[Elecraft] Horrible APRS QRM on 2 Meters

[Jim Brown]

On 7/27/2018 6:59 PM, Richard Beerman wrote:
> To me, with the presence of a number of strong APRS signals on 144.390 makes this K-3 extremely unusable on 2 Meters. I was running the K-3 noise blanker to handle the rest of the noise here but likewise, I also had noise blankers running on the two Kenwood radios as well.

I agree with Wayne that a noise blanker is responsible for what you are 
seeing. FWIW, what these two blankers are CALLED in their setup menu 
(long push of NB) is VERY confusing. Fact is, that they are BOTH working 
in an IF, one in the first IF and the other in the second. FAR better to 
call them IF1 and IF2. NOW it becomes clear which is post-xtal filter.

How we talk about something makes it either easier or more difficult to 
understand. That's why I strongly object to use of the word "balun," 
which is used to describe almost a dozen VERY different THINGS, and 
multiple meanings of the word "ground," all of them very different from 
each other. Another is the phrase "ground loop." All three uses often 
cause people to do really dumb things to solve a problem because the 
words don't describe what is really going on!

73, Jim K9YC