[Elecraft] K2 CW Filter Characteristics

Tue Jul 1 16:20:01 2003

All the width settings do is translate to a voltage that in turn sets what really is a continuously variable width. 

The width numbers convert to the voltage according to a formula. It's not like it's switching in different caps or filters. Continuously variable.

Regardless of how accurate the width numbers are, you can use Spectrogram to set it to exactly what you want, and use whatever number came up. 

I appreciate the system because along with BFO adjustment, it takes individual crystal, or crystalset numbers out of play, giving me the result I want. And I can tweak it if I want it just a little broader or narrower.

On mine to get 400 Hz @ 6db on spectrogram, it takes ~ 350 on the numbers. 

73, Guy
K2AV

> 
> From: [email protected]
> Date: 2003/07/01 Tue PM 01:09:28 EDT
> To: [email protected],  [email protected]
> Subject: Re: [Elecraft] K2 CW Filter Characteristics
> 
> Bill, W4ZV wrote:
> 
> "I've seen varying reports of what the K2's actual bandwidths are"
> ==========
> The filter BWs can be set up to whatever the user wishes from 50 Hz to
> very wide.  16 filters BWs are stored for instant recall (4 for CWnorm, 4
> for CWrev, 4 for USB and 4 for LSB).
> 
> My programmed CW BWs are 1000, 700, 400 and 100 Hz.  Even at 100 Hz, the
> attenuation does not seem extreme.
> 
> As for the shape factor of the filters, others on this reflector are
> better equipped to answer that.
> 
> 73, de Earl, K6SE
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