Good point. It would depend upon whether or not you'd want to hear
someone so far from zero beat.
73,
matt
On Wed, 08 Aug 2012 23:38:06 -0400, you wrote:
>My thought on the 5 pole was that it would give you some protection but
>because the skirts were not as steep you could hear someone call
My thought on the 5 pole was that it would give you some protection but because
the skirts were not as steep you could hear someone calling you off frequency
better. They would be down but not out. The 5's have slightly less insertion
loss and are cheaper. On the other hand they need an offset
Those 8-pole filters have steeper skirts. Either the 5- or 8-pole
work quite well.
I use 5-pole for the narrower filters (250, 500), and the 8-pole for
1.8, 2.8, 13 KHz bandwidths.
73,
matt W6NIA
K3 #24
On Wed, 08 Aug 2012 19:12:58 -0600, you wrote:
>Why an 8 pole filter
>
>OR
>
>Why a 5 pole
Phil,
Go to this link on the Elecraft website:
http://www.elecraft.com/K3/Roofing_Filters.htm
And this link:
http://www.elecraft.com/K3/K3_filter_plots.htm
Dave, N4QS
- Original Message -
From: "Phil Townsend"
Cc:
Sent: Wednesday, August 08, 2012 8:12 PM
Subject: [Elecraft] K3 Fi
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