[Elecraft] IF noise blanking trivia

[Jack Smith]

In addition to Motorola, didn't Collins use this approach with the 
KWM-2? I recall the noise receiver as operating around 40 MHz, which is 
a peak frequency for spark plug noise.


Jack K8ZOA


Ken Kopp wrote:
> The initial patent for the concept of a separate "noise receiver"
> detecting noise and blanking the IF system was issued to Motorola 
> for use in their "low band" ... 27 - 54 mHz ... 2-way radios.  They
> called it a "range extender", and this was the label on the control
> heads that turned the feature on and off.
>
> 73! Ken Kopp - K0PP
>       ElecraftCovers at rfwave.net
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