[TowerTalk] NR-1 noise reduction unit.

[JP]

Yes, it works great under those conditions. Unlike the internal noise blanker in a transceiver, there’s no distortion or noise or other artifacts introduced on a crowded band. 

We used it during CQWW SSB at KP4AA any time we were running USA or listening for JA/HL over the states. 

That’s the real trick, it works great when presented with a source of pulse noise, like line noise, and doesn’t degrade the signals at all. 

J.P. W2XX

> On Nov 13, 2025, at 12:26 PM, Richard Karlquist <richard at karlquist.com> wrote:
> 
> So IMHO, the unit should be called a "noise blanker".
> 
> My ancient FT-1000 had a noise blanker that worked very well ... unless
> there were other radio signals on nearly frequencies.  Think:  contests.
> In that case, it predictably folded like a lawn chair.  Has anyone
> tried one of these during a contest?  I would be very surprised if it
> would work under those conditions.
> 
> ---
> Rick Karlquist
> N6RK
> 
>> On 2025-11-12 05:17, Rob Atkinson wrote:
>> 
>> It's an interesting box; wish the manual included a schematic drawing.
>> They make sure that you realize it's only good for impulse noise, so
>> if that's all you ever have to deal with then okay fine.  In my
>> environment, I've had to deal with leaky cable noise (sounds like
>> white noise), and continually shifting plasma TV noise among other
>> nuisances, so the old phase shifting and nulling networks using a
>> noise pickup antenna are necessary here.  But if all I ever dealt with
>> were AC line noise and motor ignition noise for example, this might be
>> pretty good.   It might be useful for mobile operating.
>> 
>> 73
>> 
>> Rob
>> K5UJ
>> 
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