[Elecraft] K3 noise B and R

jacrux jacrux at googlemail.com
Sat Feb 23 05:20:34 EST 2008


The N0SS demo is very impressive. The noise sounds like what I have here in 
the city suburbs most (all) of the time. But here hitting  "NB" has no 
tangible effect. I have not found it useful !  (OK;  I probably need to read 
the manual and play with the settings.) 
On the other hand,  "NR" does work well provided the wanted signal is strong 
enough. (Once again, read the manual, I know ...)

On 80m I have now adopted a different approach to the awful local noise 
levels. I found that hitting "ATT" was very effective in reducing unwanted 
noise, especially when listening to weaker signals, including VP6DX over 8000 
miles away and nothing like as loud in here as on the N0SS recordings.  
Today I tried listening to VP6DX on 80 with ATT set to OFF and the noise was 
painful. Hitting PRE made it far worse. NR did not really help, but  with ATT 
ON, I worked them on 80m CW with just 10w .... 
The antenna here is a 20m wire bisquare, bottom corner about 7 feet off the 
ground and firing vertically upwards on 80.
As the VP6 op said when I told him  .... "OUCH"   
But the mojo sure works, because I also made it on 80 with 100w of SSB !  
Again this was with ATT  ON. PRE seems best left for the HF bands, 20m and 
up. But  ATT is a powerful option when all else fails.
John G3JAG  K3 #107 K2 # 609


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