[GreenKeys] suggestion for ST6 Modification.

Tue Mar 4 09:50:25 EST 2014

Gentlemen,

I find some of the comments in this thread to be confusing.   Since, by design, there is an adjustable delay of  25 to 40 seconds after the "loss of signal" until the motor shuts down I would think that this "long time" of open running of the machine would have driven operators absolutely crazy in 1973.   So I have to wonder whether or not the critical (and admittedly lengthy) Auto-Start tune up procedure has been followed by people with this problem.

The overall tuneup procedure for the ST-6 is extensive and if you do not have access to it I fail to see how the TU can be operated!  There is more to this than just a "relay."

73

Lee   K9WRU

  ----- Original Message ----- 
  From: W2HX 
  To: greenkeys at mailman.qth.net 
  Sent: Monday, March 03, 2014 5:50 PM
  Subject: Re: [GreenKeys] suggestion for ST6 Modification.

  My mistake. You are all correct. Loop does open when the motor stops. But as several have suggested, it would be nice to hold the loop for a few seconds while the motor spins down.

  Thanks everyone and sorry about the error

  Eugene

  From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Jack Hart
  Sent: Monday, March 03, 2014 5:49 PM
  To: greenkeys at mailman.qth.net
  Subject: Re: [GreenKeys] suggestion for ST6 Modification.

  In the ST-6, the autostart motor relay also opens the loop.

  I've seen a lot of ST-6's with that feature "jumpered out"....

  Jack K0TTY

  From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Herb Graeber
  Sent: Monday, March 3, 2014 4:32 PM
  To: greenkeys at mailman.qth.net
  Subject: Re: [GreenKeys] suggestion for ST6 Modification.

  If I remember correctly, both the motor and the loop

  current are cutoff at the same time.  I remember the

  machine running open for the few seconds while the

  Model 28 ran down.  But, I've slept since then.

  73...Herb K5HG

    ----- Original Message ----- 

    From: Alf Fisher 

    To: k0bx at arrl.net ; W2HX ; greenkeys at mailman.qth.net 

    Sent: Monday, March 03, 2014 4:04 PM

    Subject: Re: [GreenKeys] suggestion for ST6 Modification.

    Hi Joe & Eugene,

    I reckon it would be desirable after the auto-start relay times out, to have a few seconds delay before opening the loop otherwise the machine will run open while the motor slows down.

    The ST-6 does cut off the loop current and motor already but I don't know whether there is any delay on the loop current being cut.

    73

    Alf

    G3WSD

      ----- Original Message ----- 

      From: k0bx at arrl.net 

      To: W2HX ; greenkeys at mailman.qth.net 

      Sent: Monday, March 03, 2014 8:34 PM

      Subject: Re: [GreenKeys] suggestion for ST6 Modification.

      I believe the HAL ST-6 does this already.  When the auto-start relay times out, it also disconnects the loop supply.

      Joe K0BX

      #1 Honor Roll Mixed
      Honor Roll RTTY
      5BWAS

      Stop the insanity!
      Please do not add me to any distribution lists (Joke, Stories or Junk) without my permission.

--------------------------------------------------------------------------

      From: W2HX <w2hx at w2hx.com>
      To: "greenkeys at mailman.qth.net" <greenkeys at mailman.qth.net> 
      Sent: Monday, March 3, 2014 5:39 PM
      Subject: [GreenKeys] suggestion for ST6 Modification.

      Hello all,

      I’ve been bitten with the autostart bug. As I refamiliarize myself with the ST6 (having not played with it much in a few years).  I realized that even after it turns the motor outlet off, the loop current remains flowing. I thought it would be a good mod to have the loop open up when the motor turns off to safe heat, magnets, etc.  I thought one solution might be to change the motor relay to one that has another pole. Then run the loop through that pole. So when the relay opens, so does the loop.  

      But I wonder if there would be a more elegant solution that would be purely electronic and not have to change the relay.  Or perhaps there really is not benefit in turning off the loop. 

      73 Eugene W2HX

      ______________________________________________________________
      GreenKeys mailing list
      Home: http://mailman.qth.net/mailman/listinfo/greenkeys
      Help: http://mailman.qth.net/mmfaq.htm
      Post: mailto:GreenKeys at mailman.qth.net

      2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
      1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
      Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

      This list hosted by: http://www.qsl.net
      Please help support this email list: http://www.qsl.net/donate.html

----------------------------------------------------------------------------

    ______________________________________________________________
    GreenKeys mailing list
    Home: http://mailman.qth.net/mailman/listinfo/greenkeys
    Help: http://mailman.qth.net/mmfaq.htm
    Post: mailto:GreenKeys at mailman.qth.net

    2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
    1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
    Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

    This list hosted by: http://www.qsl.net
    Please help support this email list: http://www.qsl.net/donate.html 

----------------------------------------------------------------------------

    No virus found in this message.
    Checked by AVG - www.avg.com
    Version: 2012.0.2247 / Virus Database: 3705/6642 - Release Date: 03/02/14

------------------------------------------------------------------------------

  ______________________________________________________________
  GreenKeys mailing list
  Home: http://mailman.qth.net/mailman/listinfo/greenkeys
  Help: http://mailman.qth.net/mmfaq.htm
  Post: mailto:GreenKeys at mailman.qth.net

  2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
  1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
  Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

  This list hosted by: http://www.qsl.net
  Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20140304/fd965734/attachment.html>