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

[Phil Wheeler]

My filters are 6, 2.8, 2.1.1.0 and 0.4.  1.0 and 
0.4 average to 0.7 so I think I have it covered ;-)

73, Phil w7ox

On 3/2/14, 11:05 PM, Bill Frantz wrote:
> 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
>
> ______________________________________________________________ 
>
> Elecraft mailing list
> Home: 
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: 
> http://www.qsl.net/donate.html
>