[Elecraft] KNB3 and my noise blanker issue

[Guy Olinger K2AV]

Per the manual at page 25 (K3, p 27 for K3S),

"The NB icon will flash slowly if the I.F. blanker setting is too high for
the present signal conditions. If this happens, use a lower setting."
 There's more to be read on the subject at that page in the manual.

Found the page by searching the Elecraft users manual PDF for "flash".
Using the search function in the free Adobe PDF Reader on manual or
schematic PDF's has saved me a ton of frustration and time. It is my number
one tool for taking care of RTFM before diving in.

>From my own experience, the setting of the ATT/PRE and RF gain will
decidedly affect how well the IF NB is working.

This is decidedly NOT an issue specific to K3 or Elecraft, as it was a
consideration with analog tube type radios designed designed in the 20th
century. It was/is just about knowing where the blanking threshold is at
your setting and setting preselect, preamp, RF Gain, attenuators, whatever
so that the blanking threshold is NOT cutting into regular signal levels
but is catching the noise peaks. Aside from NB flashing, I could create the
same symptoms you are describing with my long-ago tube radios

73, Guy K2AV

On Sun, May 15, 2016 at 4:14 PM, Mike Smith VE9AA <ve9aa at nbnet.nb.ca> wrote:

> Going through all the menus today (after upgrading to the latest firmware)
> I
> do not see the KNB3 option in my menu system?!
>
> Is that (maybe) why my IF noise blanker is not working? The board is
> either:
>
> Gone
>
> unhooked
>
> damaged
>
> Ideas?/Comments?
>
> Tnx
>
> Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
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