[Elecraft] K3 APF (audio peaking filter) progress report #2

[Steve Ellington]

The Smiths:
 Routing the sidetone through a filter resonant at the sidetone's pitch always cleans up the waveform and improves articulation. The filter must not be so narrow as to cause ringing however. The K3's sidetone is quiet clean but external audio filtering indeed improves the quality of the note which helps, at least this cw op, send faster with fewer errors. I suppose it could be considered psychoacoustic but it works.
N4LQ
Steve

  ----- Original Message ----- 
  From: The Smiths 
  To: n4lq at carolina.rr.com 
  Sent: Wednesday, October 27, 2010 4:22 PM
  Subject: RE: [Elecraft] K3 APF (audio peaking filter) progress report #2


  Steve,
   
  Maybe I'm missing something here, or you are...but the APF has NOTHING to do with sending... It has NOTHING to do with SPOTTING someone, it has NOTHING to do with TONE even, it has to do with Peaking a signal within your current IF passband area regardless of where the IF SHIFT is set, regardless of where your PITCH or TONE is set.. None of these have anything to do with an Audio Peaking FILTER... The on/off button is going to be the Dual PB button.. since that has to do with Filters.
   
  > From: n4lq at carolina.rr.com
  > To: n6kr at elecraft.com; olinger at bellsouth.net
  > Date: Wed, 27 Oct 2010 16:17:10 -0400
  > CC: elecraft at mailman.qth.net
  > Subject: Re: [Elecraft] K3 APF (audio peaking filter) progress report #2
  > 
  > I'm wondering if the sidetone could be routed through the APF? Using a 
  > simple audio filter makes the sidetone sound sharper and cleaner and somehow 
  > improves my sending ability.
  > N4LQ
  > Steve
  > 
  > ----- Original Message ----- 
  > From: "Wayne Burdick" <n6kr at elecraft.com>
  > To: "Guy Olinger K2AV" <olinger at bellsouth.net>
  > Cc: "Elecraft Reflector" <elecraft at mailman.qth.net>
  > Sent: Wednesday, October 27, 2010 3:47 PM
  > Subject: Re: [Elecraft] K3 APF (audio peaking filter) progress report #2
  > 
  > 
  > > Working on that....
  > >
  > > Wayne
  > >
  > >
  > > On Oct 27, 2010, at 12:41 PM, Guy Olinger K2AV wrote:
  > >
  > >> Goes without saying that a lot of us would love to have this for SS CW
  > >> and especially CQWWDX CW, even if it's only a field test.
  > >
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