[Elecraft] Inrad 1500Hz filter for the K3

[Guy Olinger K2AV]

You don't have to buy one to try it out. You can adjust the
SHIFT/WIDTH controls to see what it sounds like.  Having a narrow
roofing filter pays off in a contest or other heavy operating
conditions to keep something loud in the space between the roofing
bandwidth and DSP bandwidth from pumping the hardware AGC.

73, Guy.

On Thu, Jan 28, 2010 at 11:56 PM,  <K4IA at aol.com> wrote:
>
> It is narrow but you slew the passband shift over so the max
> intelligibility matches up with the center of the audio (not necessarily with  the center
> of the filter) and you can copy SSB with a 1.1 khz filter.   Play with it
> you will be amazed.  The intelligible portion of audio is  really quite
> narrow.
>
> Buck
> k4ia
> k3# 101
>
>
>
> In a message dated 1/28/2010 9:33:44 P.M. Eastern Standard Time,
> bob at gotoloveland.com writes:
>
> Well  they are out of stock, so the filter must be pretty good, or at
> least  popular.
>
> I have read nothing but good about this filter, though it  seems to be a
> bit narrow for SSB, or that is what history tells  me.
>
> Any bad on this filter?
>
> I would actually like to put one in  the K3 and also the Mark-V, as they
> share a common IF frequency ( 8125 kHz  ).
>
> Not looking for Hi-FI, just the best blocking that will still give  an
> intelligible SSB  signal.
>
>
>
>
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