[Elecraft] K3 Filter IMD numbers

[Eric Swartz - WA6HHQ, Elecraft]

Hi Bill,

I've added the 1.8 kHz 8 pole filter plot to the web page. Its 6 dB b/w 
is 1.913 kHz and the shape factor is 1.5

We just measured the following in the lab:

The 200 Hz 5 pole filter -6 dB b/w is 224 Hz  (200 Hz at -3 dB).  Its 
shape factor is 4.0.

The 500 Hz 5 pole filter -6 dB b/w is 565 Hz (465 at -3 dB). Its shape 
factor is 3.1.

The 2700 Hz 5 pole filter -6 dB b/w is 2.91 kHz (2.71 at - 3 dB). Its 
shape factor is 2.9.

As one would expect, the shape factors of the 5 pole ladder filters are 
broader than the 8 pole filters.

73, Eric  WA6HHQ
-----------------


Bill Tippett wrote:
>
>
>         Thanks...I almost I have enough to
> finalize my order.  Please fill in the blanks:
>
> Filter  BW              Shape Factor
> 200
> 250     370             2.1
> 400     435             2.1
> 500
> 1000    1063            1.6
> 1800
> 2700
> 2800    2888            1.6
>
> *All data taken from 8-pole plots...nothing
> available for 5-poles filters or the 1.8 8-pole.
>
>                         73,  Bill  W4ZV
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>