[Elecraft] [K3] Perfect for Field Day S&P ... Limited Production 700 Hz 8-Pole Filters

[Bill Frantz]

I am using:

13 KHz: 0 dB
2.7 KHz: 0 dB
2.1 KHz: 0 dB
250 Hz: 6 dB

When the 2.1 and 250 filters switch in, the signal level in the 
earphones doesn't seem to change, but the noise level does 
indicating an improvement in S/N. Perhaps they are sharpening 
the cutoff of the DSP filter removing some of the off-frequency noise?

Cheers - Bill, AE6JV

On 3/2/14 at 11:51 AM, mzilmer at roadrunner.com (Matt Zilmer) wrote:

>In the K3 Utility -> Configuration tab -> Configure Crystal Filters,
>you will see that each filter has a Gain setting.  You can change the
>gain on a per-filter basis to maintain approximately the same overall
>gain.  Generally the smaller bandwidth filters require a few more dB
>gain than wider ones.
>
>An example:
>13 KHz:  0 dB
>6 KHz: 0 dB
>2.8 KHz: 1 dB
>1.8 KHz: 2 dB
>0.25 KHz: 4 dB
>
>These settings work well in my K3.

>On Sun,  2 Mar 2014 11:37:58 -0800, you wrote:
>
>>I have the 2.1 KHz (for SSB) and the 250Hz (for CW and 
>>digital) filters. ... I notice as I am narrowing the bandwidth 
>>in both CW and SSB, when the K3 switches to a narrower filter, 
>>there is a noticeable step down in the noise level that 
>>doesn't occur when just narrowing the DSP bandwidth one notch.
-----------------------------------------------------------------------
Bill Frantz        | "The only thing we have to   | Periwinkle
(408)356-8506      | fear is fear itself." - FDR  | 16345 
Englewood Ave
www.pwpconsult.com | Inaugural address, 3/4/1933  | Los Gatos, 
CA 95032