[Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Richard Fjeld]

Just a note to say that I recall the monitor delay is adjustable in the Config menu.

Rich, n0ce

  ----- Original Message ----- 
  From: Wright, Robert 
  To: eric at elecraft.com 
  Cc: elecraft at mailman.qth.net 
  Sent: Thursday, February 21, 2013 11:35 AM
  Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller


  Eric, 

  Interesting and neat.  I should have expected you were already on top of this.  :-)

   I just went back to the K3 and played with it a bit.  Just by listening, the monitor delay seems to be the same whether I have VOX enabled or not.  This is just the normal acceptable delay I have come to expect in the K3's monitor.

  The Smooth Voice Controller had a nominal 85mSec delay (QST article April 1992 pg. 42) and, if I recall correctly, seemed much more noticeable than what I am hearing in the K3.  Eric, can you comment on the amount of delay used for the K3 VOXing? (Saves me setting up for a measurement.)   Does the monitor come before that delay?  Am I hearing, in the monitor, what is being transmitted (relative to the PTT-voice timing and first syllable cut-off)?

  Thanks, Bob N7ZO


  -----Original Message-----
  From: Eric Swartz - WA6HHQ, Elecraft [mailto:eric at elecraft.com] 
  Sent: Thursday, February 21, 2013 8:49 AM
  To: Wright, Robert
  Cc: elecraft at mailman.qth.net
  Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

  This is -exactly- what we do in the DSP for the K3's VOX to eliminate any cutting off of the first syllable. You can talk normally without that 'Ahh' at the beginning of sentences to avoid loss of info ;-)

  73,

  Eric
  elecraft.com

  On 2/21/2013 8:07 AM, Wright, Robert wrote:
  > I used to have a box from A&A Engineering called a Smooth Voice Controller.  It was a VOXer with a short audio delay line (bucket brigade IC) to allow the PTT to get to the radio before your first syllable.  The result was no clipping at the beginning of each phrase.  The only downside was that monitoring yourself with headphones was tricky with the delay.  But the VOX results were very good.
  >
  > I've always thought that this concept would be a great improvement to the K3's VOX and could be done readily in the DSP.  It could be a menu setting with the voice delay variable from 0 (normal operation) to some fixed amount.  It would only need to be enabled when VOX was on.
  >
  > 73, Bob N7ZO
  >
  >
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