it took me a long time to figure out how to use it by ear. believe me, the powerline buzz is everywhere around me and I can still cancel more than 90% of it. It took me like 4 months to get to the point of being able to use the device reliably. Now it takes me less than a minute to find and null out the noise here. :)

DE n7zzt Eric

On Oct 15, 2015, at 7:48 PM, Butch Bussen wrote:

> Keep in mind this only works if noise is from one source, at least that 
> was my experience when I lived in Las Vegas.  I had terrible power line 
> noise, but it came from all over, so the thing didn't work for me at 
> all.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
> 
> 
> On Thu, 15 Oct 2015, Eric Oyen wrote:
> 
>> its fairly effective against single phased sources (like powerline buzz =
>> and other stationary noise sources). It is the unamplified version and =
>> does introduce a little signal loss. However, for what it is, it works =
>> good enough that I can do weak signal work on 80m.
>> 
>> Now,as for what it is:
>> the mfj antenna noise cancellation device is basically a diversity =
>> antenna matrix. It takes signals from both the primary antenna and a =
>> secondary (noise) antenna. It then mixes (or phases) those inputs such =
>> that (when properly adjusted) the noise disappears while leaving the =
>> signals you want intact. This technology predates DSP technology and is =
>> still very useful. In fact, in combination with DSP technology, noise =
>> can almost entirely be eliminated.
>> 
>> DE n7zzt Eric
>> 
>> On Oct 15, 2015, at 2:01 PM, Mike Keithley wrote:
>> 
>>> How effective is the MFJ-1025 noise canceler? What is it?
>>> =20
>>> Thanks.
>> 
>>