[Elecraft] 2.8 kHz filter tilt

[Wes Stewart]

I think you should save your money. Apparently, they appear to have a lot, if not all, filters that behave this way.  Short of having a more symmetrical filter in place the two sidebands aren't ever going to sound the same.  I know that theory says we shouldn't be able to hear a difference, but it's quite audible and quite annoying to me.

Here's a plot of mine: http://k6mhe.com/n7ws/Elecraft_2_8_Filter.gif

Wes  N7WS



--- On Sun, 12/12/10, ab2tc <ab2tc at arrl.net> wrote:

> From: ab2tc <ab2tc at arrl.net>
> Subject: [Elecraft] 2.8 kHz filter tilt
> To: elecraft at mailman.qth.net
> Date: Sunday, December 12, 2010, 3:18 PM
> 
> Hi again,
> 
> A little while ago I wrote the message below. I am still
> searching for ways
> to compensate for the tilt in my new 2.8kHz crystal filter.
> One way would be
> to have a way to set the RX equalizer through a serial
> command / macro. Is
> this going to happen soon? Another way would be to have the
> RX equalizer
> settings stored by mode so they could be different for USB
> and LSB. Is this
> going to happen soon? Am I really asking too much here? I
> spent money
> getting the 8 pole 2.8kHz filter hoping it would solve the
> tonality
> difference between USB and LSB, but achieved nothing.
> Recently there was
> somebody on here wishing that Elecraft would sort these
> filters weeding out
> the ones with a bad tilt. Should I order another one hoping
> to get one with
> a flatter response?
> 
> AB2TC - Knut
>