amplifier.
-Hue Miller