[Elecraft] K3 Noise Blanker

[rlvz at aol.com]

I really enjoy my K3s.  That said, I agree with K9MA's post that "I have never found the K3 noise blanker to be effective".  Though I would probably modify the word "never" to " very seldom".  


I realize that a great deal of work has gone into making the K3 NB all it can be but it needs improvement. I've found the NB on other radios to work a a great deal better reducing both impulse and even the "Electronic generated noise" mentioned by K9YC.  There has to be a way to improve the K3 NB and I sincerely hope that more work will be done on this needed improvement.


73,
Dick- K9OM 








On 9/3/2017 9:18 AM, K9MA wrote:
> I have never found the K3 noise blanker to be effective.
<SNIP>

> BTW, the K3 noise blanker uses a filter with a bandwidth of about 100 kHz.
<SNIP>

The K3 NB is really TWO blankers, operating in two different IFs. Each 
can be tweaked for various kinds of noise from the menu system.? Access 
the menu by a Long Push of the NB button.

It's important to understand that there are many kinds of noise. Noise 
blankers are most effective on IMPULSE NOISE, which is the result of 
something arcing, usually in the power system, but also electric fences 
and neon signs.

Most of the residential noise we hear today is ELECTRONIC noise, 
generated by switch-mode power supplies and microprocessors.? Noise 
blankers must be very different to suppress this sort of noise. The menu 
tweaks provided by the K3, K3S, KX3, and KX2 are very critical to making 
the NB effective on the noise you're experiencing. One size does NOT fit 
all.

73, Jim K9YC