[Elecraft] 200 Hz 5-pole filter

[Bill Breeden]

Wes,

Rob Sherwood's presentation at the following link answers the "why" 
question a lot better than I can:

http://www.sherweng.com/RochesterMN2009/NC0B-W0DXCC-4dRochester_MN.pdf

At the following link, Eric explains why selecting a narrow filter for 
CW operation in a K3 offers superior performance over selecting a wide 
(sideband) filter and adjusting the DSP to a narrow bandwidth:

http://www.elecraft.com/K3/Roofing_Filters.htm

The point I am trying to make is that a K3 with a 2.7 KHz filter and the 
DSP cranked down to 400 Hz will not perform as well for CW during 
crowded band conditions as a K3 with a 400 Hz filter.

73,

Bill - NA5DX



*Wes (N7WS)*wes at 
triconet.org<mailto:elecraft%40mailman.qth.net?Subject=Re%3A%20%5BElecraft%5D%20200%20Hz%205-pole%20filter&In-Reply-To=%3C55B571C4.1010009%40triconet.org%3E>
/Sun Jul 26 19:48:20 EDT 2015/

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Why?

On 7/26/2015 2:02 PM, Bill Breeden wrote:
>//>/Since Sherwood's Dynamic Range Narrow Spaced measurement is of great 
interest />/to CW operators, it only makes sense to make the measurement using a CW />/filter, optional or not. The measurement would be meaningless to CW 
operators />/if made using the stock sideband filter. />//>/73, />//>/Bill - NA5DX />